init server

vendor/google.golang.org/api/AUTHORS

@@ -0,0 +1,11 @@
+# This is the official list of authors for copyright purposes.
+# This file is distinct from the CONTRIBUTORS files.
+# See the latter for an explanation.
+
+# Names should be added to this file as
+#	Name or Organization <email address>
+# The email address is not required for organizations.
+
+# Please keep the list sorted.
+Google Inc.
+LightStep Inc.

vendor/google.golang.org/api/CONTRIBUTORS

@@ -0,0 +1,56 @@
+# This is the official list of people who can contribute
+# (and typically have contributed) code to the repository.
+# The AUTHORS file lists the copyright holders; this file
+# lists people.  For example, Google employees are listed here
+# but not in AUTHORS, because Google holds the copyright.
+#
+# The submission process automatically checks to make sure
+# that people submitting code are listed in this file (by email address).
+#
+# Names should be added to this file only after verifying that
+# the individual or the individual's organization has agreed to
+# the appropriate Contributor License Agreement, found here:
+#
+#     https://cla.developers.google.com/about/google-individual
+#     https://cla.developers.google.com/about/google-corporate
+#
+# The CLA can be filled out on the web:
+#
+#     https://cla.developers.google.com/
+#
+# When adding J Random Contributor's name to this file,
+# either J's name or J's organization's name should be
+# added to the AUTHORS file, depending on whether the
+# individual or corporate CLA was used.
+
+# Names should be added to this file like so:
+#     Name <email address>
+#
+# An entry with two email addresses specifies that the
+# first address should be used in the submit logs and
+# that the second address should be recognized as the
+# same person when interacting with Rietveld.
+
+# Please keep the list sorted.
+
+Alain Vongsouvanhalainv <alainv@google.com>
+Andrew Gerrand <adg@golang.org>
+Brad Fitzpatrick <bradfitz@golang.org>
+Eric Koleda <ekoleda+devrel@googlers.com>
+Francesc Campoy <campoy@golang.org>
+Garrick Evans <garrick@google.com>
+Glenn Lewis <gmlewis@google.com>
+Ivan Krasin <krasin@golang.org>
+Jason Hall <jasonhall@google.com>
+Johan Euphrosine <proppy@google.com>
+Kostik Shtoyk <kostik@google.com>
+Kunpei Sakai <namusyaka@gmail.com>
+Matthew Dolan <dolan@lightstep.com>
+Matthew Whisenhunt <matt.whisenhunt@gmail.com>
+Michael McGreevy <mcgreevy@golang.org>
+Nick Craig-Wood <nickcw@gmail.com>
+Robbie Trencheny <me@robbiet.us>
+Ross Light <light@google.com>
+Sarah Adams <shadams@google.com>
+Scott Van Woudenberg <scottvw@google.com>
+Takashi Matsuo <tmatsuo@google.com>

vendor/google.golang.org/api/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2011 Google Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/google.golang.org/api/googleapi/googleapi.go

@@ -0,0 +1,448 @@
+// Copyright 2011 Google LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package googleapi contains the common code shared by all Google API
+// libraries.
+package googleapi // import "google.golang.org/api/googleapi"
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"google.golang.org/api/internal/third_party/uritemplates"
+)
+
+// ContentTyper is an interface for Readers which know (or would like
+// to override) their Content-Type. If a media body doesn't implement
+// ContentTyper, the type is sniffed from the content using
+// http.DetectContentType.
+type ContentTyper interface {
+	ContentType() string
+}
+
+// A SizeReaderAt is a ReaderAt with a Size method.
+// An io.SectionReader implements SizeReaderAt.
+type SizeReaderAt interface {
+	io.ReaderAt
+	Size() int64
+}
+
+// ServerResponse is embedded in each Do response and
+// provides the HTTP status code and header sent by the server.
+type ServerResponse struct {
+	// HTTPStatusCode is the server's response status code. When using a
+	// resource method's Do call, this will always be in the 2xx range.
+	HTTPStatusCode int
+	// Header contains the response header fields from the server.
+	Header http.Header
+}
+
+const (
+	// Version defines the gax version being used. This is typically sent
+	// in an HTTP header to services.
+	Version = "0.5"
+
+	// UserAgent is the header string used to identify this package.
+	UserAgent = "google-api-go-client/" + Version
+
+	// DefaultUploadChunkSize is the default chunk size to use for resumable
+	// uploads if not specified by the user.
+	DefaultUploadChunkSize = 16 * 1024 * 1024
+
+	// MinUploadChunkSize is the minimum chunk size that can be used for
+	// resumable uploads.  All user-specified chunk sizes must be multiple of
+	// this value.
+	MinUploadChunkSize = 256 * 1024
+)
+
+// Error contains an error response from the server.
+type Error struct {
+	// Code is the HTTP response status code and will always be populated.
+	Code int `json:"code"`
+	// Message is the server response message and is only populated when
+	// explicitly referenced by the JSON server response.
+	Message string `json:"message"`
+	// Details provide more context to an error.
+	Details []interface{} `json:"details"`
+	// Body is the raw response returned by the server.
+	// It is often but not always JSON, depending on how the request fails.
+	Body string
+	// Header contains the response header fields from the server.
+	Header http.Header
+
+	Errors []ErrorItem
+}
+
+// ErrorItem is a detailed error code & message from the Google API frontend.
+type ErrorItem struct {
+	// Reason is the typed error code. For example: "some_example".
+	Reason string `json:"reason"`
+	// Message is the human-readable description of the error.
+	Message string `json:"message"`
+}
+
+func (e *Error) Error() string {
+	if len(e.Errors) == 0 && e.Message == "" {
+		return fmt.Sprintf("googleapi: got HTTP response code %d with body: %v", e.Code, e.Body)
+	}
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "googleapi: Error %d: ", e.Code)
+	if e.Message != "" {
+		fmt.Fprintf(&buf, "%s", e.Message)
+	}
+	if len(e.Details) > 0 {
+		var detailBuf bytes.Buffer
+		enc := json.NewEncoder(&detailBuf)
+		enc.SetIndent("", "  ")
+		if err := enc.Encode(e.Details); err == nil {
+			fmt.Fprint(&buf, "\nDetails:")
+			fmt.Fprintf(&buf, "\n%s", detailBuf.String())
+
+		}
+	}
+	if len(e.Errors) == 0 {
+		return strings.TrimSpace(buf.String())
+	}
+	if len(e.Errors) == 1 && e.Errors[0].Message == e.Message {
+		fmt.Fprintf(&buf, ", %s", e.Errors[0].Reason)
+		return buf.String()
+	}
+	fmt.Fprintln(&buf, "\nMore details:")
+	for _, v := range e.Errors {
+		fmt.Fprintf(&buf, "Reason: %s, Message: %s\n", v.Reason, v.Message)
+	}
+	return buf.String()
+}
+
+type errorReply struct {
+	Error *Error `json:"error"`
+}
+
+// CheckResponse returns an error (of type *Error) if the response
+// status code is not 2xx.
+func CheckResponse(res *http.Response) error {
+	if res.StatusCode >= 200 && res.StatusCode <= 299 {
+		return nil
+	}
+	slurp, err := ioutil.ReadAll(res.Body)
+	if err == nil {
+		jerr := new(errorReply)
+		err = json.Unmarshal(slurp, jerr)
+		if err == nil && jerr.Error != nil {
+			if jerr.Error.Code == 0 {
+				jerr.Error.Code = res.StatusCode
+			}
+			jerr.Error.Body = string(slurp)
+			return jerr.Error
+		}
+	}
+	return &Error{
+		Code:   res.StatusCode,
+		Body:   string(slurp),
+		Header: res.Header,
+	}
+}
+
+// IsNotModified reports whether err is the result of the
+// server replying with http.StatusNotModified.
+// Such error values are sometimes returned by "Do" methods
+// on calls when If-None-Match is used.
+func IsNotModified(err error) bool {
+	if err == nil {
+		return false
+	}
+	ae, ok := err.(*Error)
+	return ok && ae.Code == http.StatusNotModified
+}
+
+// CheckMediaResponse returns an error (of type *Error) if the response
+// status code is not 2xx. Unlike CheckResponse it does not assume the
+// body is a JSON error document.
+// It is the caller's responsibility to close res.Body.
+func CheckMediaResponse(res *http.Response) error {
+	if res.StatusCode >= 200 && res.StatusCode <= 299 {
+		return nil
+	}
+	slurp, _ := ioutil.ReadAll(io.LimitReader(res.Body, 1<<20))
+	return &Error{
+		Code: res.StatusCode,
+		Body: string(slurp),
+	}
+}
+
+// MarshalStyle defines whether to marshal JSON with a {"data": ...} wrapper.
+type MarshalStyle bool
+
+// WithDataWrapper marshals JSON with a {"data": ...} wrapper.
+var WithDataWrapper = MarshalStyle(true)
+
+// WithoutDataWrapper marshals JSON without a {"data": ...} wrapper.
+var WithoutDataWrapper = MarshalStyle(false)
+
+func (wrap MarshalStyle) JSONReader(v interface{}) (io.Reader, error) {
+	buf := new(bytes.Buffer)
+	if wrap {
+		buf.Write([]byte(`{"data": `))
+	}
+	err := json.NewEncoder(buf).Encode(v)
+	if err != nil {
+		return nil, err
+	}
+	if wrap {
+		buf.Write([]byte(`}`))
+	}
+	return buf, nil
+}
+
+// ProgressUpdater is a function that is called upon every progress update of a resumable upload.
+// This is the only part of a resumable upload (from googleapi) that is usable by the developer.
+// The remaining usable pieces of resumable uploads is exposed in each auto-generated API.
+type ProgressUpdater func(current, total int64)
+
+// MediaOption defines the interface for setting media options.
+type MediaOption interface {
+	setOptions(o *MediaOptions)
+}
+
+type contentTypeOption string
+
+func (ct contentTypeOption) setOptions(o *MediaOptions) {
+	o.ContentType = string(ct)
+	if o.ContentType == "" {
+		o.ForceEmptyContentType = true
+	}
+}
+
+// ContentType returns a MediaOption which sets the Content-Type header for media uploads.
+// If ctype is empty, the Content-Type header will be omitted.
+func ContentType(ctype string) MediaOption {
+	return contentTypeOption(ctype)
+}
+
+type chunkSizeOption int
+
+func (cs chunkSizeOption) setOptions(o *MediaOptions) {
+	size := int(cs)
+	if size%MinUploadChunkSize != 0 {
+		size += MinUploadChunkSize - (size % MinUploadChunkSize)
+	}
+	o.ChunkSize = size
+}
+
+// ChunkSize returns a MediaOption which sets the chunk size for media uploads.
+// size will be rounded up to the nearest multiple of 256K.
+// Media which contains fewer than size bytes will be uploaded in a single request.
+// Media which contains size bytes or more will be uploaded in separate chunks.
+// If size is zero, media will be uploaded in a single request.
+func ChunkSize(size int) MediaOption {
+	return chunkSizeOption(size)
+}
+
+// MediaOptions stores options for customizing media upload.  It is not used by developers directly.
+type MediaOptions struct {
+	ContentType           string
+	ForceEmptyContentType bool
+
+	ChunkSize int
+}
+
+// ProcessMediaOptions stores options from opts in a MediaOptions.
+// It is not used by developers directly.
+func ProcessMediaOptions(opts []MediaOption) *MediaOptions {
+	mo := &MediaOptions{ChunkSize: DefaultUploadChunkSize}
+	for _, o := range opts {
+		o.setOptions(mo)
+	}
+	return mo
+}
+
+// ResolveRelative resolves relatives such as "http://www.golang.org/" and
+// "topics/myproject/mytopic" into a single string, such as
+// "http://www.golang.org/topics/myproject/mytopic". It strips all parent
+// references (e.g. ../..) as well as anything after the host
+// (e.g. /bar/gaz gets stripped out of foo.com/bar/gaz).
+//
+// ResolveRelative panics if either basestr or relstr is not able to be parsed.
+func ResolveRelative(basestr, relstr string) string {
+	u, err := url.Parse(basestr)
+	if err != nil {
+		panic(fmt.Sprintf("failed to parse %q", basestr))
+	}
+	afterColonPath := ""
+	if i := strings.IndexRune(relstr, ':'); i > 0 {
+		afterColonPath = relstr[i+1:]
+		relstr = relstr[:i]
+	}
+	rel, err := url.Parse(relstr)
+	if err != nil {
+		panic(fmt.Sprintf("failed to parse %q", relstr))
+	}
+	u = u.ResolveReference(rel)
+	us := u.String()
+	if afterColonPath != "" {
+		us = fmt.Sprintf("%s:%s", us, afterColonPath)
+	}
+	us = strings.Replace(us, "%7B", "{", -1)
+	us = strings.Replace(us, "%7D", "}", -1)
+	us = strings.Replace(us, "%2A", "*", -1)
+	return us
+}
+
+// Expand subsitutes any {encoded} strings in the URL passed in using
+// the map supplied.
+//
+// This calls SetOpaque to avoid encoding of the parameters in the URL path.
+func Expand(u *url.URL, expansions map[string]string) {
+	escaped, unescaped, err := uritemplates.Expand(u.Path, expansions)
+	if err == nil {
+		u.Path = unescaped
+		u.RawPath = escaped
+	}
+}
+
+// CloseBody is used to close res.Body.
+// Prior to calling Close, it also tries to Read a small amount to see an EOF.
+// Not seeing an EOF can prevent HTTP Transports from reusing connections.
+func CloseBody(res *http.Response) {
+	if res == nil || res.Body == nil {
+		return
+	}
+	// Justification for 3 byte reads: two for up to "\r\n" after
+	// a JSON/XML document, and then 1 to see EOF if we haven't yet.
+	// TODO(bradfitz): detect Go 1.3+ and skip these reads.
+	// See https://codereview.appspot.com/58240043
+	// and https://codereview.appspot.com/49570044
+	buf := make([]byte, 1)
+	for i := 0; i < 3; i++ {
+		_, err := res.Body.Read(buf)
+		if err != nil {
+			break
+		}
+	}
+	res.Body.Close()
+
+}
+
+// VariantType returns the type name of the given variant.
+// If the map doesn't contain the named key or the value is not a []interface{}, "" is returned.
+// This is used to support "variant" APIs that can return one of a number of different types.
+func VariantType(t map[string]interface{}) string {
+	s, _ := t["type"].(string)
+	return s
+}
+
+// ConvertVariant uses the JSON encoder/decoder to fill in the struct 'dst' with the fields found in variant 'v'.
+// This is used to support "variant" APIs that can return one of a number of different types.
+// It reports whether the conversion was successful.
+func ConvertVariant(v map[string]interface{}, dst interface{}) bool {
+	var buf bytes.Buffer
+	err := json.NewEncoder(&buf).Encode(v)
+	if err != nil {
+		return false
+	}
+	return json.Unmarshal(buf.Bytes(), dst) == nil
+}
+
+// A Field names a field to be retrieved with a partial response.
+// https://cloud.google.com/storage/docs/json_api/v1/how-tos/performance
+//
+// Partial responses can dramatically reduce the amount of data that must be sent to your application.
+// In order to request partial responses, you can specify the full list of fields
+// that your application needs by adding the Fields option to your request.
+//
+// Field strings use camelCase with leading lower-case characters to identify fields within the response.
+//
+// For example, if your response has a "NextPageToken" and a slice of "Items" with "Id" fields,
+// you could request just those fields like this:
+//
+//     svc.Events.List().Fields("nextPageToken", "items/id").Do()
+//
+// or if you were also interested in each Item's "Updated" field, you can combine them like this:
+//
+//     svc.Events.List().Fields("nextPageToken", "items(id,updated)").Do()
+//
+// Another way to find field names is through the Google API explorer:
+// https://developers.google.com/apis-explorer/#p/
+type Field string
+
+// CombineFields combines fields into a single string.
+func CombineFields(s []Field) string {
+	r := make([]string, len(s))
+	for i, v := range s {
+		r[i] = string(v)
+	}
+	return strings.Join(r, ",")
+}
+
+// A CallOption is an optional argument to an API call.
+// It should be treated as an opaque value by users of Google APIs.
+//
+// A CallOption is something that configures an API call in a way that is
+// not specific to that API; for instance, controlling the quota user for
+// an API call is common across many APIs, and is thus a CallOption.
+type CallOption interface {
+	Get() (key, value string)
+}
+
+// A MultiCallOption is an option argument to an API call and can be passed
+// anywhere a CallOption is accepted. It additionally supports returning a slice
+// of values for a given key.
+type MultiCallOption interface {
+	CallOption
+	GetMulti() (key string, value []string)
+}
+
+// QuotaUser returns a CallOption that will set the quota user for a call.
+// The quota user can be used by server-side applications to control accounting.
+// It can be an arbitrary string up to 40 characters, and will override UserIP
+// if both are provided.
+func QuotaUser(u string) CallOption { return quotaUser(u) }
+
+type quotaUser string
+
+func (q quotaUser) Get() (string, string) { return "quotaUser", string(q) }
+
+// UserIP returns a CallOption that will set the "userIp" parameter of a call.
+// This should be the IP address of the originating request.
+func UserIP(ip string) CallOption { return userIP(ip) }
+
+type userIP string
+
+func (i userIP) Get() (string, string) { return "userIp", string(i) }
+
+// Trace returns a CallOption that enables diagnostic tracing for a call.
+// traceToken is an ID supplied by Google support.
+func Trace(traceToken string) CallOption { return traceTok(traceToken) }
+
+type traceTok string
+
+func (t traceTok) Get() (string, string) { return "trace", "token:" + string(t) }
+
+type queryParameter struct {
+	key    string
+	values []string
+}
+
+// QueryParameter allows setting the value(s) of an arbitrary key.
+func QueryParameter(key string, values ...string) CallOption {
+	return queryParameter{key: key, values: append([]string{}, values...)}
+}
+
+// Get will never actually be called -- GetMulti will.
+func (q queryParameter) Get() (string, string) {
+	return "", ""
+}
+
+// GetMulti returns the key and values values associated to that key.
+func (q queryParameter) GetMulti() (string, []string) {
+	return q.key, q.values
+}
+
+// TODO: Fields too

vendor/google.golang.org/api/googleapi/transport/apikey.go

@@ -0,0 +1,44 @@
+// Copyright 2012 Google LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package transport contains HTTP transports used to make
+// authenticated API requests.
+//
+// This package is DEPRECATED. Users should instead use,
+//
+//     service, err := NewService(..., option.WithAPIKey(...))
+package transport
+
+import (
+	"errors"
+	"net/http"
+)
+
+// APIKey is an HTTP Transport which wraps an underlying transport and
+// appends an API Key "key" parameter to the URL of outgoing requests.
+//
+// Deprecated: please use NewService(..., option.WithAPIKey(...)) instead.
+type APIKey struct {
+	// Key is the API Key to set on requests.
+	Key string
+
+	// Transport is the underlying HTTP transport.
+	// If nil, http.DefaultTransport is used.
+	Transport http.RoundTripper
+}
+
+func (t *APIKey) RoundTrip(req *http.Request) (*http.Response, error) {
+	rt := t.Transport
+	if rt == nil {
+		rt = http.DefaultTransport
+		if rt == nil {
+			return nil, errors.New("googleapi/transport: no Transport specified or available")
+		}
+	}
+	newReq := *req
+	args := newReq.URL.Query()
+	args.Set("key", t.Key)
+	newReq.URL.RawQuery = args.Encode()
+	return rt.RoundTrip(&newReq)
+}

vendor/google.golang.org/api/googleapi/types.go

@@ -0,0 +1,202 @@
+// Copyright 2013 Google LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package googleapi
+
+import (
+	"encoding/json"
+	"errors"
+	"strconv"
+)
+
+// Int64s is a slice of int64s that marshal as quoted strings in JSON.
+type Int64s []int64
+
+func (q *Int64s) UnmarshalJSON(raw []byte) error {
+	*q = (*q)[:0]
+	var ss []string
+	if err := json.Unmarshal(raw, &ss); err != nil {
+		return err
+	}
+	for _, s := range ss {
+		v, err := strconv.ParseInt(s, 10, 64)
+		if err != nil {
+			return err
+		}
+		*q = append(*q, int64(v))
+	}
+	return nil
+}
+
+// Int32s is a slice of int32s that marshal as quoted strings in JSON.
+type Int32s []int32
+
+func (q *Int32s) UnmarshalJSON(raw []byte) error {
+	*q = (*q)[:0]
+	var ss []string
+	if err := json.Unmarshal(raw, &ss); err != nil {
+		return err
+	}
+	for _, s := range ss {
+		v, err := strconv.ParseInt(s, 10, 32)
+		if err != nil {
+			return err
+		}
+		*q = append(*q, int32(v))
+	}
+	return nil
+}
+
+// Uint64s is a slice of uint64s that marshal as quoted strings in JSON.
+type Uint64s []uint64
+
+func (q *Uint64s) UnmarshalJSON(raw []byte) error {
+	*q = (*q)[:0]
+	var ss []string
+	if err := json.Unmarshal(raw, &ss); err != nil {
+		return err
+	}
+	for _, s := range ss {
+		v, err := strconv.ParseUint(s, 10, 64)
+		if err != nil {
+			return err
+		}
+		*q = append(*q, uint64(v))
+	}
+	return nil
+}
+
+// Uint32s is a slice of uint32s that marshal as quoted strings in JSON.
+type Uint32s []uint32
+
+func (q *Uint32s) UnmarshalJSON(raw []byte) error {
+	*q = (*q)[:0]
+	var ss []string
+	if err := json.Unmarshal(raw, &ss); err != nil {
+		return err
+	}
+	for _, s := range ss {
+		v, err := strconv.ParseUint(s, 10, 32)
+		if err != nil {
+			return err
+		}
+		*q = append(*q, uint32(v))
+	}
+	return nil
+}
+
+// Float64s is a slice of float64s that marshal as quoted strings in JSON.
+type Float64s []float64
+
+func (q *Float64s) UnmarshalJSON(raw []byte) error {
+	*q = (*q)[:0]
+	var ss []string
+	if err := json.Unmarshal(raw, &ss); err != nil {
+		return err
+	}
+	for _, s := range ss {
+		v, err := strconv.ParseFloat(s, 64)
+		if err != nil {
+			return err
+		}
+		*q = append(*q, float64(v))
+	}
+	return nil
+}
+
+func quotedList(n int, fn func(dst []byte, i int) []byte) ([]byte, error) {
+	dst := make([]byte, 0, 2+n*10) // somewhat arbitrary
+	dst = append(dst, '[')
+	for i := 0; i < n; i++ {
+		if i > 0 {
+			dst = append(dst, ',')
+		}
+		dst = append(dst, '"')
+		dst = fn(dst, i)
+		dst = append(dst, '"')
+	}
+	dst = append(dst, ']')
+	return dst, nil
+}
+
+func (q Int64s) MarshalJSON() ([]byte, error) {
+	return quotedList(len(q), func(dst []byte, i int) []byte {
+		return strconv.AppendInt(dst, q[i], 10)
+	})
+}
+
+func (q Int32s) MarshalJSON() ([]byte, error) {
+	return quotedList(len(q), func(dst []byte, i int) []byte {
+		return strconv.AppendInt(dst, int64(q[i]), 10)
+	})
+}
+
+func (q Uint64s) MarshalJSON() ([]byte, error) {
+	return quotedList(len(q), func(dst []byte, i int) []byte {
+		return strconv.AppendUint(dst, q[i], 10)
+	})
+}
+
+func (q Uint32s) MarshalJSON() ([]byte, error) {
+	return quotedList(len(q), func(dst []byte, i int) []byte {
+		return strconv.AppendUint(dst, uint64(q[i]), 10)
+	})
+}
+
+func (q Float64s) MarshalJSON() ([]byte, error) {
+	return quotedList(len(q), func(dst []byte, i int) []byte {
+		return strconv.AppendFloat(dst, q[i], 'g', -1, 64)
+	})
+}
+
+// RawMessage is a raw encoded JSON value.
+// It is identical to json.RawMessage, except it does not suffer from
+// https://golang.org/issue/14493.
+type RawMessage []byte
+
+// MarshalJSON returns m.
+func (m RawMessage) MarshalJSON() ([]byte, error) {
+	return m, nil
+}
+
+// UnmarshalJSON sets *m to a copy of data.
+func (m *RawMessage) UnmarshalJSON(data []byte) error {
+	if m == nil {
+		return errors.New("googleapi.RawMessage: UnmarshalJSON on nil pointer")
+	}
+	*m = append((*m)[:0], data...)
+	return nil
+}
+
+/*
+ * Helper routines for simplifying the creation of optional fields of basic type.
+ */
+
+// Bool is a helper routine that allocates a new bool value
+// to store v and returns a pointer to it.
+func Bool(v bool) *bool { return &v }
+
+// Int32 is a helper routine that allocates a new int32 value
+// to store v and returns a pointer to it.
+func Int32(v int32) *int32 { return &v }
+
+// Int64 is a helper routine that allocates a new int64 value
+// to store v and returns a pointer to it.
+func Int64(v int64) *int64 { return &v }
+
+// Float64 is a helper routine that allocates a new float64 value
+// to store v and returns a pointer to it.
+func Float64(v float64) *float64 { return &v }
+
+// Uint32 is a helper routine that allocates a new uint32 value
+// to store v and returns a pointer to it.
+func Uint32(v uint32) *uint32 { return &v }
+
+// Uint64 is a helper routine that allocates a new uint64 value
+// to store v and returns a pointer to it.
+func Uint64(v uint64) *uint64 { return &v }
+
+// String is a helper routine that allocates a new string value
+// to store v and returns a pointer to it.
+func String(v string) *string { return &v }

vendor/google.golang.org/api/internal/conn_pool.go

@@ -0,0 +1,30 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+	"google.golang.org/grpc"
+)
+
+// ConnPool is a pool of grpc.ClientConns.
+type ConnPool interface {
+	// Conn returns a ClientConn from the pool.
+	//
+	// Conns aren't returned to the pool.
+	Conn() *grpc.ClientConn
+
+	// Num returns the number of connections in the pool.
+	//
+	// It will always return the same value.
+	Num() int
+
+	// Close closes every ClientConn in the pool.
+	//
+	// The error returned by Close may be a single error or multiple errors.
+	Close() error
+
+	// ConnPool implements grpc.ClientConnInterface to enable it to be used directly with generated proto stubs.
+	grpc.ClientConnInterface
+}

vendor/google.golang.org/api/internal/creds.go

@@ -0,0 +1,158 @@
+// Copyright 2017 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+
+	"golang.org/x/oauth2"
+	"google.golang.org/api/internal/impersonate"
+
+	"golang.org/x/oauth2/google"
+)
+
+// Creds returns credential information obtained from DialSettings, or if none, then
+// it returns default credential information.
+func Creds(ctx context.Context, ds *DialSettings) (*google.Credentials, error) {
+	creds, err := baseCreds(ctx, ds)
+	if err != nil {
+		return nil, err
+	}
+	if ds.ImpersonationConfig != nil {
+		return impersonateCredentials(ctx, creds, ds)
+	}
+	return creds, nil
+}
+
+func baseCreds(ctx context.Context, ds *DialSettings) (*google.Credentials, error) {
+	if ds.InternalCredentials != nil {
+		return ds.InternalCredentials, nil
+	}
+	if ds.Credentials != nil {
+		return ds.Credentials, nil
+	}
+	if ds.CredentialsJSON != nil {
+		return credentialsFromJSON(ctx, ds.CredentialsJSON, ds)
+	}
+	if ds.CredentialsFile != "" {
+		data, err := ioutil.ReadFile(ds.CredentialsFile)
+		if err != nil {
+			return nil, fmt.Errorf("cannot read credentials file: %v", err)
+		}
+		return credentialsFromJSON(ctx, data, ds)
+	}
+	if ds.TokenSource != nil {
+		return &google.Credentials{TokenSource: ds.TokenSource}, nil
+	}
+	cred, err := google.FindDefaultCredentials(ctx, ds.GetScopes()...)
+	if err != nil {
+		return nil, err
+	}
+	if len(cred.JSON) > 0 {
+		return credentialsFromJSON(ctx, cred.JSON, ds)
+	}
+	// For GAE and GCE, the JSON is empty so return the default credentials directly.
+	return cred, nil
+}
+
+// JSON key file type.
+const (
+	serviceAccountKey = "service_account"
+)
+
+// credentialsFromJSON returns a google.Credentials from the JSON data
+//
+// - A self-signed JWT flow will be executed if the following conditions are
+// met:
+//   (1) At least one of the following is true:
+//       (a) No scope is provided
+//       (b) Scope for self-signed JWT flow is enabled
+//       (c) Audiences are explicitly provided by users
+//   (2) No service account impersontation
+//
+// - Otherwise, executes standard OAuth 2.0 flow
+// More details: google.aip.dev/auth/4111
+func credentialsFromJSON(ctx context.Context, data []byte, ds *DialSettings) (*google.Credentials, error) {
+	// By default, a standard OAuth 2.0 token source is created
+	cred, err := google.CredentialsFromJSON(ctx, data, ds.GetScopes()...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Override the token source to use self-signed JWT if conditions are met
+	isJWTFlow, err := isSelfSignedJWTFlow(data, ds)
+	if err != nil {
+		return nil, err
+	}
+	if isJWTFlow {
+		ts, err := selfSignedJWTTokenSource(data, ds)
+		if err != nil {
+			return nil, err
+		}
+		cred.TokenSource = ts
+	}
+
+	return cred, err
+}
+
+func isSelfSignedJWTFlow(data []byte, ds *DialSettings) (bool, error) {
+	if (ds.EnableJwtWithScope || ds.HasCustomAudience()) &&
+		ds.ImpersonationConfig == nil {
+		// Check if JSON is a service account and if so create a self-signed JWT.
+		var f struct {
+			Type string `json:"type"`
+			// The rest JSON fields are omitted because they are not used.
+		}
+		if err := json.Unmarshal(data, &f); err != nil {
+			return false, err
+		}
+		return f.Type == serviceAccountKey, nil
+	}
+	return false, nil
+}
+
+func selfSignedJWTTokenSource(data []byte, ds *DialSettings) (oauth2.TokenSource, error) {
+	if len(ds.GetScopes()) > 0 && !ds.HasCustomAudience() {
+		// Scopes are preferred in self-signed JWT unless the scope is not available
+		// or a custom audience is used.
+		return google.JWTAccessTokenSourceWithScope(data, ds.GetScopes()...)
+	} else if ds.GetAudience() != "" {
+		// Fallback to audience if scope is not provided
+		return google.JWTAccessTokenSourceFromJSON(data, ds.GetAudience())
+	} else {
+		return nil, errors.New("neither scopes or audience are available for the self-signed JWT")
+	}
+}
+
+// QuotaProjectFromCreds returns the quota project from the JSON blob in the provided credentials.
+//
+// NOTE(cbro): consider promoting this to a field on google.Credentials.
+func QuotaProjectFromCreds(cred *google.Credentials) string {
+	var v struct {
+		QuotaProject string `json:"quota_project_id"`
+	}
+	if err := json.Unmarshal(cred.JSON, &v); err != nil {
+		return ""
+	}
+	return v.QuotaProject
+}
+
+func impersonateCredentials(ctx context.Context, creds *google.Credentials, ds *DialSettings) (*google.Credentials, error) {
+	if len(ds.ImpersonationConfig.Scopes) == 0 {
+		ds.ImpersonationConfig.Scopes = ds.GetScopes()
+	}
+	ts, err := impersonate.TokenSource(ctx, creds.TokenSource, ds.ImpersonationConfig)
+	if err != nil {
+		return nil, err
+	}
+	return &google.Credentials{
+		TokenSource: ts,
+		ProjectID:   creds.ProjectID,
+	}, nil
+}

vendor/google.golang.org/api/internal/gensupport/buffer.go

@@ -0,0 +1,79 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"bytes"
+	"io"
+
+	"google.golang.org/api/googleapi"
+)
+
+// MediaBuffer buffers data from an io.Reader to support uploading media in
+// retryable chunks. It should be created with NewMediaBuffer.
+type MediaBuffer struct {
+	media io.Reader
+
+	chunk []byte // The current chunk which is pending upload.  The capacity is the chunk size.
+	err   error  // Any error generated when populating chunk by reading media.
+
+	// The absolute position of chunk in the underlying media.
+	off int64
+}
+
+// NewMediaBuffer initializes a MediaBuffer.
+func NewMediaBuffer(media io.Reader, chunkSize int) *MediaBuffer {
+	return &MediaBuffer{media: media, chunk: make([]byte, 0, chunkSize)}
+}
+
+// Chunk returns the current buffered chunk, the offset in the underlying media
+// from which the chunk is drawn, and the size of the chunk.
+// Successive calls to Chunk return the same chunk between calls to Next.
+func (mb *MediaBuffer) Chunk() (chunk io.Reader, off int64, size int, err error) {
+	// There may already be data in chunk if Next has not been called since the previous call to Chunk.
+	if mb.err == nil && len(mb.chunk) == 0 {
+		mb.err = mb.loadChunk()
+	}
+	return bytes.NewReader(mb.chunk), mb.off, len(mb.chunk), mb.err
+}
+
+// loadChunk will read from media into chunk, up to the capacity of chunk.
+func (mb *MediaBuffer) loadChunk() error {
+	bufSize := cap(mb.chunk)
+	mb.chunk = mb.chunk[:bufSize]
+
+	read := 0
+	var err error
+	for err == nil && read < bufSize {
+		var n int
+		n, err = mb.media.Read(mb.chunk[read:])
+		read += n
+	}
+	mb.chunk = mb.chunk[:read]
+	return err
+}
+
+// Next advances to the next chunk, which will be returned by the next call to Chunk.
+// Calls to Next without a corresponding prior call to Chunk will have no effect.
+func (mb *MediaBuffer) Next() {
+	mb.off += int64(len(mb.chunk))
+	mb.chunk = mb.chunk[0:0]
+}
+
+type readerTyper struct {
+	io.Reader
+	googleapi.ContentTyper
+}
+
+// ReaderAtToReader adapts a ReaderAt to be used as a Reader.
+// If ra implements googleapi.ContentTyper, then the returned reader
+// will also implement googleapi.ContentTyper, delegating to ra.
+func ReaderAtToReader(ra io.ReaderAt, size int64) io.Reader {
+	r := io.NewSectionReader(ra, 0, size)
+	if typer, ok := ra.(googleapi.ContentTyper); ok {
+		return readerTyper{r, typer}
+	}
+	return r
+}

vendor/google.golang.org/api/internal/gensupport/doc.go

@@ -0,0 +1,10 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package gensupport is an internal implementation detail used by code
+// generated by the google-api-go-generator tool.
+//
+// This package may be modified at any time without regard for backwards
+// compatibility. It should not be used directly by API users.
+package gensupport

vendor/google.golang.org/api/internal/gensupport/json.go

@@ -0,0 +1,211 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+// MarshalJSON returns a JSON encoding of schema containing only selected fields.
+// A field is selected if any of the following is true:
+//   * it has a non-empty value
+//   * its field name is present in forceSendFields and it is not a nil pointer or nil interface
+//   * its field name is present in nullFields.
+// The JSON key for each selected field is taken from the field's json: struct tag.
+func MarshalJSON(schema interface{}, forceSendFields, nullFields []string) ([]byte, error) {
+	if len(forceSendFields) == 0 && len(nullFields) == 0 {
+		return json.Marshal(schema)
+	}
+
+	mustInclude := make(map[string]bool)
+	for _, f := range forceSendFields {
+		mustInclude[f] = true
+	}
+	useNull := make(map[string]bool)
+	useNullMaps := make(map[string]map[string]bool)
+	for _, nf := range nullFields {
+		parts := strings.SplitN(nf, ".", 2)
+		field := parts[0]
+		if len(parts) == 1 {
+			useNull[field] = true
+		} else {
+			if useNullMaps[field] == nil {
+				useNullMaps[field] = map[string]bool{}
+			}
+			useNullMaps[field][parts[1]] = true
+		}
+	}
+
+	dataMap, err := schemaToMap(schema, mustInclude, useNull, useNullMaps)
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal(dataMap)
+}
+
+func schemaToMap(schema interface{}, mustInclude, useNull map[string]bool, useNullMaps map[string]map[string]bool) (map[string]interface{}, error) {
+	m := make(map[string]interface{})
+	s := reflect.ValueOf(schema)
+	st := s.Type()
+
+	for i := 0; i < s.NumField(); i++ {
+		jsonTag := st.Field(i).Tag.Get("json")
+		if jsonTag == "" {
+			continue
+		}
+		tag, err := parseJSONTag(jsonTag)
+		if err != nil {
+			return nil, err
+		}
+		if tag.ignore {
+			continue
+		}
+
+		v := s.Field(i)
+		f := st.Field(i)
+
+		if useNull[f.Name] {
+			if !isEmptyValue(v) {
+				return nil, fmt.Errorf("field %q in NullFields has non-empty value", f.Name)
+			}
+			m[tag.apiName] = nil
+			continue
+		}
+
+		if !includeField(v, f, mustInclude) {
+			continue
+		}
+
+		// If map fields are explicitly set to null, use a map[string]interface{}.
+		if f.Type.Kind() == reflect.Map && useNullMaps[f.Name] != nil {
+			ms, ok := v.Interface().(map[string]string)
+			if !ok {
+				return nil, fmt.Errorf("field %q has keys in NullFields but is not a map[string]string", f.Name)
+			}
+			mi := map[string]interface{}{}
+			for k, v := range ms {
+				mi[k] = v
+			}
+			for k := range useNullMaps[f.Name] {
+				mi[k] = nil
+			}
+			m[tag.apiName] = mi
+			continue
+		}
+
+		// nil maps are treated as empty maps.
+		if f.Type.Kind() == reflect.Map && v.IsNil() {
+			m[tag.apiName] = map[string]string{}
+			continue
+		}
+
+		// nil slices are treated as empty slices.
+		if f.Type.Kind() == reflect.Slice && v.IsNil() {
+			m[tag.apiName] = []bool{}
+			continue
+		}
+
+		if tag.stringFormat {
+			m[tag.apiName] = formatAsString(v, f.Type.Kind())
+		} else {
+			m[tag.apiName] = v.Interface()
+		}
+	}
+	return m, nil
+}
+
+// formatAsString returns a string representation of v, dereferencing it first if possible.
+func formatAsString(v reflect.Value, kind reflect.Kind) string {
+	if kind == reflect.Ptr && !v.IsNil() {
+		v = v.Elem()
+	}
+
+	return fmt.Sprintf("%v", v.Interface())
+}
+
+// jsonTag represents a restricted version of the struct tag format used by encoding/json.
+// It is used to describe the JSON encoding of fields in a Schema struct.
+type jsonTag struct {
+	apiName      string
+	stringFormat bool
+	ignore       bool
+}
+
+// parseJSONTag parses a restricted version of the struct tag format used by encoding/json.
+// The format of the tag must match that generated by the Schema.writeSchemaStruct method
+// in the api generator.
+func parseJSONTag(val string) (jsonTag, error) {
+	if val == "-" {
+		return jsonTag{ignore: true}, nil
+	}
+
+	var tag jsonTag
+
+	i := strings.Index(val, ",")
+	if i == -1 || val[:i] == "" {
+		return tag, fmt.Errorf("malformed json tag: %s", val)
+	}
+
+	tag = jsonTag{
+		apiName: val[:i],
+	}
+
+	switch val[i+1:] {
+	case "omitempty":
+	case "omitempty,string":
+		tag.stringFormat = true
+	default:
+		return tag, fmt.Errorf("malformed json tag: %s", val)
+	}
+
+	return tag, nil
+}
+
+// Reports whether the struct field "f" with value "v" should be included in JSON output.
+func includeField(v reflect.Value, f reflect.StructField, mustInclude map[string]bool) bool {
+	// The regular JSON encoding of a nil pointer is "null", which means "delete this field".
+	// Therefore, we could enable field deletion by honoring pointer fields' presence in the mustInclude set.
+	// However, many fields are not pointers, so there would be no way to delete these fields.
+	// Rather than partially supporting field deletion, we ignore mustInclude for nil pointer fields.
+	// Deletion will be handled by a separate mechanism.
+	if f.Type.Kind() == reflect.Ptr && v.IsNil() {
+		return false
+	}
+
+	// The "any" type is represented as an interface{}.  If this interface
+	// is nil, there is no reasonable representation to send.  We ignore
+	// these fields, for the same reasons as given above for pointers.
+	if f.Type.Kind() == reflect.Interface && v.IsNil() {
+		return false
+	}
+
+	return mustInclude[f.Name] || !isEmptyValue(v)
+}
+
+// isEmptyValue reports whether v is the empty value for its type.  This
+// implementation is based on that of the encoding/json package, but its
+// correctness does not depend on it being identical. What's important is that
+// this function return false in situations where v should not be sent as part
+// of a PATCH operation.
+func isEmptyValue(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	}
+	return false
+}

vendor/google.golang.org/api/internal/gensupport/jsonfloat.go

@@ -0,0 +1,47 @@
+// Copyright 2016 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math"
+)
+
+// JSONFloat64 is a float64 that supports proper unmarshaling of special float
+// values in JSON, according to
+// https://developers.google.com/protocol-buffers/docs/proto3#json. Although
+// that is a proto-to-JSON spec, it applies to all Google APIs.
+//
+// The jsonpb package
+// (https://github.com/golang/protobuf/blob/master/jsonpb/jsonpb.go) has
+// similar functionality, but only for direct translation from proto messages
+// to JSON.
+type JSONFloat64 float64
+
+func (f *JSONFloat64) UnmarshalJSON(data []byte) error {
+	var ff float64
+	if err := json.Unmarshal(data, &ff); err == nil {
+		*f = JSONFloat64(ff)
+		return nil
+	}
+	var s string
+	if err := json.Unmarshal(data, &s); err == nil {
+		switch s {
+		case "NaN":
+			ff = math.NaN()
+		case "Infinity":
+			ff = math.Inf(1)
+		case "-Infinity":
+			ff = math.Inf(-1)
+		default:
+			return fmt.Errorf("google.golang.org/api/internal: bad float string %q", s)
+		}
+		*f = JSONFloat64(ff)
+		return nil
+	}
+	return errors.New("google.golang.org/api/internal: data not float or string")
+}

vendor/google.golang.org/api/internal/gensupport/media.go

@@ -0,0 +1,372 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"mime"
+	"mime/multipart"
+	"net/http"
+	"net/textproto"
+	"strings"
+	"sync"
+
+	"google.golang.org/api/googleapi"
+)
+
+const sniffBuffSize = 512
+
+func newContentSniffer(r io.Reader) *contentSniffer {
+	return &contentSniffer{r: r}
+}
+
+// contentSniffer wraps a Reader, and reports the content type determined by sniffing up to 512 bytes from the Reader.
+type contentSniffer struct {
+	r     io.Reader
+	start []byte // buffer for the sniffed bytes.
+	err   error  // set to any error encountered while reading bytes to be sniffed.
+
+	ctype   string // set on first sniff.
+	sniffed bool   // set to true on first sniff.
+}
+
+func (cs *contentSniffer) Read(p []byte) (n int, err error) {
+	// Ensure that the content type is sniffed before any data is consumed from Reader.
+	_, _ = cs.ContentType()
+
+	if len(cs.start) > 0 {
+		n := copy(p, cs.start)
+		cs.start = cs.start[n:]
+		return n, nil
+	}
+
+	// We may have read some bytes into start while sniffing, even if the read ended in an error.
+	// We should first return those bytes, then the error.
+	if cs.err != nil {
+		return 0, cs.err
+	}
+
+	// Now we have handled all bytes that were buffered while sniffing.  Now just delegate to the underlying reader.
+	return cs.r.Read(p)
+}
+
+// ContentType returns the sniffed content type, and whether the content type was successfully sniffed.
+func (cs *contentSniffer) ContentType() (string, bool) {
+	if cs.sniffed {
+		return cs.ctype, cs.ctype != ""
+	}
+	cs.sniffed = true
+	// If ReadAll hits EOF, it returns err==nil.
+	cs.start, cs.err = ioutil.ReadAll(io.LimitReader(cs.r, sniffBuffSize))
+
+	// Don't try to detect the content type based on possibly incomplete data.
+	if cs.err != nil {
+		return "", false
+	}
+
+	cs.ctype = http.DetectContentType(cs.start)
+	return cs.ctype, true
+}
+
+// DetermineContentType determines the content type of the supplied reader.
+// If the content type is already known, it can be specified via ctype.
+// Otherwise, the content of media will be sniffed to determine the content type.
+// If media implements googleapi.ContentTyper (deprecated), this will be used
+// instead of sniffing the content.
+// After calling DetectContentType the caller must not perform further reads on
+// media, but rather read from the Reader that is returned.
+func DetermineContentType(media io.Reader, ctype string) (io.Reader, string) {
+	// Note: callers could avoid calling DetectContentType if ctype != "",
+	// but doing the check inside this function reduces the amount of
+	// generated code.
+	if ctype != "" {
+		return media, ctype
+	}
+
+	// For backwards compatibility, allow clients to set content
+	// type by providing a ContentTyper for media.
+	if typer, ok := media.(googleapi.ContentTyper); ok {
+		return media, typer.ContentType()
+	}
+
+	sniffer := newContentSniffer(media)
+	if ctype, ok := sniffer.ContentType(); ok {
+		return sniffer, ctype
+	}
+	// If content type could not be sniffed, reads from sniffer will eventually fail with an error.
+	return sniffer, ""
+}
+
+type typeReader struct {
+	io.Reader
+	typ string
+}
+
+// multipartReader combines the contents of multiple readers to create a multipart/related HTTP body.
+// Close must be called if reads from the multipartReader are abandoned before reaching EOF.
+type multipartReader struct {
+	pr       *io.PipeReader
+	ctype    string
+	mu       sync.Mutex
+	pipeOpen bool
+}
+
+// boundary optionally specifies the MIME boundary
+func newMultipartReader(parts []typeReader, boundary string) *multipartReader {
+	mp := &multipartReader{pipeOpen: true}
+	var pw *io.PipeWriter
+	mp.pr, pw = io.Pipe()
+	mpw := multipart.NewWriter(pw)
+	if boundary != "" {
+		mpw.SetBoundary(boundary)
+	}
+	mp.ctype = "multipart/related; boundary=" + mpw.Boundary()
+	go func() {
+		for _, part := range parts {
+			w, err := mpw.CreatePart(typeHeader(part.typ))
+			if err != nil {
+				mpw.Close()
+				pw.CloseWithError(fmt.Errorf("googleapi: CreatePart failed: %v", err))
+				return
+			}
+			_, err = io.Copy(w, part.Reader)
+			if err != nil {
+				mpw.Close()
+				pw.CloseWithError(fmt.Errorf("googleapi: Copy failed: %v", err))
+				return
+			}
+		}
+
+		mpw.Close()
+		pw.Close()
+	}()
+	return mp
+}
+
+func (mp *multipartReader) Read(data []byte) (n int, err error) {
+	return mp.pr.Read(data)
+}
+
+func (mp *multipartReader) Close() error {
+	mp.mu.Lock()
+	if !mp.pipeOpen {
+		mp.mu.Unlock()
+		return nil
+	}
+	mp.pipeOpen = false
+	mp.mu.Unlock()
+	return mp.pr.Close()
+}
+
+// CombineBodyMedia combines a json body with media content to create a multipart/related HTTP body.
+// It returns a ReadCloser containing the combined body, and the overall "multipart/related" content type, with random boundary.
+//
+// The caller must call Close on the returned ReadCloser if reads are abandoned before reaching EOF.
+func CombineBodyMedia(body io.Reader, bodyContentType string, media io.Reader, mediaContentType string) (io.ReadCloser, string) {
+	return combineBodyMedia(body, bodyContentType, media, mediaContentType, "")
+}
+
+// combineBodyMedia is CombineBodyMedia but with an optional mimeBoundary field.
+func combineBodyMedia(body io.Reader, bodyContentType string, media io.Reader, mediaContentType, mimeBoundary string) (io.ReadCloser, string) {
+	mp := newMultipartReader([]typeReader{
+		{body, bodyContentType},
+		{media, mediaContentType},
+	}, mimeBoundary)
+	return mp, mp.ctype
+}
+
+func typeHeader(contentType string) textproto.MIMEHeader {
+	h := make(textproto.MIMEHeader)
+	if contentType != "" {
+		h.Set("Content-Type", contentType)
+	}
+	return h
+}
+
+// PrepareUpload determines whether the data in the supplied reader should be
+// uploaded in a single request, or in sequential chunks.
+// chunkSize is the size of the chunk that media should be split into.
+//
+// If chunkSize is zero, media is returned as the first value, and the other
+// two return values are nil, true.
+//
+// Otherwise, a MediaBuffer is returned, along with a bool indicating whether the
+// contents of media fit in a single chunk.
+//
+// After PrepareUpload has been called, media should no longer be used: the
+// media content should be accessed via one of the return values.
+func PrepareUpload(media io.Reader, chunkSize int) (r io.Reader, mb *MediaBuffer, singleChunk bool) {
+	if chunkSize == 0 { // do not chunk
+		return media, nil, true
+	}
+	mb = NewMediaBuffer(media, chunkSize)
+	_, _, _, err := mb.Chunk()
+	// If err is io.EOF, we can upload this in a single request. Otherwise, err is
+	// either nil or a non-EOF error. If it is the latter, then the next call to
+	// mb.Chunk will return the same error. Returning a MediaBuffer ensures that this
+	// error will be handled at some point.
+	return nil, mb, err == io.EOF
+}
+
+// MediaInfo holds information for media uploads. It is intended for use by generated
+// code only.
+type MediaInfo struct {
+	// At most one of Media and MediaBuffer will be set.
+	media           io.Reader
+	buffer          *MediaBuffer
+	singleChunk     bool
+	mType           string
+	size            int64 // mediaSize, if known.  Used only for calls to progressUpdater_.
+	progressUpdater googleapi.ProgressUpdater
+}
+
+// NewInfoFromMedia should be invoked from the Media method of a call. It returns a
+// MediaInfo populated with chunk size and content type, and a reader or MediaBuffer
+// if needed.
+func NewInfoFromMedia(r io.Reader, options []googleapi.MediaOption) *MediaInfo {
+	mi := &MediaInfo{}
+	opts := googleapi.ProcessMediaOptions(options)
+	if !opts.ForceEmptyContentType {
+		r, mi.mType = DetermineContentType(r, opts.ContentType)
+	}
+	mi.media, mi.buffer, mi.singleChunk = PrepareUpload(r, opts.ChunkSize)
+	return mi
+}
+
+// NewInfoFromResumableMedia should be invoked from the ResumableMedia method of a
+// call. It returns a MediaInfo using the given reader, size and media type.
+func NewInfoFromResumableMedia(r io.ReaderAt, size int64, mediaType string) *MediaInfo {
+	rdr := ReaderAtToReader(r, size)
+	rdr, mType := DetermineContentType(rdr, mediaType)
+	return &MediaInfo{
+		size:        size,
+		mType:       mType,
+		buffer:      NewMediaBuffer(rdr, googleapi.DefaultUploadChunkSize),
+		media:       nil,
+		singleChunk: false,
+	}
+}
+
+// SetProgressUpdater sets the progress updater for the media info.
+func (mi *MediaInfo) SetProgressUpdater(pu googleapi.ProgressUpdater) {
+	if mi != nil {
+		mi.progressUpdater = pu
+	}
+}
+
+// UploadType determines the type of upload: a single request, or a resumable
+// series of requests.
+func (mi *MediaInfo) UploadType() string {
+	if mi.singleChunk {
+		return "multipart"
+	}
+	return "resumable"
+}
+
+// UploadRequest sets up an HTTP request for media upload. It adds headers
+// as necessary, and returns a replacement for the body and a function for http.Request.GetBody.
+func (mi *MediaInfo) UploadRequest(reqHeaders http.Header, body io.Reader) (newBody io.Reader, getBody func() (io.ReadCloser, error), cleanup func()) {
+	cleanup = func() {}
+	if mi == nil {
+		return body, nil, cleanup
+	}
+	var media io.Reader
+	if mi.media != nil {
+		// This only happens when the caller has turned off chunking. In that
+		// case, we write all of media in a single non-retryable request.
+		media = mi.media
+	} else if mi.singleChunk {
+		// The data fits in a single chunk, which has now been read into the MediaBuffer.
+		// We obtain that chunk so we can write it in a single request. The request can
+		// be retried because the data is stored in the MediaBuffer.
+		media, _, _, _ = mi.buffer.Chunk()
+	}
+	if media != nil {
+		fb := readerFunc(body)
+		fm := readerFunc(media)
+		combined, ctype := CombineBodyMedia(body, "application/json", media, mi.mType)
+		toCleanup := []io.Closer{
+			combined,
+		}
+		if fb != nil && fm != nil {
+			getBody = func() (io.ReadCloser, error) {
+				rb := ioutil.NopCloser(fb())
+				rm := ioutil.NopCloser(fm())
+				var mimeBoundary string
+				if _, params, err := mime.ParseMediaType(ctype); err == nil {
+					mimeBoundary = params["boundary"]
+				}
+				r, _ := combineBodyMedia(rb, "application/json", rm, mi.mType, mimeBoundary)
+				toCleanup = append(toCleanup, r)
+				return r, nil
+			}
+		}
+		cleanup = func() {
+			for _, closer := range toCleanup {
+				_ = closer.Close()
+			}
+
+		}
+		reqHeaders.Set("Content-Type", ctype)
+		body = combined
+	}
+	if mi.buffer != nil && mi.mType != "" && !mi.singleChunk {
+		reqHeaders.Set("X-Upload-Content-Type", mi.mType)
+	}
+	return body, getBody, cleanup
+}
+
+// readerFunc returns a function that always returns an io.Reader that has the same
+// contents as r, provided that can be done without consuming r. Otherwise, it
+// returns nil.
+// See http.NewRequest (in net/http/request.go).
+func readerFunc(r io.Reader) func() io.Reader {
+	switch r := r.(type) {
+	case *bytes.Buffer:
+		buf := r.Bytes()
+		return func() io.Reader { return bytes.NewReader(buf) }
+	case *bytes.Reader:
+		snapshot := *r
+		return func() io.Reader { r := snapshot; return &r }
+	case *strings.Reader:
+		snapshot := *r
+		return func() io.Reader { r := snapshot; return &r }
+	default:
+		return nil
+	}
+}
+
+// ResumableUpload returns an appropriately configured ResumableUpload value if the
+// upload is resumable, or nil otherwise.
+func (mi *MediaInfo) ResumableUpload(locURI string) *ResumableUpload {
+	if mi == nil || mi.singleChunk {
+		return nil
+	}
+	return &ResumableUpload{
+		URI:       locURI,
+		Media:     mi.buffer,
+		MediaType: mi.mType,
+		Callback: func(curr int64) {
+			if mi.progressUpdater != nil {
+				mi.progressUpdater(curr, mi.size)
+			}
+		},
+	}
+}
+
+// SetGetBody sets the GetBody field of req to f. This was once needed
+// to gracefully support Go 1.7 and earlier which didn't have that
+// field.
+//
+// Deprecated: the code generator no longer uses this as of
+// 2019-02-19. Nothing else should be calling this anyway, but we
+// won't delete this immediately; it will be deleted in as early as 6
+// months.
+func SetGetBody(req *http.Request, f func() (io.ReadCloser, error)) {
+	req.GetBody = f
+}

vendor/google.golang.org/api/internal/gensupport/params.go

@@ -0,0 +1,57 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"net/url"
+
+	"google.golang.org/api/googleapi"
+)
+
+// URLParams is a simplified replacement for url.Values
+// that safely builds up URL parameters for encoding.
+type URLParams map[string][]string
+
+// Get returns the first value for the given key, or "".
+func (u URLParams) Get(key string) string {
+	vs := u[key]
+	if len(vs) == 0 {
+		return ""
+	}
+	return vs[0]
+}
+
+// Set sets the key to value.
+// It replaces any existing values.
+func (u URLParams) Set(key, value string) {
+	u[key] = []string{value}
+}
+
+// SetMulti sets the key to an array of values.
+// It replaces any existing values.
+// Note that values must not be modified after calling SetMulti
+// so the caller is responsible for making a copy if necessary.
+func (u URLParams) SetMulti(key string, values []string) {
+	u[key] = values
+}
+
+// Encode encodes the values into ``URL encoded'' form
+// ("bar=baz&foo=quux") sorted by key.
+func (u URLParams) Encode() string {
+	return url.Values(u).Encode()
+}
+
+// SetOptions sets the URL params and any additional `CallOption` or
+// `MultiCallOption` passed in.
+func SetOptions(u URLParams, opts ...googleapi.CallOption) {
+	for _, o := range opts {
+		m, ok := o.(googleapi.MultiCallOption)
+		if ok {
+			u.SetMulti(m.GetMulti())
+			continue
+		}
+		u.Set(o.Get())
+	}
+}

vendor/google.golang.org/api/internal/gensupport/resumable.go

@@ -0,0 +1,258 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"sync"
+	"time"
+
+	gax "github.com/googleapis/gax-go/v2"
+)
+
+// Backoff is an interface around gax.Backoff's Pause method, allowing tests to provide their
+// own implementation.
+type Backoff interface {
+	Pause() time.Duration
+}
+
+// These are declared as global variables so that tests can overwrite them.
+var (
+	retryDeadline = 32 * time.Second
+	backoff       = func() Backoff {
+		return &gax.Backoff{Initial: 100 * time.Millisecond}
+	}
+	// isRetryable is a platform-specific hook, specified in retryable_linux.go
+	syscallRetryable func(error) bool = func(err error) bool { return false }
+)
+
+const (
+	// statusTooManyRequests is returned by the storage API if the
+	// per-project limits have been temporarily exceeded. The request
+	// should be retried.
+	// https://cloud.google.com/storage/docs/json_api/v1/status-codes#standardcodes
+	statusTooManyRequests = 429
+)
+
+// ResumableUpload is used by the generated APIs to provide resumable uploads.
+// It is not used by developers directly.
+type ResumableUpload struct {
+	Client *http.Client
+	// URI is the resumable resource destination provided by the server after specifying "&uploadType=resumable".
+	URI       string
+	UserAgent string // User-Agent for header of the request
+	// Media is the object being uploaded.
+	Media *MediaBuffer
+	// MediaType defines the media type, e.g. "image/jpeg".
+	MediaType string
+
+	mu       sync.Mutex // guards progress
+	progress int64      // number of bytes uploaded so far
+
+	// Callback is an optional function that will be periodically called with the cumulative number of bytes uploaded.
+	Callback func(int64)
+}
+
+// Progress returns the number of bytes uploaded at this point.
+func (rx *ResumableUpload) Progress() int64 {
+	rx.mu.Lock()
+	defer rx.mu.Unlock()
+	return rx.progress
+}
+
+// doUploadRequest performs a single HTTP request to upload data.
+// off specifies the offset in rx.Media from which data is drawn.
+// size is the number of bytes in data.
+// final specifies whether data is the final chunk to be uploaded.
+func (rx *ResumableUpload) doUploadRequest(ctx context.Context, data io.Reader, off, size int64, final bool) (*http.Response, error) {
+	req, err := http.NewRequest("POST", rx.URI, data)
+	if err != nil {
+		return nil, err
+	}
+
+	req.ContentLength = size
+	var contentRange string
+	if final {
+		if size == 0 {
+			contentRange = fmt.Sprintf("bytes */%v", off)
+		} else {
+			contentRange = fmt.Sprintf("bytes %v-%v/%v", off, off+size-1, off+size)
+		}
+	} else {
+		contentRange = fmt.Sprintf("bytes %v-%v/*", off, off+size-1)
+	}
+	req.Header.Set("Content-Range", contentRange)
+	req.Header.Set("Content-Type", rx.MediaType)
+	req.Header.Set("User-Agent", rx.UserAgent)
+
+	// Google's upload endpoint uses status code 308 for a
+	// different purpose than the "308 Permanent Redirect"
+	// since-standardized in RFC 7238. Because of the conflict in
+	// semantics, Google added this new request header which
+	// causes it to not use "308" and instead reply with 200 OK
+	// and sets the upload-specific "X-HTTP-Status-Code-Override:
+	// 308" response header.
+	req.Header.Set("X-GUploader-No-308", "yes")
+
+	return SendRequest(ctx, rx.Client, req)
+}
+
+func statusResumeIncomplete(resp *http.Response) bool {
+	// This is how the server signals "status resume incomplete"
+	// when X-GUploader-No-308 is set to "yes":
+	return resp != nil && resp.Header.Get("X-Http-Status-Code-Override") == "308"
+}
+
+// reportProgress calls a user-supplied callback to report upload progress.
+// If old==updated, the callback is not called.
+func (rx *ResumableUpload) reportProgress(old, updated int64) {
+	if updated-old == 0 {
+		return
+	}
+	rx.mu.Lock()
+	rx.progress = updated
+	rx.mu.Unlock()
+	if rx.Callback != nil {
+		rx.Callback(updated)
+	}
+}
+
+// transferChunk performs a single HTTP request to upload a single chunk from rx.Media.
+func (rx *ResumableUpload) transferChunk(ctx context.Context) (*http.Response, error) {
+	chunk, off, size, err := rx.Media.Chunk()
+
+	done := err == io.EOF
+	if !done && err != nil {
+		return nil, err
+	}
+
+	res, err := rx.doUploadRequest(ctx, chunk, off, int64(size), done)
+	if err != nil {
+		return res, err
+	}
+
+	// We sent "X-GUploader-No-308: yes" (see comment elsewhere in
+	// this file), so we don't expect to get a 308.
+	if res.StatusCode == 308 {
+		return nil, errors.New("unexpected 308 response status code")
+	}
+
+	if res.StatusCode == http.StatusOK {
+		rx.reportProgress(off, off+int64(size))
+	}
+
+	if statusResumeIncomplete(res) {
+		rx.Media.Next()
+	}
+	return res, nil
+}
+
+// Upload starts the process of a resumable upload with a cancellable context.
+// It retries using the provided back off strategy until cancelled or the
+// strategy indicates to stop retrying.
+// It is called from the auto-generated API code and is not visible to the user.
+// Before sending an HTTP request, Upload calls any registered hook functions,
+// and calls the returned functions after the request returns (see send.go).
+// rx is private to the auto-generated API code.
+// Exactly one of resp or err will be nil.  If resp is non-nil, the caller must call resp.Body.Close.
+func (rx *ResumableUpload) Upload(ctx context.Context) (resp *http.Response, err error) {
+
+	// There are a couple of cases where it's possible for err and resp to both
+	// be non-nil. However, we expose a simpler contract to our callers: exactly
+	// one of resp and err will be non-nil. This means that any response body
+	// must be closed here before returning a non-nil error.
+	var prepareReturn = func(resp *http.Response, err error) (*http.Response, error) {
+		if err != nil {
+			if resp != nil && resp.Body != nil {
+				resp.Body.Close()
+			}
+			return nil, err
+		}
+		return resp, nil
+	}
+
+	// Send all chunks.
+	for {
+		var pause time.Duration
+
+		// Each chunk gets its own initialized-at-zero retry.
+		bo := backoff()
+		quitAfter := time.After(retryDeadline)
+
+		// Retry loop for a single chunk.
+		for {
+			select {
+			case <-ctx.Done():
+				if err == nil {
+					err = ctx.Err()
+				}
+				return prepareReturn(resp, err)
+			case <-time.After(pause):
+			case <-quitAfter:
+				return prepareReturn(resp, err)
+			}
+
+			resp, err = rx.transferChunk(ctx)
+
+			var status int
+			if resp != nil {
+				status = resp.StatusCode
+			}
+
+			// Check if we should retry the request.
+			if !shouldRetry(status, err) {
+				break
+			}
+
+			pause = bo.Pause()
+			if resp != nil && resp.Body != nil {
+				resp.Body.Close()
+			}
+		}
+
+		// If the chunk was uploaded successfully, but there's still
+		// more to go, upload the next chunk without any delay.
+		if statusResumeIncomplete(resp) {
+			resp.Body.Close()
+			continue
+		}
+
+		return prepareReturn(resp, err)
+	}
+}
+
+// shouldRetry indicates whether an error is retryable for the purposes of this
+// package, following guidance from
+// https://cloud.google.com/storage/docs/exponential-backoff .
+func shouldRetry(status int, err error) bool {
+	if 500 <= status && status <= 599 {
+		return true
+	}
+	if status == statusTooManyRequests {
+		return true
+	}
+	if err == io.ErrUnexpectedEOF {
+		return true
+	}
+	// Transient network errors should be retried.
+	if syscallRetryable(err) {
+		return true
+	}
+	if err, ok := err.(interface{ Temporary() bool }); ok {
+		if err.Temporary() {
+			return true
+		}
+	}
+	// If Go 1.13 error unwrapping is available, use this to examine wrapped
+	// errors.
+	if err, ok := err.(interface{ Unwrap() error }); ok {
+		return shouldRetry(status, err.Unwrap())
+	}
+	return false
+}

vendor/google.golang.org/api/internal/gensupport/retryable_linux.go

@@ -0,0 +1,16 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package gensupport
+
+import "syscall"
+
+func init() {
+	// Initialize syscallRetryable to return true on transient socket-level
+	// errors. These errors are specific to Linux.
+	syscallRetryable = func(err error) bool { return err == syscall.ECONNRESET || err == syscall.ECONNREFUSED }
+}

vendor/google.golang.org/api/internal/gensupport/send.go

@@ -0,0 +1,123 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"time"
+)
+
+// SendRequest sends a single HTTP request using the given client.
+// If ctx is non-nil, it calls all hooks, then sends the request with
+// req.WithContext, then calls any functions returned by the hooks in
+// reverse order.
+func SendRequest(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	// Disallow Accept-Encoding because it interferes with the automatic gzip handling
+	// done by the default http.Transport. See https://github.com/google/google-api-go-client/issues/219.
+	if _, ok := req.Header["Accept-Encoding"]; ok {
+		return nil, errors.New("google api: custom Accept-Encoding headers not allowed")
+	}
+	if ctx == nil {
+		return client.Do(req)
+	}
+	return send(ctx, client, req)
+}
+
+func send(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	if client == nil {
+		client = http.DefaultClient
+	}
+	resp, err := client.Do(req.WithContext(ctx))
+	// If we got an error, and the context has been canceled,
+	// the context's error is probably more useful.
+	if err != nil {
+		select {
+		case <-ctx.Done():
+			err = ctx.Err()
+		default:
+		}
+	}
+	return resp, err
+}
+
+// SendRequestWithRetry sends a single HTTP request using the given client,
+// with retries if a retryable error is returned.
+// If ctx is non-nil, it calls all hooks, then sends the request with
+// req.WithContext, then calls any functions returned by the hooks in
+// reverse order.
+func SendRequestWithRetry(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	// Disallow Accept-Encoding because it interferes with the automatic gzip handling
+	// done by the default http.Transport. See https://github.com/google/google-api-go-client/issues/219.
+	if _, ok := req.Header["Accept-Encoding"]; ok {
+		return nil, errors.New("google api: custom Accept-Encoding headers not allowed")
+	}
+	if ctx == nil {
+		return client.Do(req)
+	}
+	return sendAndRetry(ctx, client, req)
+}
+
+func sendAndRetry(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
+	if client == nil {
+		client = http.DefaultClient
+	}
+
+	var resp *http.Response
+	var err error
+
+	// Loop to retry the request, up to the context deadline.
+	var pause time.Duration
+	bo := backoff()
+
+	for {
+		select {
+		case <-ctx.Done():
+			// If we got an error, and the context has been canceled,
+			// the context's error is probably more useful.
+			if err == nil {
+				err = ctx.Err()
+			}
+			return resp, err
+		case <-time.After(pause):
+		}
+
+		resp, err = client.Do(req.WithContext(ctx))
+
+		var status int
+		if resp != nil {
+			status = resp.StatusCode
+		}
+
+		// Check if we can retry the request. A retry can only be done if the error
+		// is retryable and the request body can be re-created using GetBody (this
+		// will not be possible if the body was unbuffered).
+		if req.GetBody == nil || !shouldRetry(status, err) {
+			break
+		}
+		var errBody error
+		req.Body, errBody = req.GetBody()
+		if errBody != nil {
+			break
+		}
+
+		pause = bo.Pause()
+		if resp != nil && resp.Body != nil {
+			resp.Body.Close()
+		}
+	}
+	return resp, err
+}
+
+// DecodeResponse decodes the body of res into target. If there is no body,
+// target is unchanged.
+func DecodeResponse(target interface{}, res *http.Response) error {
+	if res.StatusCode == http.StatusNoContent {
+		return nil
+	}
+	return json.NewDecoder(res.Body).Decode(target)
+}

vendor/google.golang.org/api/internal/gensupport/version.go

@@ -0,0 +1,53 @@
+// Copyright 2020 Google LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gensupport
+
+import (
+	"runtime"
+	"strings"
+	"unicode"
+)
+
+// GoVersion returns the Go runtime version. The returned string
+// has no whitespace.
+func GoVersion() string {
+	return goVersion
+}
+
+var goVersion = goVer(runtime.Version())
+
+const develPrefix = "devel +"
+
+func goVer(s string) string {
+	if strings.HasPrefix(s, develPrefix) {
+		s = s[len(develPrefix):]
+		if p := strings.IndexFunc(s, unicode.IsSpace); p >= 0 {
+			s = s[:p]
+		}
+		return s
+	}
+
+	if strings.HasPrefix(s, "go1") {
+		s = s[2:]
+		var prerelease string
+		if p := strings.IndexFunc(s, notSemverRune); p >= 0 {
+			s, prerelease = s[:p], s[p:]
+		}
+		if strings.HasSuffix(s, ".") {
+			s += "0"
+		} else if strings.Count(s, ".") < 2 {
+			s += ".0"
+		}
+		if prerelease != "" {
+			s += "-" + prerelease
+		}
+		return s
+	}
+	return ""
+}
+
+func notSemverRune(r rune) bool {
+	return !strings.ContainsRune("0123456789.", r)
+}

vendor/google.golang.org/api/internal/impersonate/impersonate.go

@@ -0,0 +1,128 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package impersonate is used to impersonate Google Credentials.
+package impersonate
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"golang.org/x/oauth2"
+)
+
+// Config for generating impersonated credentials.
+type Config struct {
+	// Target is the service account to impersonate. Required.
+	Target string
+	// Scopes the impersonated credential should have. Required.
+	Scopes []string
+	// Delegates are the service accounts in a delegation chain. Each service
+	// account must be granted roles/iam.serviceAccountTokenCreator on the next
+	// service account in the chain. Optional.
+	Delegates []string
+}
+
+// TokenSource returns an impersonated TokenSource configured with the provided
+// config using ts as the base credential provider for making requests.
+func TokenSource(ctx context.Context, ts oauth2.TokenSource, config *Config) (oauth2.TokenSource, error) {
+	if len(config.Scopes) == 0 {
+		return nil, fmt.Errorf("impersonate: scopes must be provided")
+	}
+	its := impersonatedTokenSource{
+		ctx:  ctx,
+		ts:   ts,
+		name: formatIAMServiceAccountName(config.Target),
+		// Default to the longest acceptable value of one hour as the token will
+		// be refreshed automatically.
+		lifetime: "3600s",
+	}
+
+	its.delegates = make([]string, len(config.Delegates))
+	for i, v := range config.Delegates {
+		its.delegates[i] = formatIAMServiceAccountName(v)
+	}
+	its.scopes = make([]string, len(config.Scopes))
+	copy(its.scopes, config.Scopes)
+
+	return oauth2.ReuseTokenSource(nil, its), nil
+}
+
+func formatIAMServiceAccountName(name string) string {
+	return fmt.Sprintf("projects/-/serviceAccounts/%s", name)
+}
+
+type generateAccessTokenReq struct {
+	Delegates []string `json:"delegates,omitempty"`
+	Lifetime  string   `json:"lifetime,omitempty"`
+	Scope     []string `json:"scope,omitempty"`
+}
+
+type generateAccessTokenResp struct {
+	AccessToken string `json:"accessToken"`
+	ExpireTime  string `json:"expireTime"`
+}
+
+type impersonatedTokenSource struct {
+	ctx context.Context
+	ts  oauth2.TokenSource
+
+	name      string
+	lifetime  string
+	scopes    []string
+	delegates []string
+}
+
+// Token returns an impersonated Token.
+func (i impersonatedTokenSource) Token() (*oauth2.Token, error) {
+	hc := oauth2.NewClient(i.ctx, i.ts)
+	reqBody := generateAccessTokenReq{
+		Delegates: i.delegates,
+		Lifetime:  i.lifetime,
+		Scope:     i.scopes,
+	}
+	b, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("impersonate: unable to marshal request: %v", err)
+	}
+	url := fmt.Sprintf("https://iamcredentials.googleapis.com/v1/%s:generateAccessToken", i.name)
+	req, err := http.NewRequest("POST", url, bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("impersonate: unable to create request: %v", err)
+	}
+	req = req.WithContext(i.ctx)
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := hc.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("impersonate: unable to generate access token: %v", err)
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
+	if err != nil {
+		return nil, fmt.Errorf("impersonate: unable to read body: %v", err)
+	}
+	if c := resp.StatusCode; c < 200 || c > 299 {
+		return nil, fmt.Errorf("impersonate: status code %d: %s", c, body)
+	}
+
+	var accessTokenResp generateAccessTokenResp
+	if err := json.Unmarshal(body, &accessTokenResp); err != nil {
+		return nil, fmt.Errorf("impersonate: unable to parse response: %v", err)
+	}
+	expiry, err := time.Parse(time.RFC3339, accessTokenResp.ExpireTime)
+	if err != nil {
+		return nil, fmt.Errorf("impersonate: unable to parse expiry: %v", err)
+	}
+	return &oauth2.Token{
+		AccessToken: accessTokenResp.AccessToken,
+		Expiry:      expiry,
+	}, nil
+}

vendor/google.golang.org/api/internal/settings.go

@@ -0,0 +1,142 @@
+// Copyright 2017 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package internal supports the options and transport packages.
+package internal
+
+import (
+	"crypto/tls"
+	"errors"
+	"net/http"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal/impersonate"
+	"google.golang.org/grpc"
+)
+
+// DialSettings holds information needed to establish a connection with a
+// Google API service.
+type DialSettings struct {
+	Endpoint                      string
+	DefaultEndpoint               string
+	DefaultMTLSEndpoint           string
+	Scopes                        []string
+	DefaultScopes                 []string
+	EnableJwtWithScope            bool
+	TokenSource                   oauth2.TokenSource
+	Credentials                   *google.Credentials
+	CredentialsFile               string // if set, Token Source is ignored.
+	CredentialsJSON               []byte
+	InternalCredentials           *google.Credentials
+	UserAgent                     string
+	APIKey                        string
+	Audiences                     []string
+	DefaultAudience               string
+	HTTPClient                    *http.Client
+	GRPCDialOpts                  []grpc.DialOption
+	GRPCConn                      *grpc.ClientConn
+	GRPCConnPool                  ConnPool
+	GRPCConnPoolSize              int
+	NoAuth                        bool
+	TelemetryDisabled             bool
+	ClientCertSource              func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+	CustomClaims                  map[string]interface{}
+	SkipValidation                bool
+	ImpersonationConfig           *impersonate.Config
+	EnableDirectPath              bool
+	AllowNonDefaultServiceAccount bool
+
+	// Google API system parameters. For more information please read:
+	// https://cloud.google.com/apis/docs/system-parameters
+	QuotaProject  string
+	RequestReason string
+}
+
+// GetScopes returns the user-provided scopes, if set, or else falls back to the
+// default scopes.
+func (ds *DialSettings) GetScopes() []string {
+	if len(ds.Scopes) > 0 {
+		return ds.Scopes
+	}
+	return ds.DefaultScopes
+}
+
+// GetAudience returns the user-provided audience, if set, or else falls back to the default audience.
+func (ds *DialSettings) GetAudience() string {
+	if ds.HasCustomAudience() {
+		return ds.Audiences[0]
+	}
+	return ds.DefaultAudience
+}
+
+// HasCustomAudience returns true if a custom audience is provided by users.
+func (ds *DialSettings) HasCustomAudience() bool {
+	return len(ds.Audiences) > 0
+}
+
+// Validate reports an error if ds is invalid.
+func (ds *DialSettings) Validate() error {
+	if ds.SkipValidation {
+		return nil
+	}
+	hasCreds := ds.APIKey != "" || ds.TokenSource != nil || ds.CredentialsFile != "" || ds.Credentials != nil
+	if ds.NoAuth && hasCreds {
+		return errors.New("options.WithoutAuthentication is incompatible with any option that provides credentials")
+	}
+	// Credentials should not appear with other options.
+	// We currently allow TokenSource and CredentialsFile to coexist.
+	// TODO(jba): make TokenSource & CredentialsFile an error (breaking change).
+	nCreds := 0
+	if ds.Credentials != nil {
+		nCreds++
+	}
+	if ds.CredentialsJSON != nil {
+		nCreds++
+	}
+	if ds.CredentialsFile != "" {
+		nCreds++
+	}
+	if ds.APIKey != "" {
+		nCreds++
+	}
+	if ds.TokenSource != nil {
+		nCreds++
+	}
+	if len(ds.Scopes) > 0 && len(ds.Audiences) > 0 {
+		return errors.New("WithScopes is incompatible with WithAudience")
+	}
+	// Accept only one form of credentials, except we allow TokenSource and CredentialsFile for backwards compatibility.
+	if nCreds > 1 && !(nCreds == 2 && ds.TokenSource != nil && ds.CredentialsFile != "") {
+		return errors.New("multiple credential options provided")
+	}
+	if ds.GRPCConn != nil && ds.GRPCConnPool != nil {
+		return errors.New("WithGRPCConn is incompatible with WithConnPool")
+	}
+	if ds.HTTPClient != nil && ds.GRPCConnPool != nil {
+		return errors.New("WithHTTPClient is incompatible with WithConnPool")
+	}
+	if ds.HTTPClient != nil && ds.GRPCConn != nil {
+		return errors.New("WithHTTPClient is incompatible with WithGRPCConn")
+	}
+	if ds.HTTPClient != nil && ds.GRPCDialOpts != nil {
+		return errors.New("WithHTTPClient is incompatible with gRPC dial options")
+	}
+	if ds.HTTPClient != nil && ds.QuotaProject != "" {
+		return errors.New("WithHTTPClient is incompatible with QuotaProject")
+	}
+	if ds.HTTPClient != nil && ds.RequestReason != "" {
+		return errors.New("WithHTTPClient is incompatible with RequestReason")
+	}
+	if ds.HTTPClient != nil && ds.ClientCertSource != nil {
+		return errors.New("WithHTTPClient is incompatible with WithClientCertSource")
+	}
+	if ds.ClientCertSource != nil && (ds.GRPCConn != nil || ds.GRPCConnPool != nil || ds.GRPCConnPoolSize != 0 || ds.GRPCDialOpts != nil) {
+		return errors.New("WithClientCertSource is currently only supported for HTTP. gRPC settings are incompatible")
+	}
+	if ds.ImpersonationConfig != nil && len(ds.ImpersonationConfig.Scopes) == 0 && len(ds.Scopes) == 0 {
+		return errors.New("WithImpersonatedCredentials requires scopes being provided")
+	}
+	return nil
+}

vendor/google.golang.org/api/internal/third_party/uritemplates/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2013 Joshua Tacoma. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/google.golang.org/api/internal/third_party/uritemplates/METADATA

@@ -0,0 +1,14 @@
+name: "uritemplates"
+description:
+    "Package uritemplates is a level 4 implementation of RFC 6570 (URI "
+    "Template, http://tools.ietf.org/html/rfc6570)."
+
+third_party {
+  url {
+    type: GIT
+    value: "https://github.com/jtacoma/uritemplates"
+  }
+  version: "0.1"
+  last_upgrade_date { year: 2014 month: 8 day: 18 }
+  license_type: NOTICE
+}

vendor/google.golang.org/api/internal/third_party/uritemplates/uritemplates.go

@@ -0,0 +1,248 @@
+// Copyright 2013 Joshua Tacoma. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package uritemplates is a level 3 implementation of RFC 6570 (URI
+// Template, http://tools.ietf.org/html/rfc6570).
+// uritemplates does not support composite values (in Go: slices or maps)
+// and so does not qualify as a level 4 implementation.
+package uritemplates
+
+import (
+	"bytes"
+	"errors"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var (
+	unreserved = regexp.MustCompile("[^A-Za-z0-9\\-._~]")
+	reserved   = regexp.MustCompile("[^A-Za-z0-9\\-._~:/?#[\\]@!$&'()*+,;=]")
+	validname  = regexp.MustCompile("^([A-Za-z0-9_\\.]|%[0-9A-Fa-f][0-9A-Fa-f])+$")
+	hex        = []byte("0123456789ABCDEF")
+)
+
+func pctEncode(src []byte) []byte {
+	dst := make([]byte, len(src)*3)
+	for i, b := range src {
+		buf := dst[i*3 : i*3+3]
+		buf[0] = 0x25
+		buf[1] = hex[b/16]
+		buf[2] = hex[b%16]
+	}
+	return dst
+}
+
+// pairWriter is a convenience struct which allows escaped and unescaped
+// versions of the template to be written in parallel.
+type pairWriter struct {
+	escaped, unescaped bytes.Buffer
+}
+
+// Write writes the provided string directly without any escaping.
+func (w *pairWriter) Write(s string) {
+	w.escaped.WriteString(s)
+	w.unescaped.WriteString(s)
+}
+
+// Escape writes the provided string, escaping the string for the
+// escaped output.
+func (w *pairWriter) Escape(s string, allowReserved bool) {
+	w.unescaped.WriteString(s)
+	if allowReserved {
+		w.escaped.Write(reserved.ReplaceAllFunc([]byte(s), pctEncode))
+	} else {
+		w.escaped.Write(unreserved.ReplaceAllFunc([]byte(s), pctEncode))
+	}
+}
+
+// Escaped returns the escaped string.
+func (w *pairWriter) Escaped() string {
+	return w.escaped.String()
+}
+
+// Unescaped returns the unescaped string.
+func (w *pairWriter) Unescaped() string {
+	return w.unescaped.String()
+}
+
+// A uriTemplate is a parsed representation of a URI template.
+type uriTemplate struct {
+	raw   string
+	parts []templatePart
+}
+
+// parse parses a URI template string into a uriTemplate object.
+func parse(rawTemplate string) (*uriTemplate, error) {
+	split := strings.Split(rawTemplate, "{")
+	parts := make([]templatePart, len(split)*2-1)
+	for i, s := range split {
+		if i == 0 {
+			if strings.Contains(s, "}") {
+				return nil, errors.New("unexpected }")
+			}
+			parts[i].raw = s
+			continue
+		}
+		subsplit := strings.Split(s, "}")
+		if len(subsplit) != 2 {
+			return nil, errors.New("malformed template")
+		}
+		expression := subsplit[0]
+		var err error
+		parts[i*2-1], err = parseExpression(expression)
+		if err != nil {
+			return nil, err
+		}
+		parts[i*2].raw = subsplit[1]
+	}
+	return &uriTemplate{
+		raw:   rawTemplate,
+		parts: parts,
+	}, nil
+}
+
+type templatePart struct {
+	raw           string
+	terms         []templateTerm
+	first         string
+	sep           string
+	named         bool
+	ifemp         string
+	allowReserved bool
+}
+
+type templateTerm struct {
+	name     string
+	explode  bool
+	truncate int
+}
+
+func parseExpression(expression string) (result templatePart, err error) {
+	switch expression[0] {
+	case '+':
+		result.sep = ","
+		result.allowReserved = true
+		expression = expression[1:]
+	case '.':
+		result.first = "."
+		result.sep = "."
+		expression = expression[1:]
+	case '/':
+		result.first = "/"
+		result.sep = "/"
+		expression = expression[1:]
+	case ';':
+		result.first = ";"
+		result.sep = ";"
+		result.named = true
+		expression = expression[1:]
+	case '?':
+		result.first = "?"
+		result.sep = "&"
+		result.named = true
+		result.ifemp = "="
+		expression = expression[1:]
+	case '&':
+		result.first = "&"
+		result.sep = "&"
+		result.named = true
+		result.ifemp = "="
+		expression = expression[1:]
+	case '#':
+		result.first = "#"
+		result.sep = ","
+		result.allowReserved = true
+		expression = expression[1:]
+	default:
+		result.sep = ","
+	}
+	rawterms := strings.Split(expression, ",")
+	result.terms = make([]templateTerm, len(rawterms))
+	for i, raw := range rawterms {
+		result.terms[i], err = parseTerm(raw)
+		if err != nil {
+			break
+		}
+	}
+	return result, err
+}
+
+func parseTerm(term string) (result templateTerm, err error) {
+	// TODO(djd): Remove "*" suffix parsing once we check that no APIs have
+	// mistakenly used that attribute.
+	if strings.HasSuffix(term, "*") {
+		result.explode = true
+		term = term[:len(term)-1]
+	}
+	split := strings.Split(term, ":")
+	if len(split) == 1 {
+		result.name = term
+	} else if len(split) == 2 {
+		result.name = split[0]
+		var parsed int64
+		parsed, err = strconv.ParseInt(split[1], 10, 0)
+		result.truncate = int(parsed)
+	} else {
+		err = errors.New("multiple colons in same term")
+	}
+	if !validname.MatchString(result.name) {
+		err = errors.New("not a valid name: " + result.name)
+	}
+	if result.explode && result.truncate > 0 {
+		err = errors.New("both explode and prefix modifiers on same term")
+	}
+	return result, err
+}
+
+// Expand expands a URI template with a set of values to produce the
+// resultant URI. Two forms of the result are returned: one with all the
+// elements escaped, and one with the elements unescaped.
+func (t *uriTemplate) Expand(values map[string]string) (escaped, unescaped string) {
+	var w pairWriter
+	for _, p := range t.parts {
+		p.expand(&w, values)
+	}
+	return w.Escaped(), w.Unescaped()
+}
+
+func (tp *templatePart) expand(w *pairWriter, values map[string]string) {
+	if len(tp.raw) > 0 {
+		w.Write(tp.raw)
+		return
+	}
+	var first = true
+	for _, term := range tp.terms {
+		value, exists := values[term.name]
+		if !exists {
+			continue
+		}
+		if first {
+			w.Write(tp.first)
+			first = false
+		} else {
+			w.Write(tp.sep)
+		}
+		tp.expandString(w, term, value)
+	}
+}
+
+func (tp *templatePart) expandName(w *pairWriter, name string, empty bool) {
+	if tp.named {
+		w.Write(name)
+		if empty {
+			w.Write(tp.ifemp)
+		} else {
+			w.Write("=")
+		}
+	}
+}
+
+func (tp *templatePart) expandString(w *pairWriter, t templateTerm, s string) {
+	if len(s) > t.truncate && t.truncate > 0 {
+		s = s[:t.truncate]
+	}
+	tp.expandName(w, t.name, len(s) == 0)
+	w.Escape(s, tp.allowReserved)
+}

vendor/google.golang.org/api/internal/third_party/uritemplates/utils.go

@@ -0,0 +1,17 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uritemplates
+
+// Expand parses then expands a URI template with a set of values to produce
+// the resultant URI. Two forms of the result are returned: one with all the
+// elements escaped, and one with the elements unescaped.
+func Expand(path string, values map[string]string) (escaped, unescaped string, err error) {
+	template, err := parse(path)
+	if err != nil {
+		return "", "", err
+	}
+	escaped, unescaped = template.Expand(values)
+	return escaped, unescaped, nil
+}

vendor/google.golang.org/api/oauth2/v2/oauth2-api.json

@@ -0,0 +1,234 @@
+{
+  "auth": {
+    "oauth2": {
+      "scopes": {
+        "https://www.googleapis.com/auth/userinfo.email": {
+          "description": "View your email address"
+        },
+        "https://www.googleapis.com/auth/userinfo.profile": {
+          "description": "See your personal info, including any personal info you've made publicly available"
+        },
+        "openid": {
+          "description": "Associate you with your personal info on Google"
+        }
+      }
+    }
+  },
+  "basePath": "/",
+  "baseUrl": "https://www.googleapis.com/",
+  "batchPath": "batch/oauth2/v2",
+  "description": "Obtains end-user authorization grants for use with other Google APIs.",
+  "discoveryVersion": "v1",
+  "documentationLink": "https://developers.google.com/identity/protocols/oauth2/",
+  "etag": "\"u9GIe6H63LSGq-9_t39K2Zx_EAc/VCyF6WfWVwIuhIs_gw3LA4B3w1E\"",
+  "icons": {
+    "x16": "https://www.gstatic.com/images/branding/product/1x/googleg_16dp.png",
+    "x32": "https://www.gstatic.com/images/branding/product/1x/googleg_32dp.png"
+  },
+  "id": "oauth2:v2",
+  "kind": "discovery#restDescription",
+  "methods": {
+    "tokeninfo": {
+      "httpMethod": "POST",
+      "id": "oauth2.tokeninfo",
+      "parameters": {
+        "access_token": {
+          "location": "query",
+          "type": "string"
+        },
+        "id_token": {
+          "location": "query",
+          "type": "string"
+        }
+      },
+      "path": "oauth2/v2/tokeninfo",
+      "response": {
+        "$ref": "Tokeninfo"
+      }
+    }
+  },
+  "name": "oauth2",
+  "ownerDomain": "google.com",
+  "ownerName": "Google",
+  "parameters": {
+    "alt": {
+      "default": "json",
+      "description": "Data format for the response.",
+      "enum": [
+        "json"
+      ],
+      "enumDescriptions": [
+        "Responses with Content-Type of application/json"
+      ],
+      "location": "query",
+      "type": "string"
+    },
+    "fields": {
+      "description": "Selector specifying which fields to include in a partial response.",
+      "location": "query",
+      "type": "string"
+    },
+    "key": {
+      "description": "API key. Your API key identifies your project and provides you with API access, quota, and reports. Required unless you provide an OAuth 2.0 token.",
+      "location": "query",
+      "type": "string"
+    },
+    "oauth_token": {
+      "description": "OAuth 2.0 token for the current user.",
+      "location": "query",
+      "type": "string"
+    },
+    "prettyPrint": {
+      "default": "true",
+      "description": "Returns response with indentations and line breaks.",
+      "location": "query",
+      "type": "boolean"
+    },
+    "quotaUser": {
+      "description": "An opaque string that represents a user for quota purposes. Must not exceed 40 characters.",
+      "location": "query",
+      "type": "string"
+    },
+    "userIp": {
+      "description": "Deprecated. Please use quotaUser instead.",
+      "location": "query",
+      "type": "string"
+    }
+  },
+  "protocol": "rest",
+  "resources": {
+    "userinfo": {
+      "methods": {
+        "get": {
+          "httpMethod": "GET",
+          "id": "oauth2.userinfo.get",
+          "path": "oauth2/v2/userinfo",
+          "response": {
+            "$ref": "Userinfo"
+          },
+          "scopes": [
+            "openid",
+            "https://www.googleapis.com/auth/userinfo.email",
+            "https://www.googleapis.com/auth/userinfo.profile"
+          ]
+        }
+      },
+      "resources": {
+        "v2": {
+          "resources": {
+            "me": {
+              "methods": {
+                "get": {
+                  "httpMethod": "GET",
+                  "id": "oauth2.userinfo.v2.me.get",
+                  "path": "userinfo/v2/me",
+                  "response": {
+                    "$ref": "Userinfo"
+                  },
+                  "scopes": [
+                    "openid",
+                    "https://www.googleapis.com/auth/userinfo.email",
+                    "https://www.googleapis.com/auth/userinfo.profile"
+                  ]
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "revision": "20200213",
+  "rootUrl": "https://www.googleapis.com/",
+  "schemas": {
+    "Tokeninfo": {
+      "id": "Tokeninfo",
+      "properties": {
+        "audience": {
+          "description": "Who is the intended audience for this token. In general the same as issued_to.",
+          "type": "string"
+        },
+        "email": {
+          "description": "The email address of the user. Present only if the email scope is present in the request.",
+          "type": "string"
+        },
+        "expires_in": {
+          "description": "The expiry time of the token, as number of seconds left until expiry.",
+          "format": "int32",
+          "type": "integer"
+        },
+        "issued_to": {
+          "description": "To whom was the token issued to. In general the same as audience.",
+          "type": "string"
+        },
+        "scope": {
+          "description": "The space separated list of scopes granted to this token.",
+          "type": "string"
+        },
+        "user_id": {
+          "description": "The obfuscated user id.",
+          "type": "string"
+        },
+        "verified_email": {
+          "description": "Boolean flag which is true if the email address is verified. Present only if the email scope is present in the request.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    },
+    "Userinfo": {
+      "id": "Userinfo",
+      "properties": {
+        "email": {
+          "description": "The user's email address.",
+          "type": "string"
+        },
+        "family_name": {
+          "description": "The user's last name.",
+          "type": "string"
+        },
+        "gender": {
+          "description": "The user's gender.",
+          "type": "string"
+        },
+        "given_name": {
+          "description": "The user's first name.",
+          "type": "string"
+        },
+        "hd": {
+          "description": "The hosted domain e.g. example.com if the user is Google apps user.",
+          "type": "string"
+        },
+        "id": {
+          "description": "The obfuscated ID of the user.",
+          "type": "string"
+        },
+        "link": {
+          "description": "URL of the profile page.",
+          "type": "string"
+        },
+        "locale": {
+          "description": "The user's preferred locale.",
+          "type": "string"
+        },
+        "name": {
+          "description": "The user's full name.",
+          "type": "string"
+        },
+        "picture": {
+          "description": "URL of the user's picture image.",
+          "type": "string"
+        },
+        "verified_email": {
+          "default": "true",
+          "description": "Boolean flag which is true if the email address is verified. Always verified because we only return the user's primary email address.",
+          "type": "boolean"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "servicePath": "",
+  "title": "Google OAuth2 API",
+  "version": "v2"
+}

vendor/google.golang.org/api/oauth2/v2/oauth2-gen.go

@@ -0,0 +1,684 @@
+// Copyright 2021 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Code generated file. DO NOT EDIT.
+
+// Package oauth2 provides access to the Google OAuth2 API.
+//
+// For product documentation, see: https://developers.google.com/identity/protocols/oauth2/
+//
+// Creating a client
+//
+// Usage example:
+//
+//   import "google.golang.org/api/oauth2/v2"
+//   ...
+//   ctx := context.Background()
+//   oauth2Service, err := oauth2.NewService(ctx)
+//
+// In this example, Google Application Default Credentials are used for authentication.
+//
+// For information on how to create and obtain Application Default Credentials, see https://developers.google.com/identity/protocols/application-default-credentials.
+//
+// Other authentication options
+//
+// By default, all available scopes (see "Constants") are used to authenticate. To restrict scopes, use option.WithScopes:
+//
+//   oauth2Service, err := oauth2.NewService(ctx, option.WithScopes(oauth2.OpenIDScope))
+//
+// To use an API key for authentication (note: some APIs do not support API keys), use option.WithAPIKey:
+//
+//   oauth2Service, err := oauth2.NewService(ctx, option.WithAPIKey("AIza..."))
+//
+// To use an OAuth token (e.g., a user token obtained via a three-legged OAuth flow), use option.WithTokenSource:
+//
+//   config := &oauth2.Config{...}
+//   // ...
+//   token, err := config.Exchange(ctx, ...)
+//   oauth2Service, err := oauth2.NewService(ctx, option.WithTokenSource(config.TokenSource(ctx, token)))
+//
+// See https://godoc.org/google.golang.org/api/option/ for details on options.
+package oauth2 // import "google.golang.org/api/oauth2/v2"
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+
+	googleapi "google.golang.org/api/googleapi"
+	gensupport "google.golang.org/api/internal/gensupport"
+	option "google.golang.org/api/option"
+	internaloption "google.golang.org/api/option/internaloption"
+	htransport "google.golang.org/api/transport/http"
+)
+
+// Always reference these packages, just in case the auto-generated code
+// below doesn't.
+var _ = bytes.NewBuffer
+var _ = strconv.Itoa
+var _ = fmt.Sprintf
+var _ = json.NewDecoder
+var _ = io.Copy
+var _ = url.Parse
+var _ = gensupport.MarshalJSON
+var _ = googleapi.Version
+var _ = errors.New
+var _ = strings.Replace
+var _ = context.Canceled
+var _ = internaloption.WithDefaultEndpoint
+
+const apiId = "oauth2:v2"
+const apiName = "oauth2"
+const apiVersion = "v2"
+const basePath = "https://www.googleapis.com/"
+
+// OAuth2 scopes used by this API.
+const (
+	// View your email address
+	UserinfoEmailScope = "https://www.googleapis.com/auth/userinfo.email"
+
+	// See your personal info, including any personal info you've made
+	// publicly available
+	UserinfoProfileScope = "https://www.googleapis.com/auth/userinfo.profile"
+
+	// Associate you with your personal info on Google
+	OpenIDScope = "openid"
+)
+
+// NewService creates a new Service.
+func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, error) {
+	scopesOption := option.WithScopes(
+		"https://www.googleapis.com/auth/userinfo.email",
+		"https://www.googleapis.com/auth/userinfo.profile",
+		"openid",
+	)
+	// NOTE: prepend, so we don't override user-specified scopes.
+	opts = append([]option.ClientOption{scopesOption}, opts...)
+	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
+	client, endpoint, err := htransport.NewClient(ctx, opts...)
+	if err != nil {
+		return nil, err
+	}
+	s, err := New(client)
+	if err != nil {
+		return nil, err
+	}
+	if endpoint != "" {
+		s.BasePath = endpoint
+	}
+	return s, nil
+}
+
+// New creates a new Service. It uses the provided http.Client for requests.
+//
+// Deprecated: please use NewService instead.
+// To provide a custom HTTP client, use option.WithHTTPClient.
+// If you are using google.golang.org/api/googleapis/transport.APIKey, use option.WithAPIKey with NewService instead.
+func New(client *http.Client) (*Service, error) {
+	if client == nil {
+		return nil, errors.New("client is nil")
+	}
+	s := &Service{client: client, BasePath: basePath}
+	s.Userinfo = NewUserinfoService(s)
+	return s, nil
+}
+
+type Service struct {
+	client    *http.Client
+	BasePath  string // API endpoint base URL
+	UserAgent string // optional additional User-Agent fragment
+
+	Userinfo *UserinfoService
+}
+
+func (s *Service) userAgent() string {
+	if s.UserAgent == "" {
+		return googleapi.UserAgent
+	}
+	return googleapi.UserAgent + " " + s.UserAgent
+}
+
+func NewUserinfoService(s *Service) *UserinfoService {
+	rs := &UserinfoService{s: s}
+	rs.V2 = NewUserinfoV2Service(s)
+	return rs
+}
+
+type UserinfoService struct {
+	s *Service
+
+	V2 *UserinfoV2Service
+}
+
+func NewUserinfoV2Service(s *Service) *UserinfoV2Service {
+	rs := &UserinfoV2Service{s: s}
+	rs.Me = NewUserinfoV2MeService(s)
+	return rs
+}
+
+type UserinfoV2Service struct {
+	s *Service
+
+	Me *UserinfoV2MeService
+}
+
+func NewUserinfoV2MeService(s *Service) *UserinfoV2MeService {
+	rs := &UserinfoV2MeService{s: s}
+	return rs
+}
+
+type UserinfoV2MeService struct {
+	s *Service
+}
+
+type Tokeninfo struct {
+	// Audience: Who is the intended audience for this token. In general the
+	// same as issued_to.
+	Audience string `json:"audience,omitempty"`
+
+	// Email: The email address of the user. Present only if the email scope
+	// is present in the request.
+	Email string `json:"email,omitempty"`
+
+	// ExpiresIn: The expiry time of the token, as number of seconds left
+	// until expiry.
+	ExpiresIn int64 `json:"expires_in,omitempty"`
+
+	// IssuedTo: To whom was the token issued to. In general the same as
+	// audience.
+	IssuedTo string `json:"issued_to,omitempty"`
+
+	// Scope: The space separated list of scopes granted to this token.
+	Scope string `json:"scope,omitempty"`
+
+	// UserId: The obfuscated user id.
+	UserId string `json:"user_id,omitempty"`
+
+	// VerifiedEmail: Boolean flag which is true if the email address is
+	// verified. Present only if the email scope is present in the request.
+	VerifiedEmail bool `json:"verified_email,omitempty"`
+
+	// ServerResponse contains the HTTP response code and headers from the
+	// server.
+	googleapi.ServerResponse `json:"-"`
+
+	// ForceSendFields is a list of field names (e.g. "Audience") to
+	// unconditionally include in API requests. By default, fields with
+	// empty or default values are omitted from API requests. However, any
+	// non-pointer, non-interface field appearing in ForceSendFields will be
+	// sent to the server regardless of whether the field is empty or not.
+	// This may be used to include empty fields in Patch requests.
+	ForceSendFields []string `json:"-"`
+
+	// NullFields is a list of field names (e.g. "Audience") to include in
+	// API requests with the JSON null value. By default, fields with empty
+	// values are omitted from API requests. However, any field with an
+	// empty value appearing in NullFields will be sent to the server as
+	// null. It is an error if a field in this list has a non-empty value.
+	// This may be used to include null fields in Patch requests.
+	NullFields []string `json:"-"`
+}
+
+func (s *Tokeninfo) MarshalJSON() ([]byte, error) {
+	type NoMethod Tokeninfo
+	raw := NoMethod(*s)
+	return gensupport.MarshalJSON(raw, s.ForceSendFields, s.NullFields)
+}
+
+type Userinfo struct {
+	// Email: The user's email address.
+	Email string `json:"email,omitempty"`
+
+	// FamilyName: The user's last name.
+	FamilyName string `json:"family_name,omitempty"`
+
+	// Gender: The user's gender.
+	Gender string `json:"gender,omitempty"`
+
+	// GivenName: The user's first name.
+	GivenName string `json:"given_name,omitempty"`
+
+	// Hd: The hosted domain e.g. example.com if the user is Google apps
+	// user.
+	Hd string `json:"hd,omitempty"`
+
+	// Id: The obfuscated ID of the user.
+	Id string `json:"id,omitempty"`
+
+	// Link: URL of the profile page.
+	Link string `json:"link,omitempty"`
+
+	// Locale: The user's preferred locale.
+	Locale string `json:"locale,omitempty"`
+
+	// Name: The user's full name.
+	Name string `json:"name,omitempty"`
+
+	// Picture: URL of the user's picture image.
+	Picture string `json:"picture,omitempty"`
+
+	// VerifiedEmail: Boolean flag which is true if the email address is
+	// verified. Always verified because we only return the user's primary
+	// email address.
+	//
+	// Default: true
+	VerifiedEmail *bool `json:"verified_email,omitempty"`
+
+	// ServerResponse contains the HTTP response code and headers from the
+	// server.
+	googleapi.ServerResponse `json:"-"`
+
+	// ForceSendFields is a list of field names (e.g. "Email") to
+	// unconditionally include in API requests. By default, fields with
+	// empty or default values are omitted from API requests. However, any
+	// non-pointer, non-interface field appearing in ForceSendFields will be
+	// sent to the server regardless of whether the field is empty or not.
+	// This may be used to include empty fields in Patch requests.
+	ForceSendFields []string `json:"-"`
+
+	// NullFields is a list of field names (e.g. "Email") to include in API
+	// requests with the JSON null value. By default, fields with empty
+	// values are omitted from API requests. However, any field with an
+	// empty value appearing in NullFields will be sent to the server as
+	// null. It is an error if a field in this list has a non-empty value.
+	// This may be used to include null fields in Patch requests.
+	NullFields []string `json:"-"`
+}
+
+func (s *Userinfo) MarshalJSON() ([]byte, error) {
+	type NoMethod Userinfo
+	raw := NoMethod(*s)
+	return gensupport.MarshalJSON(raw, s.ForceSendFields, s.NullFields)
+}
+
+// method id "oauth2.tokeninfo":
+
+type TokeninfoCall struct {
+	s          *Service
+	urlParams_ gensupport.URLParams
+	ctx_       context.Context
+	header_    http.Header
+}
+
+// Tokeninfo:
+func (s *Service) Tokeninfo() *TokeninfoCall {
+	c := &TokeninfoCall{s: s, urlParams_: make(gensupport.URLParams)}
+	return c
+}
+
+// AccessToken sets the optional parameter "access_token":
+func (c *TokeninfoCall) AccessToken(accessToken string) *TokeninfoCall {
+	c.urlParams_.Set("access_token", accessToken)
+	return c
+}
+
+// IdToken sets the optional parameter "id_token":
+func (c *TokeninfoCall) IdToken(idToken string) *TokeninfoCall {
+	c.urlParams_.Set("id_token", idToken)
+	return c
+}
+
+// Fields allows partial responses to be retrieved. See
+// https://developers.google.com/gdata/docs/2.0/basics#PartialResponse
+// for more information.
+func (c *TokeninfoCall) Fields(s ...googleapi.Field) *TokeninfoCall {
+	c.urlParams_.Set("fields", googleapi.CombineFields(s))
+	return c
+}
+
+// Context sets the context to be used in this call's Do method. Any
+// pending HTTP request will be aborted if the provided context is
+// canceled.
+func (c *TokeninfoCall) Context(ctx context.Context) *TokeninfoCall {
+	c.ctx_ = ctx
+	return c
+}
+
+// Header returns an http.Header that can be modified by the caller to
+// add HTTP headers to the request.
+func (c *TokeninfoCall) Header() http.Header {
+	if c.header_ == nil {
+		c.header_ = make(http.Header)
+	}
+	return c.header_
+}
+
+func (c *TokeninfoCall) doRequest(alt string) (*http.Response, error) {
+	reqHeaders := make(http.Header)
+	reqHeaders.Set("x-goog-api-client", "gl-go/"+gensupport.GoVersion()+" gdcl/20210930")
+	for k, v := range c.header_ {
+		reqHeaders[k] = v
+	}
+	reqHeaders.Set("User-Agent", c.s.userAgent())
+	var body io.Reader = nil
+	c.urlParams_.Set("alt", alt)
+	c.urlParams_.Set("prettyPrint", "false")
+	urls := googleapi.ResolveRelative(c.s.BasePath, "oauth2/v2/tokeninfo")
+	urls += "?" + c.urlParams_.Encode()
+	req, err := http.NewRequest("POST", urls, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header = reqHeaders
+	return gensupport.SendRequest(c.ctx_, c.s.client, req)
+}
+
+// Do executes the "oauth2.tokeninfo" call.
+// Exactly one of *Tokeninfo or error will be non-nil. Any non-2xx
+// status code is an error. Response headers are in either
+// *Tokeninfo.ServerResponse.Header or (if a response was returned at
+// all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified
+// to check whether the returned error was because
+// http.StatusNotModified was returned.
+func (c *TokeninfoCall) Do(opts ...googleapi.CallOption) (*Tokeninfo, error) {
+	gensupport.SetOptions(c.urlParams_, opts...)
+	res, err := c.doRequest("json")
+	if res != nil && res.StatusCode == http.StatusNotModified {
+		if res.Body != nil {
+			res.Body.Close()
+		}
+		return nil, &googleapi.Error{
+			Code:   res.StatusCode,
+			Header: res.Header,
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer googleapi.CloseBody(res)
+	if err := googleapi.CheckResponse(res); err != nil {
+		return nil, err
+	}
+	ret := &Tokeninfo{
+		ServerResponse: googleapi.ServerResponse{
+			Header:         res.Header,
+			HTTPStatusCode: res.StatusCode,
+		},
+	}
+	target := &ret
+	if err := gensupport.DecodeResponse(target, res); err != nil {
+		return nil, err
+	}
+	return ret, nil
+	// {
+	//   "httpMethod": "POST",
+	//   "id": "oauth2.tokeninfo",
+	//   "parameters": {
+	//     "access_token": {
+	//       "location": "query",
+	//       "type": "string"
+	//     },
+	//     "id_token": {
+	//       "location": "query",
+	//       "type": "string"
+	//     }
+	//   },
+	//   "path": "oauth2/v2/tokeninfo",
+	//   "response": {
+	//     "$ref": "Tokeninfo"
+	//   }
+	// }
+
+}
+
+// method id "oauth2.userinfo.get":
+
+type UserinfoGetCall struct {
+	s            *Service
+	urlParams_   gensupport.URLParams
+	ifNoneMatch_ string
+	ctx_         context.Context
+	header_      http.Header
+}
+
+// Get:
+func (r *UserinfoService) Get() *UserinfoGetCall {
+	c := &UserinfoGetCall{s: r.s, urlParams_: make(gensupport.URLParams)}
+	return c
+}
+
+// Fields allows partial responses to be retrieved. See
+// https://developers.google.com/gdata/docs/2.0/basics#PartialResponse
+// for more information.
+func (c *UserinfoGetCall) Fields(s ...googleapi.Field) *UserinfoGetCall {
+	c.urlParams_.Set("fields", googleapi.CombineFields(s))
+	return c
+}
+
+// IfNoneMatch sets the optional parameter which makes the operation
+// fail if the object's ETag matches the given value. This is useful for
+// getting updates only after the object has changed since the last
+// request. Use googleapi.IsNotModified to check whether the response
+// error from Do is the result of In-None-Match.
+func (c *UserinfoGetCall) IfNoneMatch(entityTag string) *UserinfoGetCall {
+	c.ifNoneMatch_ = entityTag
+	return c
+}
+
+// Context sets the context to be used in this call's Do method. Any
+// pending HTTP request will be aborted if the provided context is
+// canceled.
+func (c *UserinfoGetCall) Context(ctx context.Context) *UserinfoGetCall {
+	c.ctx_ = ctx
+	return c
+}
+
+// Header returns an http.Header that can be modified by the caller to
+// add HTTP headers to the request.
+func (c *UserinfoGetCall) Header() http.Header {
+	if c.header_ == nil {
+		c.header_ = make(http.Header)
+	}
+	return c.header_
+}
+
+func (c *UserinfoGetCall) doRequest(alt string) (*http.Response, error) {
+	reqHeaders := make(http.Header)
+	reqHeaders.Set("x-goog-api-client", "gl-go/"+gensupport.GoVersion()+" gdcl/20210930")
+	for k, v := range c.header_ {
+		reqHeaders[k] = v
+	}
+	reqHeaders.Set("User-Agent", c.s.userAgent())
+	if c.ifNoneMatch_ != "" {
+		reqHeaders.Set("If-None-Match", c.ifNoneMatch_)
+	}
+	var body io.Reader = nil
+	c.urlParams_.Set("alt", alt)
+	c.urlParams_.Set("prettyPrint", "false")
+	urls := googleapi.ResolveRelative(c.s.BasePath, "oauth2/v2/userinfo")
+	urls += "?" + c.urlParams_.Encode()
+	req, err := http.NewRequest("GET", urls, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header = reqHeaders
+	return gensupport.SendRequest(c.ctx_, c.s.client, req)
+}
+
+// Do executes the "oauth2.userinfo.get" call.
+// Exactly one of *Userinfo or error will be non-nil. Any non-2xx status
+// code is an error. Response headers are in either
+// *Userinfo.ServerResponse.Header or (if a response was returned at
+// all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified
+// to check whether the returned error was because
+// http.StatusNotModified was returned.
+func (c *UserinfoGetCall) Do(opts ...googleapi.CallOption) (*Userinfo, error) {
+	gensupport.SetOptions(c.urlParams_, opts...)
+	res, err := c.doRequest("json")
+	if res != nil && res.StatusCode == http.StatusNotModified {
+		if res.Body != nil {
+			res.Body.Close()
+		}
+		return nil, &googleapi.Error{
+			Code:   res.StatusCode,
+			Header: res.Header,
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer googleapi.CloseBody(res)
+	if err := googleapi.CheckResponse(res); err != nil {
+		return nil, err
+	}
+	ret := &Userinfo{
+		ServerResponse: googleapi.ServerResponse{
+			Header:         res.Header,
+			HTTPStatusCode: res.StatusCode,
+		},
+	}
+	target := &ret
+	if err := gensupport.DecodeResponse(target, res); err != nil {
+		return nil, err
+	}
+	return ret, nil
+	// {
+	//   "httpMethod": "GET",
+	//   "id": "oauth2.userinfo.get",
+	//   "path": "oauth2/v2/userinfo",
+	//   "response": {
+	//     "$ref": "Userinfo"
+	//   },
+	//   "scopes": [
+	//     "openid",
+	//     "https://www.googleapis.com/auth/userinfo.email",
+	//     "https://www.googleapis.com/auth/userinfo.profile"
+	//   ]
+	// }
+
+}
+
+// method id "oauth2.userinfo.v2.me.get":
+
+type UserinfoV2MeGetCall struct {
+	s            *Service
+	urlParams_   gensupport.URLParams
+	ifNoneMatch_ string
+	ctx_         context.Context
+	header_      http.Header
+}
+
+// Get:
+func (r *UserinfoV2MeService) Get() *UserinfoV2MeGetCall {
+	c := &UserinfoV2MeGetCall{s: r.s, urlParams_: make(gensupport.URLParams)}
+	return c
+}
+
+// Fields allows partial responses to be retrieved. See
+// https://developers.google.com/gdata/docs/2.0/basics#PartialResponse
+// for more information.
+func (c *UserinfoV2MeGetCall) Fields(s ...googleapi.Field) *UserinfoV2MeGetCall {
+	c.urlParams_.Set("fields", googleapi.CombineFields(s))
+	return c
+}
+
+// IfNoneMatch sets the optional parameter which makes the operation
+// fail if the object's ETag matches the given value. This is useful for
+// getting updates only after the object has changed since the last
+// request. Use googleapi.IsNotModified to check whether the response
+// error from Do is the result of In-None-Match.
+func (c *UserinfoV2MeGetCall) IfNoneMatch(entityTag string) *UserinfoV2MeGetCall {
+	c.ifNoneMatch_ = entityTag
+	return c
+}
+
+// Context sets the context to be used in this call's Do method. Any
+// pending HTTP request will be aborted if the provided context is
+// canceled.
+func (c *UserinfoV2MeGetCall) Context(ctx context.Context) *UserinfoV2MeGetCall {
+	c.ctx_ = ctx
+	return c
+}
+
+// Header returns an http.Header that can be modified by the caller to
+// add HTTP headers to the request.
+func (c *UserinfoV2MeGetCall) Header() http.Header {
+	if c.header_ == nil {
+		c.header_ = make(http.Header)
+	}
+	return c.header_
+}
+
+func (c *UserinfoV2MeGetCall) doRequest(alt string) (*http.Response, error) {
+	reqHeaders := make(http.Header)
+	reqHeaders.Set("x-goog-api-client", "gl-go/"+gensupport.GoVersion()+" gdcl/20210930")
+	for k, v := range c.header_ {
+		reqHeaders[k] = v
+	}
+	reqHeaders.Set("User-Agent", c.s.userAgent())
+	if c.ifNoneMatch_ != "" {
+		reqHeaders.Set("If-None-Match", c.ifNoneMatch_)
+	}
+	var body io.Reader = nil
+	c.urlParams_.Set("alt", alt)
+	c.urlParams_.Set("prettyPrint", "false")
+	urls := googleapi.ResolveRelative(c.s.BasePath, "userinfo/v2/me")
+	urls += "?" + c.urlParams_.Encode()
+	req, err := http.NewRequest("GET", urls, body)
+	if err != nil {
+		return nil, err
+	}
+	req.Header = reqHeaders
+	return gensupport.SendRequest(c.ctx_, c.s.client, req)
+}
+
+// Do executes the "oauth2.userinfo.v2.me.get" call.
+// Exactly one of *Userinfo or error will be non-nil. Any non-2xx status
+// code is an error. Response headers are in either
+// *Userinfo.ServerResponse.Header or (if a response was returned at
+// all) in error.(*googleapi.Error).Header. Use googleapi.IsNotModified
+// to check whether the returned error was because
+// http.StatusNotModified was returned.
+func (c *UserinfoV2MeGetCall) Do(opts ...googleapi.CallOption) (*Userinfo, error) {
+	gensupport.SetOptions(c.urlParams_, opts...)
+	res, err := c.doRequest("json")
+	if res != nil && res.StatusCode == http.StatusNotModified {
+		if res.Body != nil {
+			res.Body.Close()
+		}
+		return nil, &googleapi.Error{
+			Code:   res.StatusCode,
+			Header: res.Header,
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer googleapi.CloseBody(res)
+	if err := googleapi.CheckResponse(res); err != nil {
+		return nil, err
+	}
+	ret := &Userinfo{
+		ServerResponse: googleapi.ServerResponse{
+			Header:         res.Header,
+			HTTPStatusCode: res.StatusCode,
+		},
+	}
+	target := &ret
+	if err := gensupport.DecodeResponse(target, res); err != nil {
+		return nil, err
+	}
+	return ret, nil
+	// {
+	//   "httpMethod": "GET",
+	//   "id": "oauth2.userinfo.v2.me.get",
+	//   "path": "userinfo/v2/me",
+	//   "response": {
+	//     "$ref": "Userinfo"
+	//   },
+	//   "scopes": [
+	//     "openid",
+	//     "https://www.googleapis.com/auth/userinfo.email",
+	//     "https://www.googleapis.com/auth/userinfo.profile"
+	//   ]
+	// }
+
+}

vendor/google.golang.org/api/option/credentials_go19.go

@@ -0,0 +1,24 @@
+// Copyright 2018 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.9
+// +build go1.9
+
+package option
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+)
+
+type withCreds google.Credentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.Credentials = (*google.Credentials)(w)
+}
+
+// WithCredentials returns a ClientOption that authenticates API calls.
+func WithCredentials(creds *google.Credentials) ClientOption {
+	return (*withCreds)(creds)
+}

vendor/google.golang.org/api/option/credentials_notgo19.go

@@ -0,0 +1,23 @@
+// Copyright 2018 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.9
+// +build !go1.9
+
+package option
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+)
+
+type withCreds google.DefaultCredentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.Credentials = (*google.DefaultCredentials)(w)
+}
+
+func WithCredentials(creds *google.DefaultCredentials) ClientOption {
+	return (*withCreds)(creds)
+}

vendor/google.golang.org/api/option/internaloption/internaloption.go

@@ -0,0 +1,136 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package internaloption contains options used internally by Google client code.
+package internaloption
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+	"google.golang.org/api/option"
+)
+
+type defaultEndpointOption string
+
+func (o defaultEndpointOption) Apply(settings *internal.DialSettings) {
+	settings.DefaultEndpoint = string(o)
+}
+
+// WithDefaultEndpoint is an option that indicates the default endpoint.
+//
+// It should only be used internally by generated clients.
+//
+// This is similar to WithEndpoint, but allows us to determine whether the user has overridden the default endpoint.
+func WithDefaultEndpoint(url string) option.ClientOption {
+	return defaultEndpointOption(url)
+}
+
+type defaultMTLSEndpointOption string
+
+func (o defaultMTLSEndpointOption) Apply(settings *internal.DialSettings) {
+	settings.DefaultMTLSEndpoint = string(o)
+}
+
+// WithDefaultMTLSEndpoint is an option that indicates the default mTLS endpoint.
+//
+// It should only be used internally by generated clients.
+func WithDefaultMTLSEndpoint(url string) option.ClientOption {
+	return defaultMTLSEndpointOption(url)
+}
+
+// SkipDialSettingsValidation bypasses validation on ClientOptions.
+//
+// It should only be used internally.
+func SkipDialSettingsValidation() option.ClientOption {
+	return skipDialSettingsValidation{}
+}
+
+type skipDialSettingsValidation struct{}
+
+func (s skipDialSettingsValidation) Apply(settings *internal.DialSettings) {
+	settings.SkipValidation = true
+}
+
+// EnableDirectPath returns a ClientOption that overrides the default
+// attempt to use DirectPath.
+//
+// It should only be used internally by generated clients.
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func EnableDirectPath(dp bool) option.ClientOption {
+	return enableDirectPath(dp)
+}
+
+type enableDirectPath bool
+
+func (e enableDirectPath) Apply(o *internal.DialSettings) {
+	o.EnableDirectPath = bool(e)
+}
+
+// AllowNonDefaultServiceAccount returns a ClientOption that overrides the default
+// requirement for using the default service account for DirectPath.
+//
+// It should only be used internally by generated clients.
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func AllowNonDefaultServiceAccount(nd bool) option.ClientOption {
+	return allowNonDefaultServiceAccount(nd)
+}
+
+type allowNonDefaultServiceAccount bool
+
+func (a allowNonDefaultServiceAccount) Apply(o *internal.DialSettings) {
+	o.AllowNonDefaultServiceAccount = bool(a)
+}
+
+// WithDefaultAudience returns a ClientOption that specifies a default audience
+// to be used as the audience field ("aud") for the JWT token authentication.
+//
+// It should only be used internally by generated clients.
+func WithDefaultAudience(audience string) option.ClientOption {
+	return withDefaultAudience(audience)
+}
+
+type withDefaultAudience string
+
+func (w withDefaultAudience) Apply(o *internal.DialSettings) {
+	o.DefaultAudience = string(w)
+}
+
+// WithDefaultScopes returns a ClientOption that overrides the default OAuth2
+// scopes to be used for a service.
+//
+// It should only be used internally by generated clients.
+func WithDefaultScopes(scope ...string) option.ClientOption {
+	return withDefaultScopes(scope)
+}
+
+type withDefaultScopes []string
+
+func (w withDefaultScopes) Apply(o *internal.DialSettings) {
+	o.DefaultScopes = make([]string, len(w))
+	copy(o.DefaultScopes, w)
+}
+
+// EnableJwtWithScope returns a ClientOption that specifies if scope can be used
+// with self-signed JWT.
+func EnableJwtWithScope() option.ClientOption {
+	return enableJwtWithScope(true)
+}
+
+type enableJwtWithScope bool
+
+func (w enableJwtWithScope) Apply(o *internal.DialSettings) {
+	o.EnableJwtWithScope = bool(w)
+}
+
+// WithCredentials returns a client option to specify credentials which will be used to authenticate API calls.
+// This credential takes precedence over all other credential options.
+func WithCredentials(creds *google.Credentials) option.ClientOption {
+	return (*withCreds)(creds)
+}
+
+type withCreds google.Credentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.InternalCredentials = (*google.Credentials)(w)
+}

vendor/google.golang.org/api/option/option.go

@@ -0,0 +1,330 @@
+// Copyright 2017 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package option contains options for Google API clients.
+package option
+
+import (
+	"crypto/tls"
+	"net/http"
+
+	"golang.org/x/oauth2"
+	"google.golang.org/api/internal"
+	"google.golang.org/api/internal/impersonate"
+	"google.golang.org/grpc"
+)
+
+// A ClientOption is an option for a Google API client.
+type ClientOption interface {
+	Apply(*internal.DialSettings)
+}
+
+// WithTokenSource returns a ClientOption that specifies an OAuth2 token
+// source to be used as the basis for authentication.
+func WithTokenSource(s oauth2.TokenSource) ClientOption {
+	return withTokenSource{s}
+}
+
+type withTokenSource struct{ ts oauth2.TokenSource }
+
+func (w withTokenSource) Apply(o *internal.DialSettings) {
+	o.TokenSource = w.ts
+}
+
+type withCredFile string
+
+func (w withCredFile) Apply(o *internal.DialSettings) {
+	o.CredentialsFile = string(w)
+}
+
+// WithCredentialsFile returns a ClientOption that authenticates
+// API calls with the given service account or refresh token JSON
+// credentials file.
+func WithCredentialsFile(filename string) ClientOption {
+	return withCredFile(filename)
+}
+
+// WithServiceAccountFile returns a ClientOption that uses a Google service
+// account credentials file to authenticate.
+//
+// Deprecated: Use WithCredentialsFile instead.
+func WithServiceAccountFile(filename string) ClientOption {
+	return WithCredentialsFile(filename)
+}
+
+// WithCredentialsJSON returns a ClientOption that authenticates
+// API calls with the given service account or refresh token JSON
+// credentials.
+func WithCredentialsJSON(p []byte) ClientOption {
+	return withCredentialsJSON(p)
+}
+
+type withCredentialsJSON []byte
+
+func (w withCredentialsJSON) Apply(o *internal.DialSettings) {
+	o.CredentialsJSON = make([]byte, len(w))
+	copy(o.CredentialsJSON, w)
+}
+
+// WithEndpoint returns a ClientOption that overrides the default endpoint
+// to be used for a service.
+func WithEndpoint(url string) ClientOption {
+	return withEndpoint(url)
+}
+
+type withEndpoint string
+
+func (w withEndpoint) Apply(o *internal.DialSettings) {
+	o.Endpoint = string(w)
+}
+
+// WithScopes returns a ClientOption that overrides the default OAuth2 scopes
+// to be used for a service.
+func WithScopes(scope ...string) ClientOption {
+	return withScopes(scope)
+}
+
+type withScopes []string
+
+func (w withScopes) Apply(o *internal.DialSettings) {
+	o.Scopes = make([]string, len(w))
+	copy(o.Scopes, w)
+}
+
+// WithUserAgent returns a ClientOption that sets the User-Agent.
+func WithUserAgent(ua string) ClientOption {
+	return withUA(ua)
+}
+
+type withUA string
+
+func (w withUA) Apply(o *internal.DialSettings) { o.UserAgent = string(w) }
+
+// WithHTTPClient returns a ClientOption that specifies the HTTP client to use
+// as the basis of communications. This option may only be used with services
+// that support HTTP as their communication transport. When used, the
+// WithHTTPClient option takes precedent over all other supplied options.
+func WithHTTPClient(client *http.Client) ClientOption {
+	return withHTTPClient{client}
+}
+
+type withHTTPClient struct{ client *http.Client }
+
+func (w withHTTPClient) Apply(o *internal.DialSettings) {
+	o.HTTPClient = w.client
+}
+
+// WithGRPCConn returns a ClientOption that specifies the gRPC client
+// connection to use as the basis of communications. This option may only be
+// used with services that support gRPC as their communication transport. When
+// used, the WithGRPCConn option takes precedent over all other supplied
+// options.
+func WithGRPCConn(conn *grpc.ClientConn) ClientOption {
+	return withGRPCConn{conn}
+}
+
+type withGRPCConn struct{ conn *grpc.ClientConn }
+
+func (w withGRPCConn) Apply(o *internal.DialSettings) {
+	o.GRPCConn = w.conn
+}
+
+// WithGRPCDialOption returns a ClientOption that appends a new grpc.DialOption
+// to an underlying gRPC dial. It does not work with WithGRPCConn.
+func WithGRPCDialOption(opt grpc.DialOption) ClientOption {
+	return withGRPCDialOption{opt}
+}
+
+type withGRPCDialOption struct{ opt grpc.DialOption }
+
+func (w withGRPCDialOption) Apply(o *internal.DialSettings) {
+	o.GRPCDialOpts = append(o.GRPCDialOpts, w.opt)
+}
+
+// WithGRPCConnectionPool returns a ClientOption that creates a pool of gRPC
+// connections that requests will be balanced between.
+//
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func WithGRPCConnectionPool(size int) ClientOption {
+	return withGRPCConnectionPool(size)
+}
+
+type withGRPCConnectionPool int
+
+func (w withGRPCConnectionPool) Apply(o *internal.DialSettings) {
+	o.GRPCConnPoolSize = int(w)
+}
+
+// WithAPIKey returns a ClientOption that specifies an API key to be used
+// as the basis for authentication.
+//
+// API Keys can only be used for JSON-over-HTTP APIs, including those under
+// the import path google.golang.org/api/....
+func WithAPIKey(apiKey string) ClientOption {
+	return withAPIKey(apiKey)
+}
+
+type withAPIKey string
+
+func (w withAPIKey) Apply(o *internal.DialSettings) { o.APIKey = string(w) }
+
+// WithAudiences returns a ClientOption that specifies an audience to be used
+// as the audience field ("aud") for the JWT token authentication.
+func WithAudiences(audience ...string) ClientOption {
+	return withAudiences(audience)
+}
+
+type withAudiences []string
+
+func (w withAudiences) Apply(o *internal.DialSettings) {
+	o.Audiences = make([]string, len(w))
+	copy(o.Audiences, w)
+}
+
+// WithoutAuthentication returns a ClientOption that specifies that no
+// authentication should be used. It is suitable only for testing and for
+// accessing public resources, like public Google Cloud Storage buckets.
+// It is an error to provide both WithoutAuthentication and any of WithAPIKey,
+// WithTokenSource, WithCredentialsFile or WithServiceAccountFile.
+func WithoutAuthentication() ClientOption {
+	return withoutAuthentication{}
+}
+
+type withoutAuthentication struct{}
+
+func (w withoutAuthentication) Apply(o *internal.DialSettings) { o.NoAuth = true }
+
+// WithQuotaProject returns a ClientOption that specifies the project used
+// for quota and billing purposes.
+//
+// For more information please read:
+// https://cloud.google.com/apis/docs/system-parameters
+func WithQuotaProject(quotaProject string) ClientOption {
+	return withQuotaProject(quotaProject)
+}
+
+type withQuotaProject string
+
+func (w withQuotaProject) Apply(o *internal.DialSettings) {
+	o.QuotaProject = string(w)
+}
+
+// WithRequestReason returns a ClientOption that specifies a reason for
+// making the request, which is intended to be recorded in audit logging.
+// An example reason would be a support-case ticket number.
+//
+// For more information please read:
+// https://cloud.google.com/apis/docs/system-parameters
+func WithRequestReason(requestReason string) ClientOption {
+	return withRequestReason(requestReason)
+}
+
+type withRequestReason string
+
+func (w withRequestReason) Apply(o *internal.DialSettings) {
+	o.RequestReason = string(w)
+}
+
+// WithTelemetryDisabled returns a ClientOption that disables default telemetry (OpenCensus)
+// settings on gRPC and HTTP clients.
+// An example reason would be to bind custom telemetry that overrides the defaults.
+func WithTelemetryDisabled() ClientOption {
+	return withTelemetryDisabled{}
+}
+
+type withTelemetryDisabled struct{}
+
+func (w withTelemetryDisabled) Apply(o *internal.DialSettings) {
+	o.TelemetryDisabled = true
+}
+
+// ClientCertSource is a function that returns a TLS client certificate to be used
+// when opening TLS connections.
+//
+// It follows the same semantics as crypto/tls.Config.GetClientCertificate.
+//
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+type ClientCertSource = func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+
+// WithClientCertSource returns a ClientOption that specifies a
+// callback function for obtaining a TLS client certificate.
+//
+// This option is used for supporting mTLS authentication, where the
+// server validates the client certifcate when establishing a connection.
+//
+// The callback function will be invoked whenever the server requests a
+// certificate from the client. Implementations of the callback function
+// should try to ensure that a valid certificate can be repeatedly returned
+// on demand for the entire life cycle of the transport client. If a nil
+// Certificate is returned (i.e. no Certificate can be obtained), an error
+// should be returned.
+//
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+func WithClientCertSource(s ClientCertSource) ClientOption {
+	return withClientCertSource{s}
+}
+
+type withClientCertSource struct{ s ClientCertSource }
+
+func (w withClientCertSource) Apply(o *internal.DialSettings) {
+	o.ClientCertSource = w.s
+}
+
+// ImpersonateCredentials returns a ClientOption that will impersonate the
+// target service account.
+//
+// In order to impersonate the target service account
+// the base service account must have the Service Account Token Creator role,
+// roles/iam.serviceAccountTokenCreator, on the target service account.
+// See https://cloud.google.com/iam/docs/understanding-service-accounts.
+//
+// Optionally, delegates can be used during impersonation if the base service
+// account lacks the token creator role on the target. When using delegates,
+// each service account must be granted roles/iam.serviceAccountTokenCreator
+// on the next service account in the chain.
+//
+// For example, if a base service account of SA1 is trying to impersonate target
+// service account SA2 while using delegate service accounts DSA1 and DSA2,
+// the following must be true:
+//
+//   1. Base service account SA1 has roles/iam.serviceAccountTokenCreator on
+//      DSA1.
+//   2. DSA1 has roles/iam.serviceAccountTokenCreator on DSA2.
+//   3. DSA2 has roles/iam.serviceAccountTokenCreator on target SA2.
+//
+// The resulting impersonated credential will either have the default scopes of
+// the client being instantiating or the scopes from WithScopes if provided.
+// Scopes are required for creating impersonated credentials, so if this option
+// is used while not using a NewClient/NewService function, WithScopes must also
+// be explicitly passed in as well.
+//
+// If the base credential is an authorized user and not a service account, or if
+// the option WithQuotaProject is set, the target service account must have a
+// role that grants the serviceusage.services.use permission such as
+// roles/serviceusage.serviceUsageConsumer.
+//
+// This is an EXPERIMENTAL API and may be changed or removed in the future.
+//
+// This option has been replaced by `impersonate` package:
+// `google.golang.org/api/impersonate`. Please use the `impersonate` package
+// instead.
+func ImpersonateCredentials(target string, delegates ...string) ClientOption {
+	return impersonateServiceAccount{
+		target:    target,
+		delegates: delegates,
+	}
+}
+
+type impersonateServiceAccount struct {
+	target    string
+	delegates []string
+}
+
+func (i impersonateServiceAccount) Apply(o *internal.DialSettings) {
+	o.ImpersonationConfig = &impersonate.Config{
+		Target: i.target,
+	}
+	o.ImpersonationConfig.Delegates = make([]string, len(i.delegates))
+	copy(o.ImpersonationConfig.Delegates, i.delegates)
+}

vendor/google.golang.org/api/transport/cert/default_cert.go

@@ -0,0 +1,141 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package cert contains certificate tools for Google API clients.
+// This package is intended to be used with crypto/tls.Config.GetClientCertificate.
+//
+// The certificates can be used to satisfy Google's Endpoint Validation.
+// See https://cloud.google.com/endpoint-verification/docs/overview
+//
+// This package is not intended for use by end developers. Use the
+// google.golang.org/api/option package to configure API clients.
+package cert
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"os/user"
+	"path/filepath"
+	"sync"
+	"time"
+)
+
+const (
+	metadataPath = ".secureConnect"
+	metadataFile = "context_aware_metadata.json"
+)
+
+// defaultCertData holds all the variables pertaining to
+// the default certficate source created by DefaultSource.
+type defaultCertData struct {
+	once            sync.Once
+	source          Source
+	err             error
+	cachedCertMutex sync.Mutex
+	cachedCert      *tls.Certificate
+}
+
+var (
+	defaultCert defaultCertData
+)
+
+// Source is a function that can be passed into crypto/tls.Config.GetClientCertificate.
+type Source func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+
+// DefaultSource returns a certificate source that execs the command specified
+// in the file at ~/.secureConnect/context_aware_metadata.json
+//
+// If that file does not exist, a nil source is returned.
+func DefaultSource() (Source, error) {
+	defaultCert.once.Do(func() {
+		defaultCert.source, defaultCert.err = newSecureConnectSource()
+	})
+	return defaultCert.source, defaultCert.err
+}
+
+type secureConnectSource struct {
+	metadata secureConnectMetadata
+}
+
+type secureConnectMetadata struct {
+	Cmd []string `json:"cert_provider_command"`
+}
+
+// newSecureConnectSource creates a secureConnectSource by reading the well-known file.
+func newSecureConnectSource() (Source, error) {
+	user, err := user.Current()
+	if err != nil {
+		// Ignore.
+		return nil, nil
+	}
+	filename := filepath.Join(user.HomeDir, metadataPath, metadataFile)
+	file, err := ioutil.ReadFile(filename)
+	if os.IsNotExist(err) {
+		// Ignore.
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	var metadata secureConnectMetadata
+	if err := json.Unmarshal(file, &metadata); err != nil {
+		return nil, fmt.Errorf("cert: could not parse JSON in %q: %v", filename, err)
+	}
+	if err := validateMetadata(metadata); err != nil {
+		return nil, fmt.Errorf("cert: invalid config in %q: %v", filename, err)
+	}
+	return (&secureConnectSource{
+		metadata: metadata,
+	}).getClientCertificate, nil
+}
+
+func validateMetadata(metadata secureConnectMetadata) error {
+	if len(metadata.Cmd) == 0 {
+		return errors.New("empty cert_provider_command")
+	}
+	return nil
+}
+
+func (s *secureConnectSource) getClientCertificate(info *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+	defaultCert.cachedCertMutex.Lock()
+	defer defaultCert.cachedCertMutex.Unlock()
+	if defaultCert.cachedCert != nil && !isCertificateExpired(defaultCert.cachedCert) {
+		return defaultCert.cachedCert, nil
+	}
+	// Expand OS environment variables in the cert provider command such as "$HOME".
+	for i := 0; i < len(s.metadata.Cmd); i++ {
+		s.metadata.Cmd[i] = os.ExpandEnv(s.metadata.Cmd[i])
+	}
+	command := s.metadata.Cmd
+	data, err := exec.Command(command[0], command[1:]...).Output()
+	if err != nil {
+		// TODO(cbro): read stderr for error message? Might contain sensitive info.
+		return nil, err
+	}
+	cert, err := tls.X509KeyPair(data, data)
+	if err != nil {
+		return nil, err
+	}
+	defaultCert.cachedCert = &cert
+	return &cert, nil
+}
+
+// isCertificateExpired returns true if the given cert is expired or invalid.
+func isCertificateExpired(cert *tls.Certificate) bool {
+	if len(cert.Certificate) == 0 {
+		return true
+	}
+	parsed, err := x509.ParseCertificate(cert.Certificate[0])
+	if err != nil {
+		return true
+	}
+	return time.Now().After(parsed.NotAfter)
+}

vendor/google.golang.org/api/transport/http/configure_http2_go116.go

@@ -0,0 +1,26 @@
+// Copyright 2021 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.16
+// +build go1.16
+
+package http
+
+import (
+	"net/http"
+	"time"
+
+	"golang.org/x/net/http2"
+)
+
+// configureHTTP2 configures the ReadIdleTimeout HTTP/2 option for the
+// transport. This allows broken idle connections to be pruned more quickly,
+// preventing the client from attempting to re-use connections that will no
+// longer work.
+func configureHTTP2(trans *http.Transport) {
+	http2Trans, err := http2.ConfigureTransports(trans)
+	if err == nil {
+		http2Trans.ReadIdleTimeout = time.Second * 31
+	}
+}

vendor/google.golang.org/api/transport/http/configure_http2_not_go116.go

@@ -0,0 +1,17 @@
+// Copyright 2021 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.16
+// +build !go1.16
+
+package http
+
+import (
+	"net/http"
+)
+
+// configureHTTP2 configures the ReadIdleTimeout HTTP/2 option for the
+// transport. The interface to do this is only available in Go 1.16 and up, so
+// this performs a no-op.
+func configureHTTP2(trans *http.Transport) {}

vendor/google.golang.org/api/transport/http/default_transport_go113.go

@@ -0,0 +1,21 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.13
+// +build go1.13
+
+package http
+
+import "net/http"
+
+// clonedTransport returns the given RoundTripper as a cloned *http.Transport.
+// It returns nil if the RoundTripper can't be cloned or coerced to
+// *http.Transport.
+func clonedTransport(rt http.RoundTripper) *http.Transport {
+	t, ok := rt.(*http.Transport)
+	if !ok {
+		return nil
+	}
+	return t.Clone()
+}

vendor/google.golang.org/api/transport/http/default_transport_not_go113.go

@@ -0,0 +1,16 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.13
+// +build !go1.13
+
+package http
+
+import "net/http"
+
+// clonedTransport returns the given RoundTripper as a cloned *http.Transport.
+// For versions of Go <1.13, this is not supported, so return nil.
+func clonedTransport(rt http.RoundTripper) *http.Transport {
+	return nil
+}

vendor/google.golang.org/api/transport/http/dial.go

@@ -0,0 +1,212 @@
+// Copyright 2015 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package http supports network connections to HTTP servers.
+// This package is not intended for use by end developers. Use the
+// google.golang.org/api/option package to configure API clients.
+package http
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"net"
+	"net/http"
+	"time"
+
+	"go.opencensus.io/plugin/ochttp"
+	"golang.org/x/oauth2"
+	"google.golang.org/api/googleapi/transport"
+	"google.golang.org/api/internal"
+	"google.golang.org/api/option"
+	"google.golang.org/api/transport/cert"
+	"google.golang.org/api/transport/http/internal/propagation"
+	"google.golang.org/api/transport/internal/dca"
+)
+
+// NewClient returns an HTTP client for use communicating with a Google cloud
+// service, configured with the given ClientOptions. It also returns the endpoint
+// for the service as specified in the options.
+func NewClient(ctx context.Context, opts ...option.ClientOption) (*http.Client, string, error) {
+	settings, err := newSettings(opts)
+	if err != nil {
+		return nil, "", err
+	}
+	clientCertSource, endpoint, err := dca.GetClientCertificateSourceAndEndpoint(settings)
+	if err != nil {
+		return nil, "", err
+	}
+	// TODO(cbro): consider injecting the User-Agent even if an explicit HTTP client is provided?
+	if settings.HTTPClient != nil {
+		return settings.HTTPClient, endpoint, nil
+	}
+	trans, err := newTransport(ctx, defaultBaseTransport(ctx, clientCertSource), settings)
+	if err != nil {
+		return nil, "", err
+	}
+	return &http.Client{Transport: trans}, endpoint, nil
+}
+
+// NewTransport creates an http.RoundTripper for use communicating with a Google
+// cloud service, configured with the given ClientOptions. Its RoundTrip method delegates to base.
+func NewTransport(ctx context.Context, base http.RoundTripper, opts ...option.ClientOption) (http.RoundTripper, error) {
+	settings, err := newSettings(opts)
+	if err != nil {
+		return nil, err
+	}
+	if settings.HTTPClient != nil {
+		return nil, errors.New("transport/http: WithHTTPClient passed to NewTransport")
+	}
+	return newTransport(ctx, base, settings)
+}
+
+func newTransport(ctx context.Context, base http.RoundTripper, settings *internal.DialSettings) (http.RoundTripper, error) {
+	paramTransport := &parameterTransport{
+		base:          base,
+		userAgent:     settings.UserAgent,
+		quotaProject:  settings.QuotaProject,
+		requestReason: settings.RequestReason,
+	}
+	var trans http.RoundTripper = paramTransport
+	trans = addOCTransport(trans, settings)
+	switch {
+	case settings.NoAuth:
+		// Do nothing.
+	case settings.APIKey != "":
+		trans = &transport.APIKey{
+			Transport: trans,
+			Key:       settings.APIKey,
+		}
+	default:
+		creds, err := internal.Creds(ctx, settings)
+		if err != nil {
+			return nil, err
+		}
+		if paramTransport.quotaProject == "" {
+			paramTransport.quotaProject = internal.QuotaProjectFromCreds(creds)
+		}
+
+		ts := creds.TokenSource
+		if settings.ImpersonationConfig == nil && settings.TokenSource != nil {
+			ts = settings.TokenSource
+		}
+		trans = &oauth2.Transport{
+			Base:   trans,
+			Source: ts,
+		}
+	}
+	return trans, nil
+}
+
+func newSettings(opts []option.ClientOption) (*internal.DialSettings, error) {
+	var o internal.DialSettings
+	for _, opt := range opts {
+		opt.Apply(&o)
+	}
+	if err := o.Validate(); err != nil {
+		return nil, err
+	}
+	if o.GRPCConn != nil {
+		return nil, errors.New("unsupported gRPC connection specified")
+	}
+	return &o, nil
+}
+
+type parameterTransport struct {
+	userAgent     string
+	quotaProject  string
+	requestReason string
+
+	base http.RoundTripper
+}
+
+func (t *parameterTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	rt := t.base
+	if rt == nil {
+		return nil, errors.New("transport: no Transport specified")
+	}
+	newReq := *req
+	newReq.Header = make(http.Header)
+	for k, vv := range req.Header {
+		newReq.Header[k] = vv
+	}
+	if t.userAgent != "" {
+		// TODO(cbro): append to existing User-Agent header?
+		newReq.Header.Set("User-Agent", t.userAgent)
+	}
+
+	// Attach system parameters into the header
+	if t.quotaProject != "" {
+		newReq.Header.Set("X-Goog-User-Project", t.quotaProject)
+	}
+	if t.requestReason != "" {
+		newReq.Header.Set("X-Goog-Request-Reason", t.requestReason)
+	}
+
+	return rt.RoundTrip(&newReq)
+}
+
+// Set at init time by dial_appengine.go. If nil, we're not on App Engine.
+var appengineUrlfetchHook func(context.Context) http.RoundTripper
+
+// defaultBaseTransport returns the base HTTP transport.
+// On App Engine, this is urlfetch.Transport.
+// Otherwise, use a default transport, taking most defaults from
+// http.DefaultTransport.
+// If TLSCertificate is available, set TLSClientConfig as well.
+func defaultBaseTransport(ctx context.Context, clientCertSource cert.Source) http.RoundTripper {
+	if appengineUrlfetchHook != nil {
+		return appengineUrlfetchHook(ctx)
+	}
+
+	// Copy http.DefaultTransport except for MaxIdleConnsPerHost setting,
+	// which is increased due to reported performance issues under load in the GCS
+	// client. Transport.Clone is only available in Go 1.13 and up.
+	trans := clonedTransport(http.DefaultTransport)
+	if trans == nil {
+		trans = fallbackBaseTransport()
+	}
+	trans.MaxIdleConnsPerHost = 100
+
+	if clientCertSource != nil {
+		trans.TLSClientConfig = &tls.Config{
+			GetClientCertificate: clientCertSource,
+		}
+	}
+
+	// If possible, configure http2 transport in order to use ReadIdleTimeout
+	// setting. This can only be done in Go 1.16 and up.
+	configureHTTP2(trans)
+
+	return trans
+}
+
+// fallbackBaseTransport is used in <go1.13 as well as in the rare case if
+// http.DefaultTransport has been reassigned something that's not a
+// *http.Transport.
+func fallbackBaseTransport() *http.Transport {
+	return &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+			DualStack: true,
+		}).DialContext,
+		MaxIdleConns:          100,
+		MaxIdleConnsPerHost:   100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+}
+
+func addOCTransport(trans http.RoundTripper, settings *internal.DialSettings) http.RoundTripper {
+	if settings.TelemetryDisabled {
+		return trans
+	}
+	return &ochttp.Transport{
+		Base:        trans,
+		Propagation: &propagation.HTTPFormat{},
+	}
+}

vendor/google.golang.org/api/transport/http/dial_appengine.go

@@ -0,0 +1,21 @@
+// Copyright 2016 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build appengine
+// +build appengine
+
+package http
+
+import (
+	"context"
+	"net/http"
+
+	"google.golang.org/appengine/urlfetch"
+)
+
+func init() {
+	appengineUrlfetchHook = func(ctx context.Context) http.RoundTripper {
+		return &urlfetch.Transport{Context: ctx}
+	}
+}

vendor/google.golang.org/api/transport/http/internal/propagation/http.go

@@ -0,0 +1,87 @@
+// Copyright 2018 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.8
+// +build go1.8
+
+// Package propagation implements X-Cloud-Trace-Context header propagation used
+// by Google Cloud products.
+package propagation
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"go.opencensus.io/trace"
+	"go.opencensus.io/trace/propagation"
+)
+
+const (
+	httpHeaderMaxSize = 200
+	httpHeader        = `X-Cloud-Trace-Context`
+)
+
+var _ propagation.HTTPFormat = (*HTTPFormat)(nil)
+
+// HTTPFormat implements propagation.HTTPFormat to propagate
+// traces in HTTP headers for Google Cloud Platform and Stackdriver Trace.
+type HTTPFormat struct{}
+
+// SpanContextFromRequest extracts a Stackdriver Trace span context from incoming requests.
+func (f *HTTPFormat) SpanContextFromRequest(req *http.Request) (sc trace.SpanContext, ok bool) {
+	h := req.Header.Get(httpHeader)
+	// See https://cloud.google.com/trace/docs/faq for the header HTTPFormat.
+	// Return if the header is empty or missing, or if the header is unreasonably
+	// large, to avoid making unnecessary copies of a large string.
+	if h == "" || len(h) > httpHeaderMaxSize {
+		return trace.SpanContext{}, false
+	}
+
+	// Parse the trace id field.
+	slash := strings.Index(h, `/`)
+	if slash == -1 {
+		return trace.SpanContext{}, false
+	}
+	tid, h := h[:slash], h[slash+1:]
+
+	buf, err := hex.DecodeString(tid)
+	if err != nil {
+		return trace.SpanContext{}, false
+	}
+	copy(sc.TraceID[:], buf)
+
+	// Parse the span id field.
+	spanstr := h
+	semicolon := strings.Index(h, `;`)
+	if semicolon != -1 {
+		spanstr, h = h[:semicolon], h[semicolon+1:]
+	}
+	sid, err := strconv.ParseUint(spanstr, 10, 64)
+	if err != nil {
+		return trace.SpanContext{}, false
+	}
+	binary.BigEndian.PutUint64(sc.SpanID[:], sid)
+
+	// Parse the options field, options field is optional.
+	if !strings.HasPrefix(h, "o=") {
+		return sc, true
+	}
+	o, err := strconv.ParseUint(h[2:], 10, 64)
+	if err != nil {
+		return trace.SpanContext{}, false
+	}
+	sc.TraceOptions = trace.TraceOptions(o)
+	return sc, true
+}
+
+// SpanContextToRequest modifies the given request to include a Stackdriver Trace header.
+func (f *HTTPFormat) SpanContextToRequest(sc trace.SpanContext, req *http.Request) {
+	sid := binary.BigEndian.Uint64(sc.SpanID[:])
+	header := fmt.Sprintf("%s/%d;o=%d", hex.EncodeToString(sc.TraceID[:]), sid, int64(sc.TraceOptions))
+	req.Header.Set(httpHeader, header)
+}

vendor/google.golang.org/api/transport/internal/dca/dca.go

@@ -0,0 +1,143 @@
+// Copyright 2020 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package dca contains utils for implementing Device Certificate
+// Authentication according to https://google.aip.dev/auth/4114
+//
+// The overall logic for DCA is as follows:
+// 1. If both endpoint override and client certificate are specified, use them as is.
+// 2. If user does not specify client certificate, we will attempt to use default
+//    client certificate.
+// 3. If user does not specify endpoint override, we will use defaultMtlsEndpoint if
+//    client certificate is available and defaultEndpoint otherwise.
+//
+// Implications of the above logic:
+// 1. If the user specifies a non-mTLS endpoint override but client certificate is
+//    available, we will pass along the cert anyway and let the server decide what to do.
+// 2. If the user specifies an mTLS endpoint override but client certificate is not
+//    available, we will not fail-fast, but let backend throw error when connecting.
+//
+// We would like to avoid introducing client-side logic that parses whether the
+// endpoint override is an mTLS url, since the url pattern may change at anytime.
+//
+// This package is not intended for use by end developers. Use the
+// google.golang.org/api/option package to configure API clients.
+package dca
+
+import (
+	"net/url"
+	"os"
+	"strings"
+
+	"google.golang.org/api/internal"
+	"google.golang.org/api/transport/cert"
+)
+
+const (
+	mTLSModeAlways = "always"
+	mTLSModeNever  = "never"
+	mTLSModeAuto   = "auto"
+)
+
+// GetClientCertificateSourceAndEndpoint is a convenience function that invokes
+// getClientCertificateSource and getEndpoint sequentially and returns the client
+// cert source and endpoint as a tuple.
+func GetClientCertificateSourceAndEndpoint(settings *internal.DialSettings) (cert.Source, string, error) {
+	clientCertSource, err := getClientCertificateSource(settings)
+	if err != nil {
+		return nil, "", err
+	}
+	endpoint, err := getEndpoint(settings, clientCertSource)
+	if err != nil {
+		return nil, "", err
+	}
+	return clientCertSource, endpoint, nil
+}
+
+// getClientCertificateSource returns a default client certificate source, if
+// not provided by the user.
+//
+// A nil default source can be returned if the source does not exist. Any exceptions
+// encountered while initializing the default source will be reported as client
+// error (ex. corrupt metadata file).
+//
+// Important Note: For now, the environment variable GOOGLE_API_USE_CLIENT_CERTIFICATE
+// must be set to "true" to allow certificate to be used (including user provided
+// certificates). For details, see AIP-4114.
+func getClientCertificateSource(settings *internal.DialSettings) (cert.Source, error) {
+	if !isClientCertificateEnabled() {
+		return nil, nil
+	} else if settings.ClientCertSource != nil {
+		return settings.ClientCertSource, nil
+	} else {
+		return cert.DefaultSource()
+	}
+}
+
+func isClientCertificateEnabled() bool {
+	useClientCert := os.Getenv("GOOGLE_API_USE_CLIENT_CERTIFICATE")
+	// TODO(andyrzhao): Update default to return "true" after DCA feature is fully released.
+	return strings.ToLower(useClientCert) == "true"
+}
+
+// getEndpoint returns the endpoint for the service, taking into account the
+// user-provided endpoint override "settings.Endpoint".
+//
+// If no endpoint override is specified, we will either return the default endpoint or
+// the default mTLS endpoint if a client certificate is available.
+//
+// You can override the default endpoint choice (mtls vs. regular) by setting the
+// GOOGLE_API_USE_MTLS_ENDPOINT environment variable.
+//
+// If the endpoint override is an address (host:port) rather than full base
+// URL (ex. https://...), then the user-provided address will be merged into
+// the default endpoint. For example, WithEndpoint("myhost:8000") and
+// WithDefaultEndpoint("https://foo.com/bar/baz") will return "https://myhost:8080/bar/baz"
+func getEndpoint(settings *internal.DialSettings, clientCertSource cert.Source) (string, error) {
+	if settings.Endpoint == "" {
+		mtlsMode := getMTLSMode()
+		if mtlsMode == mTLSModeAlways || (clientCertSource != nil && mtlsMode == mTLSModeAuto) {
+			return settings.DefaultMTLSEndpoint, nil
+		}
+		return settings.DefaultEndpoint, nil
+	}
+	if strings.Contains(settings.Endpoint, "://") {
+		// User passed in a full URL path, use it verbatim.
+		return settings.Endpoint, nil
+	}
+	if settings.DefaultEndpoint == "" {
+		// If DefaultEndpoint is not configured, use the user provided endpoint verbatim.
+		// This allows a naked "host[:port]" URL to be used with GRPC Direct Path.
+		return settings.Endpoint, nil
+	}
+
+	// Assume user-provided endpoint is host[:port], merge it with the default endpoint.
+	return mergeEndpoints(settings.DefaultEndpoint, settings.Endpoint)
+}
+
+func getMTLSMode() string {
+	mode := os.Getenv("GOOGLE_API_USE_MTLS_ENDPOINT")
+	if mode == "" {
+		mode = os.Getenv("GOOGLE_API_USE_MTLS") // Deprecated.
+	}
+	if mode == "" {
+		return mTLSModeAuto
+	}
+	return strings.ToLower(mode)
+}
+
+func mergeEndpoints(baseURL, newHost string) (string, error) {
+	u, err := url.Parse(fixScheme(baseURL))
+	if err != nil {
+		return "", err
+	}
+	return strings.Replace(baseURL, u.Host, newHost, 1), nil
+}
+
+func fixScheme(baseURL string) string {
+	if !strings.Contains(baseURL, "://") {
+		return "https://" + baseURL
+	}
+	return baseURL
+}

vendor/google.golang.org/appengine/.travis.yml

@@ -0,0 +1,18 @@
+language: go
+
+go_import_path: google.golang.org/appengine
+
+install:
+  - ./travis_install.sh
+
+script:
+  - ./travis_test.sh
+
+matrix:
+  include:
+    - go: 1.9.x
+      env: GOAPP=true
+    - go: 1.10.x
+      env: GOAPP=false
+    - go: 1.11.x
+      env: GO111MODULE=on

vendor/google.golang.org/appengine/CONTRIBUTING.md

@@ -0,0 +1,90 @@
+# Contributing
+
+1. Sign one of the contributor license agreements below.
+1. Get the package:
+
+    `go get -d google.golang.org/appengine`
+1. Change into the checked out source:
+
+    `cd $GOPATH/src/google.golang.org/appengine`
+1. Fork the repo.
+1. Set your fork as a remote:
+
+    `git remote add fork git@github.com:GITHUB_USERNAME/appengine.git`
+1. Make changes, commit to your fork.
+1. Send a pull request with your changes. 
+   The first line of your commit message is conventionally a one-line summary of the change, prefixed by the primary affected package, and is used as the title of your pull request.
+
+# Testing
+
+## Running system tests
+
+Download and install the [Go App Engine SDK](https://cloud.google.com/appengine/docs/go/download). Make sure the `go_appengine` dir is in your `PATH`.
+
+Set the `APPENGINE_DEV_APPSERVER` environment variable to `/path/to/go_appengine/dev_appserver.py`.
+
+Run tests with `goapp test`:
+
+```
+goapp test -v google.golang.org/appengine/...
+```
+
+## Contributor License Agreements
+
+Before we can accept your pull requests you'll need to sign a Contributor
+License Agreement (CLA):
+
+- **If you are an individual writing original source code** and **you own the
+intellectual property**, then you'll need to sign an [individual CLA][indvcla].
+- **If you work for a company that wants to allow you to contribute your work**,
+then you'll need to sign a [corporate CLA][corpcla].
+
+You can sign these electronically (just scroll to the bottom). After that,
+we'll be able to accept your pull requests.
+
+## Contributor Code of Conduct
+
+As contributors and maintainers of this project,
+and in the interest of fostering an open and welcoming community,
+we pledge to respect all people who contribute through reporting issues,
+posting feature requests, updating documentation,
+submitting pull requests or patches, and other activities.
+
+We are committed to making participation in this project
+a harassment-free experience for everyone,
+regardless of level of experience, gender, gender identity and expression,
+sexual orientation, disability, personal appearance,
+body size, race, ethnicity, age, religion, or nationality.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery
+* Personal attacks
+* Trolling or insulting/derogatory comments
+* Public or private harassment
+* Publishing other's private information,
+such as physical or electronic
+addresses, without explicit permission
+* Other unethical or unprofessional conduct.
+
+Project maintainers have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct.
+By adopting this Code of Conduct,
+project maintainers commit themselves to fairly and consistently
+applying these principles to every aspect of managing this project.
+Project maintainers who do not follow or enforce the Code of Conduct
+may be permanently removed from the project team.
+
+This code of conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior
+may be reported by opening an issue
+or contacting one or more of the project maintainers.
+
+This Code of Conduct is adapted from the [Contributor Covenant](http://contributor-covenant.org), version 1.2.0,
+available at [http://contributor-covenant.org/version/1/2/0/](http://contributor-covenant.org/version/1/2/0/)
+
+[indvcla]: https://developers.google.com/open-source/cla/individual
+[corpcla]: https://developers.google.com/open-source/cla/corporate

vendor/google.golang.org/appengine/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      designated in writing by the copyright owner as "Not a Contribution."
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+          notices within Derivative Works that You distribute, alongside
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+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+
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+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      Work (including but not limited to damages for loss of goodwill,
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
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+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/google.golang.org/appengine/README.md

@@ -0,0 +1,100 @@
+# Go App Engine packages
+
+[![Build Status](https://travis-ci.org/golang/appengine.svg)](https://travis-ci.org/golang/appengine)
+
+This repository supports the Go runtime on *App Engine standard*.
+It provides APIs for interacting with App Engine services.
+Its canonical import path is `google.golang.org/appengine`.
+
+See https://cloud.google.com/appengine/docs/go/
+for more information.
+
+File issue reports and feature requests on the [GitHub's issue
+tracker](https://github.com/golang/appengine/issues).
+
+## Upgrading an App Engine app to the flexible environment
+
+This package does not work on *App Engine flexible*.
+
+There are many differences between the App Engine standard environment and
+the flexible environment.
+
+See the [documentation on upgrading to the flexible environment](https://cloud.google.com/appengine/docs/flexible/go/upgrading).
+
+## Directory structure
+
+The top level directory of this repository is the `appengine` package. It
+contains the
+basic APIs (e.g. `appengine.NewContext`) that apply across APIs. Specific API
+packages are in subdirectories (e.g. `datastore`).
+
+There is an `internal` subdirectory that contains service protocol buffers,
+plus packages required for connectivity to make API calls. App Engine apps
+should not directly import any package under `internal`.
+
+## Updating from legacy (`import "appengine"`) packages
+
+If you're currently using the bare `appengine` packages
+(that is, not these ones, imported via `google.golang.org/appengine`),
+then you can use the `aefix` tool to help automate an upgrade to these packages.
+
+Run `go get google.golang.org/appengine/cmd/aefix` to install it.
+
+### 1. Update import paths
+
+The import paths for App Engine packages are now fully qualified, based at `google.golang.org/appengine`.
+You will need to update your code to use import paths starting with that; for instance,
+code importing `appengine/datastore` will now need to import `google.golang.org/appengine/datastore`.
+
+### 2. Update code using deprecated, removed or modified APIs
+
+Most App Engine services are available with exactly the same API.
+A few APIs were cleaned up, and there are some differences:
+
+* `appengine.Context` has been replaced with the `Context` type from `golang.org/x/net/context`.
+* Logging methods that were on `appengine.Context` are now functions in `google.golang.org/appengine/log`.
+* `appengine.Timeout` has been removed. Use `context.WithTimeout` instead.
+* `appengine.Datacenter` now takes a `context.Context` argument.
+* `datastore.PropertyLoadSaver` has been simplified to use slices in place of channels.
+* `delay.Call` now returns an error.
+* `search.FieldLoadSaver` now handles document metadata.
+* `urlfetch.Transport` no longer has a Deadline field; set a deadline on the
+  `context.Context` instead.
+* `aetest` no longer declares its own Context type, and uses the standard one instead.
+* `taskqueue.QueueStats` no longer takes a maxTasks argument. That argument has been
+  deprecated and unused for a long time.
+* `appengine.BackendHostname` and `appengine.BackendInstance` were for the deprecated backends feature.
+  Use `appengine.ModuleHostname`and `appengine.ModuleName` instead.
+* Most of `appengine/file` and parts of `appengine/blobstore` are deprecated.
+  Use [Google Cloud Storage](https://godoc.org/cloud.google.com/go/storage) if the
+  feature you require is not present in the new
+  [blobstore package](https://google.golang.org/appengine/blobstore).
+* `appengine/socket` is not required on App Engine flexible environment / Managed VMs.
+  Use the standard `net` package instead.
+
+## Key Encode/Decode compatibiltiy to help with datastore library migrations
+
+Key compatibility updates have been added to help customers transition from google.golang.org/appengine/datastore to cloud.google.com/go/datastore.
+The `EnableKeyConversion` enables automatic conversion from a key encoded with cloud.google.com/go/datastore to google.golang.org/appengine/datastore key type.
+
+### Enabling key conversion
+
+Enable key conversion by calling `EnableKeyConversion(ctx)` in the `/_ah/start` handler for basic and manual scaling or any handler in automatic scaling.
+
+#### 1. Basic or manual scaling
+
+This start handler will enable key conversion for all handlers in the service.
+
+```
+http.HandleFunc("/_ah/start", func(w http.ResponseWriter, r *http.Request) {
+    datastore.EnableKeyConversion(appengine.NewContext(r))
+})
+```
+
+#### 2. Automatic scaling
+
+`/_ah/start` is not supported for automatic scaling and `/_ah/warmup` is not guaranteed to run, so you must call `datastore.EnableKeyConversion(appengine.NewContext(r))`
+before you use code that needs key conversion.
+
+You may want to add this to each of your handlers, or introduce middleware where it's called.
+`EnableKeyConversion` is safe for concurrent use. Any call to it after the first is ignored.

vendor/google.golang.org/appengine/appengine.go

@@ -0,0 +1,135 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// Package appengine provides basic functionality for Google App Engine.
+//
+// For more information on how to write Go apps for Google App Engine, see:
+// https://cloud.google.com/appengine/docs/go/
+package appengine // import "google.golang.org/appengine"
+
+import (
+	"net/http"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+)
+
+// The gophers party all night; the rabbits provide the beats.
+
+// Main is the principal entry point for an app running in App Engine.
+//
+// On App Engine Flexible it installs a trivial health checker if one isn't
+// already registered, and starts listening on port 8080 (overridden by the
+// $PORT environment variable).
+//
+// See https://cloud.google.com/appengine/docs/flexible/custom-runtimes#health_check_requests
+// for details on how to do your own health checking.
+//
+// On App Engine Standard it ensures the server has started and is prepared to
+// receive requests.
+//
+// Main never returns.
+//
+// Main is designed so that the app's main package looks like this:
+//
+//      package main
+//
+//      import (
+//              "google.golang.org/appengine"
+//
+//              _ "myapp/package0"
+//              _ "myapp/package1"
+//      )
+//
+//      func main() {
+//              appengine.Main()
+//      }
+//
+// The "myapp/packageX" packages are expected to register HTTP handlers
+// in their init functions.
+func Main() {
+	internal.Main()
+}
+
+// IsDevAppServer reports whether the App Engine app is running in the
+// development App Server.
+func IsDevAppServer() bool {
+	return internal.IsDevAppServer()
+}
+
+// IsStandard reports whether the App Engine app is running in the standard
+// environment. This includes both the first generation runtimes (<= Go 1.9)
+// and the second generation runtimes (>= Go 1.11).
+func IsStandard() bool {
+	return internal.IsStandard()
+}
+
+// IsFlex reports whether the App Engine app is running in the flexible environment.
+func IsFlex() bool {
+	return internal.IsFlex()
+}
+
+// IsAppEngine reports whether the App Engine app is running on App Engine, in either
+// the standard or flexible environment.
+func IsAppEngine() bool {
+	return internal.IsAppEngine()
+}
+
+// IsSecondGen reports whether the App Engine app is running on the second generation
+// runtimes (>= Go 1.11).
+func IsSecondGen() bool {
+	return internal.IsSecondGen()
+}
+
+// NewContext returns a context for an in-flight HTTP request.
+// This function is cheap.
+func NewContext(req *http.Request) context.Context {
+	return internal.ReqContext(req)
+}
+
+// WithContext returns a copy of the parent context
+// and associates it with an in-flight HTTP request.
+// This function is cheap.
+func WithContext(parent context.Context, req *http.Request) context.Context {
+	return internal.WithContext(parent, req)
+}
+
+// BlobKey is a key for a blobstore blob.
+//
+// Conceptually, this type belongs in the blobstore package, but it lives in
+// the appengine package to avoid a circular dependency: blobstore depends on
+// datastore, and datastore needs to refer to the BlobKey type.
+type BlobKey string
+
+// GeoPoint represents a location as latitude/longitude in degrees.
+type GeoPoint struct {
+	Lat, Lng float64
+}
+
+// Valid returns whether a GeoPoint is within [-90, 90] latitude and [-180, 180] longitude.
+func (g GeoPoint) Valid() bool {
+	return -90 <= g.Lat && g.Lat <= 90 && -180 <= g.Lng && g.Lng <= 180
+}
+
+// APICallFunc defines a function type for handling an API call.
+// See WithCallOverride.
+type APICallFunc func(ctx context.Context, service, method string, in, out proto.Message) error
+
+// WithAPICallFunc returns a copy of the parent context
+// that will cause API calls to invoke f instead of their normal operation.
+//
+// This is intended for advanced users only.
+func WithAPICallFunc(ctx context.Context, f APICallFunc) context.Context {
+	return internal.WithCallOverride(ctx, internal.CallOverrideFunc(f))
+}
+
+// APICall performs an API call.
+//
+// This is not intended for general use; it is exported for use in conjunction
+// with WithAPICallFunc.
+func APICall(ctx context.Context, service, method string, in, out proto.Message) error {
+	return internal.Call(ctx, service, method, in, out)
+}

vendor/google.golang.org/appengine/appengine_vm.go

@@ -0,0 +1,21 @@
+// Copyright 2015 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build !appengine
+// +build !appengine
+
+package appengine
+
+import (
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+)
+
+// BackgroundContext returns a context not associated with a request.
+// This should only be used when not servicing a request.
+// This only works in App Engine "flexible environment".
+func BackgroundContext() context.Context {
+	return internal.BackgroundContext()
+}

vendor/google.golang.org/appengine/errors.go

@@ -0,0 +1,46 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// This file provides error functions for common API failure modes.
+
+package appengine
+
+import (
+	"fmt"
+
+	"google.golang.org/appengine/internal"
+)
+
+// IsOverQuota reports whether err represents an API call failure
+// due to insufficient available quota.
+func IsOverQuota(err error) bool {
+	callErr, ok := err.(*internal.CallError)
+	return ok && callErr.Code == 4
+}
+
+// MultiError is returned by batch operations when there are errors with
+// particular elements. Errors will be in a one-to-one correspondence with
+// the input elements; successful elements will have a nil entry.
+type MultiError []error
+
+func (m MultiError) Error() string {
+	s, n := "", 0
+	for _, e := range m {
+		if e != nil {
+			if n == 0 {
+				s = e.Error()
+			}
+			n++
+		}
+	}
+	switch n {
+	case 0:
+		return "(0 errors)"
+	case 1:
+		return s
+	case 2:
+		return s + " (and 1 other error)"
+	}
+	return fmt.Sprintf("%s (and %d other errors)", s, n-1)
+}

vendor/google.golang.org/appengine/identity.go

@@ -0,0 +1,142 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package appengine
+
+import (
+	"time"
+
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+	pb "google.golang.org/appengine/internal/app_identity"
+	modpb "google.golang.org/appengine/internal/modules"
+)
+
+// AppID returns the application ID for the current application.
+// The string will be a plain application ID (e.g. "appid"), with a
+// domain prefix for custom domain deployments (e.g. "example.com:appid").
+func AppID(c context.Context) string { return internal.AppID(c) }
+
+// DefaultVersionHostname returns the standard hostname of the default version
+// of the current application (e.g. "my-app.appspot.com"). This is suitable for
+// use in constructing URLs.
+func DefaultVersionHostname(c context.Context) string {
+	return internal.DefaultVersionHostname(c)
+}
+
+// ModuleName returns the module name of the current instance.
+func ModuleName(c context.Context) string {
+	return internal.ModuleName(c)
+}
+
+// ModuleHostname returns a hostname of a module instance.
+// If module is the empty string, it refers to the module of the current instance.
+// If version is empty, it refers to the version of the current instance if valid,
+// or the default version of the module of the current instance.
+// If instance is empty, ModuleHostname returns the load-balancing hostname.
+func ModuleHostname(c context.Context, module, version, instance string) (string, error) {
+	req := &modpb.GetHostnameRequest{}
+	if module != "" {
+		req.Module = &module
+	}
+	if version != "" {
+		req.Version = &version
+	}
+	if instance != "" {
+		req.Instance = &instance
+	}
+	res := &modpb.GetHostnameResponse{}
+	if err := internal.Call(c, "modules", "GetHostname", req, res); err != nil {
+		return "", err
+	}
+	return *res.Hostname, nil
+}
+
+// VersionID returns the version ID for the current application.
+// It will be of the form "X.Y", where X is specified in app.yaml,
+// and Y is a number generated when each version of the app is uploaded.
+// It does not include a module name.
+func VersionID(c context.Context) string { return internal.VersionID(c) }
+
+// InstanceID returns a mostly-unique identifier for this instance.
+func InstanceID() string { return internal.InstanceID() }
+
+// Datacenter returns an identifier for the datacenter that the instance is running in.
+func Datacenter(c context.Context) string { return internal.Datacenter(c) }
+
+// ServerSoftware returns the App Engine release version.
+// In production, it looks like "Google App Engine/X.Y.Z".
+// In the development appserver, it looks like "Development/X.Y".
+func ServerSoftware() string { return internal.ServerSoftware() }
+
+// RequestID returns a string that uniquely identifies the request.
+func RequestID(c context.Context) string { return internal.RequestID(c) }
+
+// AccessToken generates an OAuth2 access token for the specified scopes on
+// behalf of service account of this application. This token will expire after
+// the returned time.
+func AccessToken(c context.Context, scopes ...string) (token string, expiry time.Time, err error) {
+	req := &pb.GetAccessTokenRequest{Scope: scopes}
+	res := &pb.GetAccessTokenResponse{}
+
+	err = internal.Call(c, "app_identity_service", "GetAccessToken", req, res)
+	if err != nil {
+		return "", time.Time{}, err
+	}
+	return res.GetAccessToken(), time.Unix(res.GetExpirationTime(), 0), nil
+}
+
+// Certificate represents a public certificate for the app.
+type Certificate struct {
+	KeyName string
+	Data    []byte // PEM-encoded X.509 certificate
+}
+
+// PublicCertificates retrieves the public certificates for the app.
+// They can be used to verify a signature returned by SignBytes.
+func PublicCertificates(c context.Context) ([]Certificate, error) {
+	req := &pb.GetPublicCertificateForAppRequest{}
+	res := &pb.GetPublicCertificateForAppResponse{}
+	if err := internal.Call(c, "app_identity_service", "GetPublicCertificatesForApp", req, res); err != nil {
+		return nil, err
+	}
+	var cs []Certificate
+	for _, pc := range res.PublicCertificateList {
+		cs = append(cs, Certificate{
+			KeyName: pc.GetKeyName(),
+			Data:    []byte(pc.GetX509CertificatePem()),
+		})
+	}
+	return cs, nil
+}
+
+// ServiceAccount returns a string representing the service account name, in
+// the form of an email address (typically app_id@appspot.gserviceaccount.com).
+func ServiceAccount(c context.Context) (string, error) {
+	req := &pb.GetServiceAccountNameRequest{}
+	res := &pb.GetServiceAccountNameResponse{}
+
+	err := internal.Call(c, "app_identity_service", "GetServiceAccountName", req, res)
+	if err != nil {
+		return "", err
+	}
+	return res.GetServiceAccountName(), err
+}
+
+// SignBytes signs bytes using a private key unique to your application.
+func SignBytes(c context.Context, bytes []byte) (keyName string, signature []byte, err error) {
+	req := &pb.SignForAppRequest{BytesToSign: bytes}
+	res := &pb.SignForAppResponse{}
+
+	if err := internal.Call(c, "app_identity_service", "SignForApp", req, res); err != nil {
+		return "", nil, err
+	}
+	return res.GetKeyName(), res.GetSignatureBytes(), nil
+}
+
+func init() {
+	internal.RegisterErrorCodeMap("app_identity_service", pb.AppIdentityServiceError_ErrorCode_name)
+	internal.RegisterErrorCodeMap("modules", modpb.ModulesServiceError_ErrorCode_name)
+}

vendor/google.golang.org/appengine/internal/api.go

@@ -0,0 +1,679 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build !appengine
+// +build !appengine
+
+package internal
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	netcontext "golang.org/x/net/context"
+
+	basepb "google.golang.org/appengine/internal/base"
+	logpb "google.golang.org/appengine/internal/log"
+	remotepb "google.golang.org/appengine/internal/remote_api"
+)
+
+const (
+	apiPath             = "/rpc_http"
+	defaultTicketSuffix = "/default.20150612t184001.0"
+)
+
+var (
+	// Incoming headers.
+	ticketHeader       = http.CanonicalHeaderKey("X-AppEngine-API-Ticket")
+	dapperHeader       = http.CanonicalHeaderKey("X-Google-DapperTraceInfo")
+	traceHeader        = http.CanonicalHeaderKey("X-Cloud-Trace-Context")
+	curNamespaceHeader = http.CanonicalHeaderKey("X-AppEngine-Current-Namespace")
+	userIPHeader       = http.CanonicalHeaderKey("X-AppEngine-User-IP")
+	remoteAddrHeader   = http.CanonicalHeaderKey("X-AppEngine-Remote-Addr")
+	devRequestIdHeader = http.CanonicalHeaderKey("X-Appengine-Dev-Request-Id")
+
+	// Outgoing headers.
+	apiEndpointHeader      = http.CanonicalHeaderKey("X-Google-RPC-Service-Endpoint")
+	apiEndpointHeaderValue = []string{"app-engine-apis"}
+	apiMethodHeader        = http.CanonicalHeaderKey("X-Google-RPC-Service-Method")
+	apiMethodHeaderValue   = []string{"/VMRemoteAPI.CallRemoteAPI"}
+	apiDeadlineHeader      = http.CanonicalHeaderKey("X-Google-RPC-Service-Deadline")
+	apiContentType         = http.CanonicalHeaderKey("Content-Type")
+	apiContentTypeValue    = []string{"application/octet-stream"}
+	logFlushHeader         = http.CanonicalHeaderKey("X-AppEngine-Log-Flush-Count")
+
+	apiHTTPClient = &http.Client{
+		Transport: &http.Transport{
+			Proxy:               http.ProxyFromEnvironment,
+			Dial:                limitDial,
+			MaxIdleConns:        1000,
+			MaxIdleConnsPerHost: 10000,
+			IdleConnTimeout:     90 * time.Second,
+		},
+	}
+
+	defaultTicketOnce     sync.Once
+	defaultTicket         string
+	backgroundContextOnce sync.Once
+	backgroundContext     netcontext.Context
+)
+
+func apiURL() *url.URL {
+	host, port := "appengine.googleapis.internal", "10001"
+	if h := os.Getenv("API_HOST"); h != "" {
+		host = h
+	}
+	if p := os.Getenv("API_PORT"); p != "" {
+		port = p
+	}
+	return &url.URL{
+		Scheme: "http",
+		Host:   host + ":" + port,
+		Path:   apiPath,
+	}
+}
+
+func handleHTTP(w http.ResponseWriter, r *http.Request) {
+	c := &context{
+		req:       r,
+		outHeader: w.Header(),
+		apiURL:    apiURL(),
+	}
+	r = r.WithContext(withContext(r.Context(), c))
+	c.req = r
+
+	stopFlushing := make(chan int)
+
+	// Patch up RemoteAddr so it looks reasonable.
+	if addr := r.Header.Get(userIPHeader); addr != "" {
+		r.RemoteAddr = addr
+	} else if addr = r.Header.Get(remoteAddrHeader); addr != "" {
+		r.RemoteAddr = addr
+	} else {
+		// Should not normally reach here, but pick a sensible default anyway.
+		r.RemoteAddr = "127.0.0.1"
+	}
+	// The address in the headers will most likely be of these forms:
+	//	123.123.123.123
+	//	2001:db8::1
+	// net/http.Request.RemoteAddr is specified to be in "IP:port" form.
+	if _, _, err := net.SplitHostPort(r.RemoteAddr); err != nil {
+		// Assume the remote address is only a host; add a default port.
+		r.RemoteAddr = net.JoinHostPort(r.RemoteAddr, "80")
+	}
+
+	// Start goroutine responsible for flushing app logs.
+	// This is done after adding c to ctx.m (and stopped before removing it)
+	// because flushing logs requires making an API call.
+	go c.logFlusher(stopFlushing)
+
+	executeRequestSafely(c, r)
+	c.outHeader = nil // make sure header changes aren't respected any more
+
+	stopFlushing <- 1 // any logging beyond this point will be dropped
+
+	// Flush any pending logs asynchronously.
+	c.pendingLogs.Lock()
+	flushes := c.pendingLogs.flushes
+	if len(c.pendingLogs.lines) > 0 {
+		flushes++
+	}
+	c.pendingLogs.Unlock()
+	flushed := make(chan struct{})
+	go func() {
+		defer close(flushed)
+		// Force a log flush, because with very short requests we
+		// may not ever flush logs.
+		c.flushLog(true)
+	}()
+	w.Header().Set(logFlushHeader, strconv.Itoa(flushes))
+
+	// Avoid nil Write call if c.Write is never called.
+	if c.outCode != 0 {
+		w.WriteHeader(c.outCode)
+	}
+	if c.outBody != nil {
+		w.Write(c.outBody)
+	}
+	// Wait for the last flush to complete before returning,
+	// otherwise the security ticket will not be valid.
+	<-flushed
+}
+
+func executeRequestSafely(c *context, r *http.Request) {
+	defer func() {
+		if x := recover(); x != nil {
+			logf(c, 4, "%s", renderPanic(x)) // 4 == critical
+			c.outCode = 500
+		}
+	}()
+
+	http.DefaultServeMux.ServeHTTP(c, r)
+}
+
+func renderPanic(x interface{}) string {
+	buf := make([]byte, 16<<10) // 16 KB should be plenty
+	buf = buf[:runtime.Stack(buf, false)]
+
+	// Remove the first few stack frames:
+	//   this func
+	//   the recover closure in the caller
+	// That will root the stack trace at the site of the panic.
+	const (
+		skipStart  = "internal.renderPanic"
+		skipFrames = 2
+	)
+	start := bytes.Index(buf, []byte(skipStart))
+	p := start
+	for i := 0; i < skipFrames*2 && p+1 < len(buf); i++ {
+		p = bytes.IndexByte(buf[p+1:], '\n') + p + 1
+		if p < 0 {
+			break
+		}
+	}
+	if p >= 0 {
+		// buf[start:p+1] is the block to remove.
+		// Copy buf[p+1:] over buf[start:] and shrink buf.
+		copy(buf[start:], buf[p+1:])
+		buf = buf[:len(buf)-(p+1-start)]
+	}
+
+	// Add panic heading.
+	head := fmt.Sprintf("panic: %v\n\n", x)
+	if len(head) > len(buf) {
+		// Extremely unlikely to happen.
+		return head
+	}
+	copy(buf[len(head):], buf)
+	copy(buf, head)
+
+	return string(buf)
+}
+
+// context represents the context of an in-flight HTTP request.
+// It implements the appengine.Context and http.ResponseWriter interfaces.
+type context struct {
+	req *http.Request
+
+	outCode   int
+	outHeader http.Header
+	outBody   []byte
+
+	pendingLogs struct {
+		sync.Mutex
+		lines   []*logpb.UserAppLogLine
+		flushes int
+	}
+
+	apiURL *url.URL
+}
+
+var contextKey = "holds a *context"
+
+// jointContext joins two contexts in a superficial way.
+// It takes values and timeouts from a base context, and only values from another context.
+type jointContext struct {
+	base       netcontext.Context
+	valuesOnly netcontext.Context
+}
+
+func (c jointContext) Deadline() (time.Time, bool) {
+	return c.base.Deadline()
+}
+
+func (c jointContext) Done() <-chan struct{} {
+	return c.base.Done()
+}
+
+func (c jointContext) Err() error {
+	return c.base.Err()
+}
+
+func (c jointContext) Value(key interface{}) interface{} {
+	if val := c.base.Value(key); val != nil {
+		return val
+	}
+	return c.valuesOnly.Value(key)
+}
+
+// fromContext returns the App Engine context or nil if ctx is not
+// derived from an App Engine context.
+func fromContext(ctx netcontext.Context) *context {
+	c, _ := ctx.Value(&contextKey).(*context)
+	return c
+}
+
+func withContext(parent netcontext.Context, c *context) netcontext.Context {
+	ctx := netcontext.WithValue(parent, &contextKey, c)
+	if ns := c.req.Header.Get(curNamespaceHeader); ns != "" {
+		ctx = withNamespace(ctx, ns)
+	}
+	return ctx
+}
+
+func toContext(c *context) netcontext.Context {
+	return withContext(netcontext.Background(), c)
+}
+
+func IncomingHeaders(ctx netcontext.Context) http.Header {
+	if c := fromContext(ctx); c != nil {
+		return c.req.Header
+	}
+	return nil
+}
+
+func ReqContext(req *http.Request) netcontext.Context {
+	return req.Context()
+}
+
+func WithContext(parent netcontext.Context, req *http.Request) netcontext.Context {
+	return jointContext{
+		base:       parent,
+		valuesOnly: req.Context(),
+	}
+}
+
+// DefaultTicket returns a ticket used for background context or dev_appserver.
+func DefaultTicket() string {
+	defaultTicketOnce.Do(func() {
+		if IsDevAppServer() {
+			defaultTicket = "testapp" + defaultTicketSuffix
+			return
+		}
+		appID := partitionlessAppID()
+		escAppID := strings.Replace(strings.Replace(appID, ":", "_", -1), ".", "_", -1)
+		majVersion := VersionID(nil)
+		if i := strings.Index(majVersion, "."); i > 0 {
+			majVersion = majVersion[:i]
+		}
+		defaultTicket = fmt.Sprintf("%s/%s.%s.%s", escAppID, ModuleName(nil), majVersion, InstanceID())
+	})
+	return defaultTicket
+}
+
+func BackgroundContext() netcontext.Context {
+	backgroundContextOnce.Do(func() {
+		// Compute background security ticket.
+		ticket := DefaultTicket()
+
+		c := &context{
+			req: &http.Request{
+				Header: http.Header{
+					ticketHeader: []string{ticket},
+				},
+			},
+			apiURL: apiURL(),
+		}
+		backgroundContext = toContext(c)
+
+		// TODO(dsymonds): Wire up the shutdown handler to do a final flush.
+		go c.logFlusher(make(chan int))
+	})
+
+	return backgroundContext
+}
+
+// RegisterTestRequest registers the HTTP request req for testing, such that
+// any API calls are sent to the provided URL. It returns a closure to delete
+// the registration.
+// It should only be used by aetest package.
+func RegisterTestRequest(req *http.Request, apiURL *url.URL, decorate func(netcontext.Context) netcontext.Context) (*http.Request, func()) {
+	c := &context{
+		req:    req,
+		apiURL: apiURL,
+	}
+	ctx := withContext(decorate(req.Context()), c)
+	req = req.WithContext(ctx)
+	c.req = req
+	return req, func() {}
+}
+
+var errTimeout = &CallError{
+	Detail:  "Deadline exceeded",
+	Code:    int32(remotepb.RpcError_CANCELLED),
+	Timeout: true,
+}
+
+func (c *context) Header() http.Header { return c.outHeader }
+
+// Copied from $GOROOT/src/pkg/net/http/transfer.go. Some response status
+// codes do not permit a response body (nor response entity headers such as
+// Content-Length, Content-Type, etc).
+func bodyAllowedForStatus(status int) bool {
+	switch {
+	case status >= 100 && status <= 199:
+		return false
+	case status == 204:
+		return false
+	case status == 304:
+		return false
+	}
+	return true
+}
+
+func (c *context) Write(b []byte) (int, error) {
+	if c.outCode == 0 {
+		c.WriteHeader(http.StatusOK)
+	}
+	if len(b) > 0 && !bodyAllowedForStatus(c.outCode) {
+		return 0, http.ErrBodyNotAllowed
+	}
+	c.outBody = append(c.outBody, b...)
+	return len(b), nil
+}
+
+func (c *context) WriteHeader(code int) {
+	if c.outCode != 0 {
+		logf(c, 3, "WriteHeader called multiple times on request.") // error level
+		return
+	}
+	c.outCode = code
+}
+
+func (c *context) post(body []byte, timeout time.Duration) (b []byte, err error) {
+	hreq := &http.Request{
+		Method: "POST",
+		URL:    c.apiURL,
+		Header: http.Header{
+			apiEndpointHeader: apiEndpointHeaderValue,
+			apiMethodHeader:   apiMethodHeaderValue,
+			apiContentType:    apiContentTypeValue,
+			apiDeadlineHeader: []string{strconv.FormatFloat(timeout.Seconds(), 'f', -1, 64)},
+		},
+		Body:          ioutil.NopCloser(bytes.NewReader(body)),
+		ContentLength: int64(len(body)),
+		Host:          c.apiURL.Host,
+	}
+	if info := c.req.Header.Get(dapperHeader); info != "" {
+		hreq.Header.Set(dapperHeader, info)
+	}
+	if info := c.req.Header.Get(traceHeader); info != "" {
+		hreq.Header.Set(traceHeader, info)
+	}
+
+	tr := apiHTTPClient.Transport.(*http.Transport)
+
+	var timedOut int32 // atomic; set to 1 if timed out
+	t := time.AfterFunc(timeout, func() {
+		atomic.StoreInt32(&timedOut, 1)
+		tr.CancelRequest(hreq)
+	})
+	defer t.Stop()
+	defer func() {
+		// Check if timeout was exceeded.
+		if atomic.LoadInt32(&timedOut) != 0 {
+			err = errTimeout
+		}
+	}()
+
+	hresp, err := apiHTTPClient.Do(hreq)
+	if err != nil {
+		return nil, &CallError{
+			Detail: fmt.Sprintf("service bridge HTTP failed: %v", err),
+			Code:   int32(remotepb.RpcError_UNKNOWN),
+		}
+	}
+	defer hresp.Body.Close()
+	hrespBody, err := ioutil.ReadAll(hresp.Body)
+	if hresp.StatusCode != 200 {
+		return nil, &CallError{
+			Detail: fmt.Sprintf("service bridge returned HTTP %d (%q)", hresp.StatusCode, hrespBody),
+			Code:   int32(remotepb.RpcError_UNKNOWN),
+		}
+	}
+	if err != nil {
+		return nil, &CallError{
+			Detail: fmt.Sprintf("service bridge response bad: %v", err),
+			Code:   int32(remotepb.RpcError_UNKNOWN),
+		}
+	}
+	return hrespBody, nil
+}
+
+func Call(ctx netcontext.Context, service, method string, in, out proto.Message) error {
+	if ns := NamespaceFromContext(ctx); ns != "" {
+		if fn, ok := NamespaceMods[service]; ok {
+			fn(in, ns)
+		}
+	}
+
+	if f, ctx, ok := callOverrideFromContext(ctx); ok {
+		return f(ctx, service, method, in, out)
+	}
+
+	// Handle already-done contexts quickly.
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+	}
+
+	c := fromContext(ctx)
+	if c == nil {
+		// Give a good error message rather than a panic lower down.
+		return errNotAppEngineContext
+	}
+
+	// Apply transaction modifications if we're in a transaction.
+	if t := transactionFromContext(ctx); t != nil {
+		if t.finished {
+			return errors.New("transaction context has expired")
+		}
+		applyTransaction(in, &t.transaction)
+	}
+
+	// Default RPC timeout is 60s.
+	timeout := 60 * time.Second
+	if deadline, ok := ctx.Deadline(); ok {
+		timeout = deadline.Sub(time.Now())
+	}
+
+	data, err := proto.Marshal(in)
+	if err != nil {
+		return err
+	}
+
+	ticket := c.req.Header.Get(ticketHeader)
+	// Use a test ticket under test environment.
+	if ticket == "" {
+		if appid := ctx.Value(&appIDOverrideKey); appid != nil {
+			ticket = appid.(string) + defaultTicketSuffix
+		}
+	}
+	// Fall back to use background ticket when the request ticket is not available in Flex or dev_appserver.
+	if ticket == "" {
+		ticket = DefaultTicket()
+	}
+	if dri := c.req.Header.Get(devRequestIdHeader); IsDevAppServer() && dri != "" {
+		ticket = dri
+	}
+	req := &remotepb.Request{
+		ServiceName: &service,
+		Method:      &method,
+		Request:     data,
+		RequestId:   &ticket,
+	}
+	hreqBody, err := proto.Marshal(req)
+	if err != nil {
+		return err
+	}
+
+	hrespBody, err := c.post(hreqBody, timeout)
+	if err != nil {
+		return err
+	}
+
+	res := &remotepb.Response{}
+	if err := proto.Unmarshal(hrespBody, res); err != nil {
+		return err
+	}
+	if res.RpcError != nil {
+		ce := &CallError{
+			Detail: res.RpcError.GetDetail(),
+			Code:   *res.RpcError.Code,
+		}
+		switch remotepb.RpcError_ErrorCode(ce.Code) {
+		case remotepb.RpcError_CANCELLED, remotepb.RpcError_DEADLINE_EXCEEDED:
+			ce.Timeout = true
+		}
+		return ce
+	}
+	if res.ApplicationError != nil {
+		return &APIError{
+			Service: *req.ServiceName,
+			Detail:  res.ApplicationError.GetDetail(),
+			Code:    *res.ApplicationError.Code,
+		}
+	}
+	if res.Exception != nil || res.JavaException != nil {
+		// This shouldn't happen, but let's be defensive.
+		return &CallError{
+			Detail: "service bridge returned exception",
+			Code:   int32(remotepb.RpcError_UNKNOWN),
+		}
+	}
+	return proto.Unmarshal(res.Response, out)
+}
+
+func (c *context) Request() *http.Request {
+	return c.req
+}
+
+func (c *context) addLogLine(ll *logpb.UserAppLogLine) {
+	// Truncate long log lines.
+	// TODO(dsymonds): Check if this is still necessary.
+	const lim = 8 << 10
+	if len(*ll.Message) > lim {
+		suffix := fmt.Sprintf("...(length %d)", len(*ll.Message))
+		ll.Message = proto.String((*ll.Message)[:lim-len(suffix)] + suffix)
+	}
+
+	c.pendingLogs.Lock()
+	c.pendingLogs.lines = append(c.pendingLogs.lines, ll)
+	c.pendingLogs.Unlock()
+}
+
+var logLevelName = map[int64]string{
+	0: "DEBUG",
+	1: "INFO",
+	2: "WARNING",
+	3: "ERROR",
+	4: "CRITICAL",
+}
+
+func logf(c *context, level int64, format string, args ...interface{}) {
+	if c == nil {
+		panic("not an App Engine context")
+	}
+	s := fmt.Sprintf(format, args...)
+	s = strings.TrimRight(s, "\n") // Remove any trailing newline characters.
+	c.addLogLine(&logpb.UserAppLogLine{
+		TimestampUsec: proto.Int64(time.Now().UnixNano() / 1e3),
+		Level:         &level,
+		Message:       &s,
+	})
+	// Only duplicate log to stderr if not running on App Engine second generation
+	if !IsSecondGen() {
+		log.Print(logLevelName[level] + ": " + s)
+	}
+}
+
+// flushLog attempts to flush any pending logs to the appserver.
+// It should not be called concurrently.
+func (c *context) flushLog(force bool) (flushed bool) {
+	c.pendingLogs.Lock()
+	// Grab up to 30 MB. We can get away with up to 32 MB, but let's be cautious.
+	n, rem := 0, 30<<20
+	for ; n < len(c.pendingLogs.lines); n++ {
+		ll := c.pendingLogs.lines[n]
+		// Each log line will require about 3 bytes of overhead.
+		nb := proto.Size(ll) + 3
+		if nb > rem {
+			break
+		}
+		rem -= nb
+	}
+	lines := c.pendingLogs.lines[:n]
+	c.pendingLogs.lines = c.pendingLogs.lines[n:]
+	c.pendingLogs.Unlock()
+
+	if len(lines) == 0 && !force {
+		// Nothing to flush.
+		return false
+	}
+
+	rescueLogs := false
+	defer func() {
+		if rescueLogs {
+			c.pendingLogs.Lock()
+			c.pendingLogs.lines = append(lines, c.pendingLogs.lines...)
+			c.pendingLogs.Unlock()
+		}
+	}()
+
+	buf, err := proto.Marshal(&logpb.UserAppLogGroup{
+		LogLine: lines,
+	})
+	if err != nil {
+		log.Printf("internal.flushLog: marshaling UserAppLogGroup: %v", err)
+		rescueLogs = true
+		return false
+	}
+
+	req := &logpb.FlushRequest{
+		Logs: buf,
+	}
+	res := &basepb.VoidProto{}
+	c.pendingLogs.Lock()
+	c.pendingLogs.flushes++
+	c.pendingLogs.Unlock()
+	if err := Call(toContext(c), "logservice", "Flush", req, res); err != nil {
+		log.Printf("internal.flushLog: Flush RPC: %v", err)
+		rescueLogs = true
+		return false
+	}
+	return true
+}
+
+const (
+	// Log flushing parameters.
+	flushInterval      = 1 * time.Second
+	forceFlushInterval = 60 * time.Second
+)
+
+func (c *context) logFlusher(stop <-chan int) {
+	lastFlush := time.Now()
+	tick := time.NewTicker(flushInterval)
+	for {
+		select {
+		case <-stop:
+			// Request finished.
+			tick.Stop()
+			return
+		case <-tick.C:
+			force := time.Now().Sub(lastFlush) > forceFlushInterval
+			if c.flushLog(force) {
+				lastFlush = time.Now()
+			}
+		}
+	}
+}
+
+func ContextForTesting(req *http.Request) netcontext.Context {
+	return toContext(&context{req: req})
+}

vendor/google.golang.org/appengine/internal/api_classic.go

@@ -0,0 +1,170 @@
+// Copyright 2015 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build appengine
+// +build appengine
+
+package internal
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"appengine"
+	"appengine_internal"
+	basepb "appengine_internal/base"
+
+	"github.com/golang/protobuf/proto"
+	netcontext "golang.org/x/net/context"
+)
+
+var contextKey = "holds an appengine.Context"
+
+// fromContext returns the App Engine context or nil if ctx is not
+// derived from an App Engine context.
+func fromContext(ctx netcontext.Context) appengine.Context {
+	c, _ := ctx.Value(&contextKey).(appengine.Context)
+	return c
+}
+
+// This is only for classic App Engine adapters.
+func ClassicContextFromContext(ctx netcontext.Context) (appengine.Context, error) {
+	c := fromContext(ctx)
+	if c == nil {
+		return nil, errNotAppEngineContext
+	}
+	return c, nil
+}
+
+func withContext(parent netcontext.Context, c appengine.Context) netcontext.Context {
+	ctx := netcontext.WithValue(parent, &contextKey, c)
+
+	s := &basepb.StringProto{}
+	c.Call("__go__", "GetNamespace", &basepb.VoidProto{}, s, nil)
+	if ns := s.GetValue(); ns != "" {
+		ctx = NamespacedContext(ctx, ns)
+	}
+
+	return ctx
+}
+
+func IncomingHeaders(ctx netcontext.Context) http.Header {
+	if c := fromContext(ctx); c != nil {
+		if req, ok := c.Request().(*http.Request); ok {
+			return req.Header
+		}
+	}
+	return nil
+}
+
+func ReqContext(req *http.Request) netcontext.Context {
+	return WithContext(netcontext.Background(), req)
+}
+
+func WithContext(parent netcontext.Context, req *http.Request) netcontext.Context {
+	c := appengine.NewContext(req)
+	return withContext(parent, c)
+}
+
+type testingContext struct {
+	appengine.Context
+
+	req *http.Request
+}
+
+func (t *testingContext) FullyQualifiedAppID() string { return "dev~testcontext" }
+func (t *testingContext) Call(service, method string, _, _ appengine_internal.ProtoMessage, _ *appengine_internal.CallOptions) error {
+	if service == "__go__" && method == "GetNamespace" {
+		return nil
+	}
+	return fmt.Errorf("testingContext: unsupported Call")
+}
+func (t *testingContext) Request() interface{} { return t.req }
+
+func ContextForTesting(req *http.Request) netcontext.Context {
+	return withContext(netcontext.Background(), &testingContext{req: req})
+}
+
+func Call(ctx netcontext.Context, service, method string, in, out proto.Message) error {
+	if ns := NamespaceFromContext(ctx); ns != "" {
+		if fn, ok := NamespaceMods[service]; ok {
+			fn(in, ns)
+		}
+	}
+
+	if f, ctx, ok := callOverrideFromContext(ctx); ok {
+		return f(ctx, service, method, in, out)
+	}
+
+	// Handle already-done contexts quickly.
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+	}
+
+	c := fromContext(ctx)
+	if c == nil {
+		// Give a good error message rather than a panic lower down.
+		return errNotAppEngineContext
+	}
+
+	// Apply transaction modifications if we're in a transaction.
+	if t := transactionFromContext(ctx); t != nil {
+		if t.finished {
+			return errors.New("transaction context has expired")
+		}
+		applyTransaction(in, &t.transaction)
+	}
+
+	var opts *appengine_internal.CallOptions
+	if d, ok := ctx.Deadline(); ok {
+		opts = &appengine_internal.CallOptions{
+			Timeout: d.Sub(time.Now()),
+		}
+	}
+
+	err := c.Call(service, method, in, out, opts)
+	switch v := err.(type) {
+	case *appengine_internal.APIError:
+		return &APIError{
+			Service: v.Service,
+			Detail:  v.Detail,
+			Code:    v.Code,
+		}
+	case *appengine_internal.CallError:
+		return &CallError{
+			Detail:  v.Detail,
+			Code:    v.Code,
+			Timeout: v.Timeout,
+		}
+	}
+	return err
+}
+
+func handleHTTP(w http.ResponseWriter, r *http.Request) {
+	panic("handleHTTP called; this should be impossible")
+}
+
+func logf(c appengine.Context, level int64, format string, args ...interface{}) {
+	var fn func(format string, args ...interface{})
+	switch level {
+	case 0:
+		fn = c.Debugf
+	case 1:
+		fn = c.Infof
+	case 2:
+		fn = c.Warningf
+	case 3:
+		fn = c.Errorf
+	case 4:
+		fn = c.Criticalf
+	default:
+		// This shouldn't happen.
+		fn = c.Criticalf
+	}
+	fn(format, args...)
+}

vendor/google.golang.org/appengine/internal/api_common.go

@@ -0,0 +1,123 @@
+// Copyright 2015 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+	"errors"
+	"os"
+
+	"github.com/golang/protobuf/proto"
+	netcontext "golang.org/x/net/context"
+)
+
+var errNotAppEngineContext = errors.New("not an App Engine context")
+
+type CallOverrideFunc func(ctx netcontext.Context, service, method string, in, out proto.Message) error
+
+var callOverrideKey = "holds []CallOverrideFunc"
+
+func WithCallOverride(ctx netcontext.Context, f CallOverrideFunc) netcontext.Context {
+	// We avoid appending to any existing call override
+	// so we don't risk overwriting a popped stack below.
+	var cofs []CallOverrideFunc
+	if uf, ok := ctx.Value(&callOverrideKey).([]CallOverrideFunc); ok {
+		cofs = append(cofs, uf...)
+	}
+	cofs = append(cofs, f)
+	return netcontext.WithValue(ctx, &callOverrideKey, cofs)
+}
+
+func callOverrideFromContext(ctx netcontext.Context) (CallOverrideFunc, netcontext.Context, bool) {
+	cofs, _ := ctx.Value(&callOverrideKey).([]CallOverrideFunc)
+	if len(cofs) == 0 {
+		return nil, nil, false
+	}
+	// We found a list of overrides; grab the last, and reconstitute a
+	// context that will hide it.
+	f := cofs[len(cofs)-1]
+	ctx = netcontext.WithValue(ctx, &callOverrideKey, cofs[:len(cofs)-1])
+	return f, ctx, true
+}
+
+type logOverrideFunc func(level int64, format string, args ...interface{})
+
+var logOverrideKey = "holds a logOverrideFunc"
+
+func WithLogOverride(ctx netcontext.Context, f logOverrideFunc) netcontext.Context {
+	return netcontext.WithValue(ctx, &logOverrideKey, f)
+}
+
+var appIDOverrideKey = "holds a string, being the full app ID"
+
+func WithAppIDOverride(ctx netcontext.Context, appID string) netcontext.Context {
+	return netcontext.WithValue(ctx, &appIDOverrideKey, appID)
+}
+
+var namespaceKey = "holds the namespace string"
+
+func withNamespace(ctx netcontext.Context, ns string) netcontext.Context {
+	return netcontext.WithValue(ctx, &namespaceKey, ns)
+}
+
+func NamespaceFromContext(ctx netcontext.Context) string {
+	// If there's no namespace, return the empty string.
+	ns, _ := ctx.Value(&namespaceKey).(string)
+	return ns
+}
+
+// FullyQualifiedAppID returns the fully-qualified application ID.
+// This may contain a partition prefix (e.g. "s~" for High Replication apps),
+// or a domain prefix (e.g. "example.com:").
+func FullyQualifiedAppID(ctx netcontext.Context) string {
+	if id, ok := ctx.Value(&appIDOverrideKey).(string); ok {
+		return id
+	}
+	return fullyQualifiedAppID(ctx)
+}
+
+func Logf(ctx netcontext.Context, level int64, format string, args ...interface{}) {
+	if f, ok := ctx.Value(&logOverrideKey).(logOverrideFunc); ok {
+		f(level, format, args...)
+		return
+	}
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	logf(c, level, format, args...)
+}
+
+// NamespacedContext wraps a Context to support namespaces.
+func NamespacedContext(ctx netcontext.Context, namespace string) netcontext.Context {
+	return withNamespace(ctx, namespace)
+}
+
+// SetTestEnv sets the env variables for testing background ticket in Flex.
+func SetTestEnv() func() {
+	var environ = []struct {
+		key, value string
+	}{
+		{"GAE_LONG_APP_ID", "my-app-id"},
+		{"GAE_MINOR_VERSION", "067924799508853122"},
+		{"GAE_MODULE_INSTANCE", "0"},
+		{"GAE_MODULE_NAME", "default"},
+		{"GAE_MODULE_VERSION", "20150612t184001"},
+	}
+
+	for _, v := range environ {
+		old := os.Getenv(v.key)
+		os.Setenv(v.key, v.value)
+		v.value = old
+	}
+	return func() { // Restore old environment after the test completes.
+		for _, v := range environ {
+			if v.value == "" {
+				os.Unsetenv(v.key)
+				continue
+			}
+			os.Setenv(v.key, v.value)
+		}
+	}
+}

vendor/google.golang.org/appengine/internal/app_id.go

@@ -0,0 +1,28 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+	"strings"
+)
+
+func parseFullAppID(appid string) (partition, domain, displayID string) {
+	if i := strings.Index(appid, "~"); i != -1 {
+		partition, appid = appid[:i], appid[i+1:]
+	}
+	if i := strings.Index(appid, ":"); i != -1 {
+		domain, appid = appid[:i], appid[i+1:]
+	}
+	return partition, domain, appid
+}
+
+// appID returns "appid" or "domain.com:appid".
+func appID(fullAppID string) string {
+	_, dom, dis := parseFullAppID(fullAppID)
+	if dom != "" {
+		return dom + ":" + dis
+	}
+	return dis
+}

vendor/google.golang.org/appengine/internal/app_identity/app_identity_service.pb.go

@@ -0,0 +1,611 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google.golang.org/appengine/internal/app_identity/app_identity_service.proto
+
+package app_identity
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type AppIdentityServiceError_ErrorCode int32
+
+const (
+	AppIdentityServiceError_SUCCESS           AppIdentityServiceError_ErrorCode = 0
+	AppIdentityServiceError_UNKNOWN_SCOPE     AppIdentityServiceError_ErrorCode = 9
+	AppIdentityServiceError_BLOB_TOO_LARGE    AppIdentityServiceError_ErrorCode = 1000
+	AppIdentityServiceError_DEADLINE_EXCEEDED AppIdentityServiceError_ErrorCode = 1001
+	AppIdentityServiceError_NOT_A_VALID_APP   AppIdentityServiceError_ErrorCode = 1002
+	AppIdentityServiceError_UNKNOWN_ERROR     AppIdentityServiceError_ErrorCode = 1003
+	AppIdentityServiceError_NOT_ALLOWED       AppIdentityServiceError_ErrorCode = 1005
+	AppIdentityServiceError_NOT_IMPLEMENTED   AppIdentityServiceError_ErrorCode = 1006
+)
+
+var AppIdentityServiceError_ErrorCode_name = map[int32]string{
+	0:    "SUCCESS",
+	9:    "UNKNOWN_SCOPE",
+	1000: "BLOB_TOO_LARGE",
+	1001: "DEADLINE_EXCEEDED",
+	1002: "NOT_A_VALID_APP",
+	1003: "UNKNOWN_ERROR",
+	1005: "NOT_ALLOWED",
+	1006: "NOT_IMPLEMENTED",
+}
+var AppIdentityServiceError_ErrorCode_value = map[string]int32{
+	"SUCCESS":           0,
+	"UNKNOWN_SCOPE":     9,
+	"BLOB_TOO_LARGE":    1000,
+	"DEADLINE_EXCEEDED": 1001,
+	"NOT_A_VALID_APP":   1002,
+	"UNKNOWN_ERROR":     1003,
+	"NOT_ALLOWED":       1005,
+	"NOT_IMPLEMENTED":   1006,
+}
+
+func (x AppIdentityServiceError_ErrorCode) Enum() *AppIdentityServiceError_ErrorCode {
+	p := new(AppIdentityServiceError_ErrorCode)
+	*p = x
+	return p
+}
+func (x AppIdentityServiceError_ErrorCode) String() string {
+	return proto.EnumName(AppIdentityServiceError_ErrorCode_name, int32(x))
+}
+func (x *AppIdentityServiceError_ErrorCode) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(AppIdentityServiceError_ErrorCode_value, data, "AppIdentityServiceError_ErrorCode")
+	if err != nil {
+		return err
+	}
+	*x = AppIdentityServiceError_ErrorCode(value)
+	return nil
+}
+func (AppIdentityServiceError_ErrorCode) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{0, 0}
+}
+
+type AppIdentityServiceError struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *AppIdentityServiceError) Reset()         { *m = AppIdentityServiceError{} }
+func (m *AppIdentityServiceError) String() string { return proto.CompactTextString(m) }
+func (*AppIdentityServiceError) ProtoMessage()    {}
+func (*AppIdentityServiceError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{0}
+}
+func (m *AppIdentityServiceError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_AppIdentityServiceError.Unmarshal(m, b)
+}
+func (m *AppIdentityServiceError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_AppIdentityServiceError.Marshal(b, m, deterministic)
+}
+func (dst *AppIdentityServiceError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_AppIdentityServiceError.Merge(dst, src)
+}
+func (m *AppIdentityServiceError) XXX_Size() int {
+	return xxx_messageInfo_AppIdentityServiceError.Size(m)
+}
+func (m *AppIdentityServiceError) XXX_DiscardUnknown() {
+	xxx_messageInfo_AppIdentityServiceError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_AppIdentityServiceError proto.InternalMessageInfo
+
+type SignForAppRequest struct {
+	BytesToSign          []byte   `protobuf:"bytes,1,opt,name=bytes_to_sign,json=bytesToSign" json:"bytes_to_sign,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SignForAppRequest) Reset()         { *m = SignForAppRequest{} }
+func (m *SignForAppRequest) String() string { return proto.CompactTextString(m) }
+func (*SignForAppRequest) ProtoMessage()    {}
+func (*SignForAppRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{1}
+}
+func (m *SignForAppRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SignForAppRequest.Unmarshal(m, b)
+}
+func (m *SignForAppRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SignForAppRequest.Marshal(b, m, deterministic)
+}
+func (dst *SignForAppRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SignForAppRequest.Merge(dst, src)
+}
+func (m *SignForAppRequest) XXX_Size() int {
+	return xxx_messageInfo_SignForAppRequest.Size(m)
+}
+func (m *SignForAppRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SignForAppRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SignForAppRequest proto.InternalMessageInfo
+
+func (m *SignForAppRequest) GetBytesToSign() []byte {
+	if m != nil {
+		return m.BytesToSign
+	}
+	return nil
+}
+
+type SignForAppResponse struct {
+	KeyName              *string  `protobuf:"bytes,1,opt,name=key_name,json=keyName" json:"key_name,omitempty"`
+	SignatureBytes       []byte   `protobuf:"bytes,2,opt,name=signature_bytes,json=signatureBytes" json:"signature_bytes,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SignForAppResponse) Reset()         { *m = SignForAppResponse{} }
+func (m *SignForAppResponse) String() string { return proto.CompactTextString(m) }
+func (*SignForAppResponse) ProtoMessage()    {}
+func (*SignForAppResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{2}
+}
+func (m *SignForAppResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SignForAppResponse.Unmarshal(m, b)
+}
+func (m *SignForAppResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SignForAppResponse.Marshal(b, m, deterministic)
+}
+func (dst *SignForAppResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SignForAppResponse.Merge(dst, src)
+}
+func (m *SignForAppResponse) XXX_Size() int {
+	return xxx_messageInfo_SignForAppResponse.Size(m)
+}
+func (m *SignForAppResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SignForAppResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SignForAppResponse proto.InternalMessageInfo
+
+func (m *SignForAppResponse) GetKeyName() string {
+	if m != nil && m.KeyName != nil {
+		return *m.KeyName
+	}
+	return ""
+}
+
+func (m *SignForAppResponse) GetSignatureBytes() []byte {
+	if m != nil {
+		return m.SignatureBytes
+	}
+	return nil
+}
+
+type GetPublicCertificateForAppRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetPublicCertificateForAppRequest) Reset()         { *m = GetPublicCertificateForAppRequest{} }
+func (m *GetPublicCertificateForAppRequest) String() string { return proto.CompactTextString(m) }
+func (*GetPublicCertificateForAppRequest) ProtoMessage()    {}
+func (*GetPublicCertificateForAppRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{3}
+}
+func (m *GetPublicCertificateForAppRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetPublicCertificateForAppRequest.Unmarshal(m, b)
+}
+func (m *GetPublicCertificateForAppRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetPublicCertificateForAppRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetPublicCertificateForAppRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetPublicCertificateForAppRequest.Merge(dst, src)
+}
+func (m *GetPublicCertificateForAppRequest) XXX_Size() int {
+	return xxx_messageInfo_GetPublicCertificateForAppRequest.Size(m)
+}
+func (m *GetPublicCertificateForAppRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetPublicCertificateForAppRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetPublicCertificateForAppRequest proto.InternalMessageInfo
+
+type PublicCertificate struct {
+	KeyName              *string  `protobuf:"bytes,1,opt,name=key_name,json=keyName" json:"key_name,omitempty"`
+	X509CertificatePem   *string  `protobuf:"bytes,2,opt,name=x509_certificate_pem,json=x509CertificatePem" json:"x509_certificate_pem,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *PublicCertificate) Reset()         { *m = PublicCertificate{} }
+func (m *PublicCertificate) String() string { return proto.CompactTextString(m) }
+func (*PublicCertificate) ProtoMessage()    {}
+func (*PublicCertificate) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{4}
+}
+func (m *PublicCertificate) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PublicCertificate.Unmarshal(m, b)
+}
+func (m *PublicCertificate) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PublicCertificate.Marshal(b, m, deterministic)
+}
+func (dst *PublicCertificate) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PublicCertificate.Merge(dst, src)
+}
+func (m *PublicCertificate) XXX_Size() int {
+	return xxx_messageInfo_PublicCertificate.Size(m)
+}
+func (m *PublicCertificate) XXX_DiscardUnknown() {
+	xxx_messageInfo_PublicCertificate.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PublicCertificate proto.InternalMessageInfo
+
+func (m *PublicCertificate) GetKeyName() string {
+	if m != nil && m.KeyName != nil {
+		return *m.KeyName
+	}
+	return ""
+}
+
+func (m *PublicCertificate) GetX509CertificatePem() string {
+	if m != nil && m.X509CertificatePem != nil {
+		return *m.X509CertificatePem
+	}
+	return ""
+}
+
+type GetPublicCertificateForAppResponse struct {
+	PublicCertificateList      []*PublicCertificate `protobuf:"bytes,1,rep,name=public_certificate_list,json=publicCertificateList" json:"public_certificate_list,omitempty"`
+	MaxClientCacheTimeInSecond *int64               `protobuf:"varint,2,opt,name=max_client_cache_time_in_second,json=maxClientCacheTimeInSecond" json:"max_client_cache_time_in_second,omitempty"`
+	XXX_NoUnkeyedLiteral       struct{}             `json:"-"`
+	XXX_unrecognized           []byte               `json:"-"`
+	XXX_sizecache              int32                `json:"-"`
+}
+
+func (m *GetPublicCertificateForAppResponse) Reset()         { *m = GetPublicCertificateForAppResponse{} }
+func (m *GetPublicCertificateForAppResponse) String() string { return proto.CompactTextString(m) }
+func (*GetPublicCertificateForAppResponse) ProtoMessage()    {}
+func (*GetPublicCertificateForAppResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{5}
+}
+func (m *GetPublicCertificateForAppResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetPublicCertificateForAppResponse.Unmarshal(m, b)
+}
+func (m *GetPublicCertificateForAppResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetPublicCertificateForAppResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetPublicCertificateForAppResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetPublicCertificateForAppResponse.Merge(dst, src)
+}
+func (m *GetPublicCertificateForAppResponse) XXX_Size() int {
+	return xxx_messageInfo_GetPublicCertificateForAppResponse.Size(m)
+}
+func (m *GetPublicCertificateForAppResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetPublicCertificateForAppResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetPublicCertificateForAppResponse proto.InternalMessageInfo
+
+func (m *GetPublicCertificateForAppResponse) GetPublicCertificateList() []*PublicCertificate {
+	if m != nil {
+		return m.PublicCertificateList
+	}
+	return nil
+}
+
+func (m *GetPublicCertificateForAppResponse) GetMaxClientCacheTimeInSecond() int64 {
+	if m != nil && m.MaxClientCacheTimeInSecond != nil {
+		return *m.MaxClientCacheTimeInSecond
+	}
+	return 0
+}
+
+type GetServiceAccountNameRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetServiceAccountNameRequest) Reset()         { *m = GetServiceAccountNameRequest{} }
+func (m *GetServiceAccountNameRequest) String() string { return proto.CompactTextString(m) }
+func (*GetServiceAccountNameRequest) ProtoMessage()    {}
+func (*GetServiceAccountNameRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{6}
+}
+func (m *GetServiceAccountNameRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetServiceAccountNameRequest.Unmarshal(m, b)
+}
+func (m *GetServiceAccountNameRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetServiceAccountNameRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetServiceAccountNameRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetServiceAccountNameRequest.Merge(dst, src)
+}
+func (m *GetServiceAccountNameRequest) XXX_Size() int {
+	return xxx_messageInfo_GetServiceAccountNameRequest.Size(m)
+}
+func (m *GetServiceAccountNameRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetServiceAccountNameRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetServiceAccountNameRequest proto.InternalMessageInfo
+
+type GetServiceAccountNameResponse struct {
+	ServiceAccountName   *string  `protobuf:"bytes,1,opt,name=service_account_name,json=serviceAccountName" json:"service_account_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetServiceAccountNameResponse) Reset()         { *m = GetServiceAccountNameResponse{} }
+func (m *GetServiceAccountNameResponse) String() string { return proto.CompactTextString(m) }
+func (*GetServiceAccountNameResponse) ProtoMessage()    {}
+func (*GetServiceAccountNameResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{7}
+}
+func (m *GetServiceAccountNameResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetServiceAccountNameResponse.Unmarshal(m, b)
+}
+func (m *GetServiceAccountNameResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetServiceAccountNameResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetServiceAccountNameResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetServiceAccountNameResponse.Merge(dst, src)
+}
+func (m *GetServiceAccountNameResponse) XXX_Size() int {
+	return xxx_messageInfo_GetServiceAccountNameResponse.Size(m)
+}
+func (m *GetServiceAccountNameResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetServiceAccountNameResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetServiceAccountNameResponse proto.InternalMessageInfo
+
+func (m *GetServiceAccountNameResponse) GetServiceAccountName() string {
+	if m != nil && m.ServiceAccountName != nil {
+		return *m.ServiceAccountName
+	}
+	return ""
+}
+
+type GetAccessTokenRequest struct {
+	Scope                []string `protobuf:"bytes,1,rep,name=scope" json:"scope,omitempty"`
+	ServiceAccountId     *int64   `protobuf:"varint,2,opt,name=service_account_id,json=serviceAccountId" json:"service_account_id,omitempty"`
+	ServiceAccountName   *string  `protobuf:"bytes,3,opt,name=service_account_name,json=serviceAccountName" json:"service_account_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetAccessTokenRequest) Reset()         { *m = GetAccessTokenRequest{} }
+func (m *GetAccessTokenRequest) String() string { return proto.CompactTextString(m) }
+func (*GetAccessTokenRequest) ProtoMessage()    {}
+func (*GetAccessTokenRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{8}
+}
+func (m *GetAccessTokenRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetAccessTokenRequest.Unmarshal(m, b)
+}
+func (m *GetAccessTokenRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetAccessTokenRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetAccessTokenRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetAccessTokenRequest.Merge(dst, src)
+}
+func (m *GetAccessTokenRequest) XXX_Size() int {
+	return xxx_messageInfo_GetAccessTokenRequest.Size(m)
+}
+func (m *GetAccessTokenRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetAccessTokenRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetAccessTokenRequest proto.InternalMessageInfo
+
+func (m *GetAccessTokenRequest) GetScope() []string {
+	if m != nil {
+		return m.Scope
+	}
+	return nil
+}
+
+func (m *GetAccessTokenRequest) GetServiceAccountId() int64 {
+	if m != nil && m.ServiceAccountId != nil {
+		return *m.ServiceAccountId
+	}
+	return 0
+}
+
+func (m *GetAccessTokenRequest) GetServiceAccountName() string {
+	if m != nil && m.ServiceAccountName != nil {
+		return *m.ServiceAccountName
+	}
+	return ""
+}
+
+type GetAccessTokenResponse struct {
+	AccessToken          *string  `protobuf:"bytes,1,opt,name=access_token,json=accessToken" json:"access_token,omitempty"`
+	ExpirationTime       *int64   `protobuf:"varint,2,opt,name=expiration_time,json=expirationTime" json:"expiration_time,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetAccessTokenResponse) Reset()         { *m = GetAccessTokenResponse{} }
+func (m *GetAccessTokenResponse) String() string { return proto.CompactTextString(m) }
+func (*GetAccessTokenResponse) ProtoMessage()    {}
+func (*GetAccessTokenResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{9}
+}
+func (m *GetAccessTokenResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetAccessTokenResponse.Unmarshal(m, b)
+}
+func (m *GetAccessTokenResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetAccessTokenResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetAccessTokenResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetAccessTokenResponse.Merge(dst, src)
+}
+func (m *GetAccessTokenResponse) XXX_Size() int {
+	return xxx_messageInfo_GetAccessTokenResponse.Size(m)
+}
+func (m *GetAccessTokenResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetAccessTokenResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetAccessTokenResponse proto.InternalMessageInfo
+
+func (m *GetAccessTokenResponse) GetAccessToken() string {
+	if m != nil && m.AccessToken != nil {
+		return *m.AccessToken
+	}
+	return ""
+}
+
+func (m *GetAccessTokenResponse) GetExpirationTime() int64 {
+	if m != nil && m.ExpirationTime != nil {
+		return *m.ExpirationTime
+	}
+	return 0
+}
+
+type GetDefaultGcsBucketNameRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetDefaultGcsBucketNameRequest) Reset()         { *m = GetDefaultGcsBucketNameRequest{} }
+func (m *GetDefaultGcsBucketNameRequest) String() string { return proto.CompactTextString(m) }
+func (*GetDefaultGcsBucketNameRequest) ProtoMessage()    {}
+func (*GetDefaultGcsBucketNameRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{10}
+}
+func (m *GetDefaultGcsBucketNameRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetDefaultGcsBucketNameRequest.Unmarshal(m, b)
+}
+func (m *GetDefaultGcsBucketNameRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetDefaultGcsBucketNameRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetDefaultGcsBucketNameRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetDefaultGcsBucketNameRequest.Merge(dst, src)
+}
+func (m *GetDefaultGcsBucketNameRequest) XXX_Size() int {
+	return xxx_messageInfo_GetDefaultGcsBucketNameRequest.Size(m)
+}
+func (m *GetDefaultGcsBucketNameRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetDefaultGcsBucketNameRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetDefaultGcsBucketNameRequest proto.InternalMessageInfo
+
+type GetDefaultGcsBucketNameResponse struct {
+	DefaultGcsBucketName *string  `protobuf:"bytes,1,opt,name=default_gcs_bucket_name,json=defaultGcsBucketName" json:"default_gcs_bucket_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetDefaultGcsBucketNameResponse) Reset()         { *m = GetDefaultGcsBucketNameResponse{} }
+func (m *GetDefaultGcsBucketNameResponse) String() string { return proto.CompactTextString(m) }
+func (*GetDefaultGcsBucketNameResponse) ProtoMessage()    {}
+func (*GetDefaultGcsBucketNameResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_app_identity_service_08a6e3f74b04cfa4, []int{11}
+}
+func (m *GetDefaultGcsBucketNameResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetDefaultGcsBucketNameResponse.Unmarshal(m, b)
+}
+func (m *GetDefaultGcsBucketNameResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetDefaultGcsBucketNameResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetDefaultGcsBucketNameResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetDefaultGcsBucketNameResponse.Merge(dst, src)
+}
+func (m *GetDefaultGcsBucketNameResponse) XXX_Size() int {
+	return xxx_messageInfo_GetDefaultGcsBucketNameResponse.Size(m)
+}
+func (m *GetDefaultGcsBucketNameResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetDefaultGcsBucketNameResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetDefaultGcsBucketNameResponse proto.InternalMessageInfo
+
+func (m *GetDefaultGcsBucketNameResponse) GetDefaultGcsBucketName() string {
+	if m != nil && m.DefaultGcsBucketName != nil {
+		return *m.DefaultGcsBucketName
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*AppIdentityServiceError)(nil), "appengine.AppIdentityServiceError")
+	proto.RegisterType((*SignForAppRequest)(nil), "appengine.SignForAppRequest")
+	proto.RegisterType((*SignForAppResponse)(nil), "appengine.SignForAppResponse")
+	proto.RegisterType((*GetPublicCertificateForAppRequest)(nil), "appengine.GetPublicCertificateForAppRequest")
+	proto.RegisterType((*PublicCertificate)(nil), "appengine.PublicCertificate")
+	proto.RegisterType((*GetPublicCertificateForAppResponse)(nil), "appengine.GetPublicCertificateForAppResponse")
+	proto.RegisterType((*GetServiceAccountNameRequest)(nil), "appengine.GetServiceAccountNameRequest")
+	proto.RegisterType((*GetServiceAccountNameResponse)(nil), "appengine.GetServiceAccountNameResponse")
+	proto.RegisterType((*GetAccessTokenRequest)(nil), "appengine.GetAccessTokenRequest")
+	proto.RegisterType((*GetAccessTokenResponse)(nil), "appengine.GetAccessTokenResponse")
+	proto.RegisterType((*GetDefaultGcsBucketNameRequest)(nil), "appengine.GetDefaultGcsBucketNameRequest")
+	proto.RegisterType((*GetDefaultGcsBucketNameResponse)(nil), "appengine.GetDefaultGcsBucketNameResponse")
+}
+
+func init() {
+	proto.RegisterFile("google.golang.org/appengine/internal/app_identity/app_identity_service.proto", fileDescriptor_app_identity_service_08a6e3f74b04cfa4)
+}
+
+var fileDescriptor_app_identity_service_08a6e3f74b04cfa4 = []byte{
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+	0xfa, 0xb0, 0x7d, 0x37, 0x4e, 0xbe, 0xdb, 0x11, 0xac, 0xfb, 0x19, 0x4c, 0x55, 0x8a, 0xe7, 0x3b,
+	0x95, 0xfd, 0x39, 0x35, 0xbd, 0x58, 0x1c, 0x47, 0x3c, 0xf6, 0x15, 0x97, 0x22, 0xab, 0x3f, 0x4f,
+	0x56, 0x99, 0xc3, 0x69, 0xe1, 0xfa, 0x21, 0xec, 0x37, 0x51, 0x59, 0x78, 0xe3, 0x8f, 0x86, 0xaa,
+	0xc9, 0x92, 0xc6, 0x88, 0x0d, 0x70, 0xa9, 0xea, 0x2b, 0x38, 0x58, 0xc9, 0xc8, 0x03, 0x9d, 0xc1,
+	0x4e, 0x7f, 0x3a, 0xa7, 0x01, 0x4b, 0xe8, 0x75, 0xc6, 0x58, 0xec, 0xbb, 0xd6, 0xff, 0x85, 0xbc,
+	0x51, 0x79, 0xb5, 0xbe, 0xf8, 0xc9, 0xfa, 0x19, 0x00, 0x00, 0xff, 0xff, 0x37, 0x4c, 0x56, 0x38,
+	0xf3, 0x04, 0x00, 0x00,
+}

vendor/google.golang.org/appengine/internal/app_identity/app_identity_service.proto

@@ -0,0 +1,64 @@
+syntax = "proto2";
+option go_package = "app_identity";
+
+package appengine;
+
+message AppIdentityServiceError {
+  enum ErrorCode {
+    SUCCESS = 0;
+    UNKNOWN_SCOPE = 9;
+    BLOB_TOO_LARGE = 1000;
+    DEADLINE_EXCEEDED = 1001;
+    NOT_A_VALID_APP = 1002;
+    UNKNOWN_ERROR = 1003;
+    NOT_ALLOWED = 1005;
+    NOT_IMPLEMENTED = 1006;
+  }
+}
+
+message SignForAppRequest {
+  optional bytes bytes_to_sign = 1;
+}
+
+message SignForAppResponse {
+  optional string key_name = 1;
+  optional bytes signature_bytes = 2;
+}
+
+message GetPublicCertificateForAppRequest {
+}
+
+message PublicCertificate {
+  optional string key_name = 1;
+  optional string x509_certificate_pem = 2;
+}
+
+message GetPublicCertificateForAppResponse {
+  repeated PublicCertificate public_certificate_list = 1;
+  optional int64 max_client_cache_time_in_second = 2;
+}
+
+message GetServiceAccountNameRequest {
+}
+
+message GetServiceAccountNameResponse {
+  optional string service_account_name = 1;
+}
+
+message GetAccessTokenRequest {
+  repeated string scope = 1;
+  optional int64 service_account_id = 2;
+  optional string service_account_name = 3;
+}
+
+message GetAccessTokenResponse {
+  optional string access_token = 1;
+  optional int64 expiration_time = 2;
+}
+
+message GetDefaultGcsBucketNameRequest {
+}
+
+message GetDefaultGcsBucketNameResponse {
+  optional string default_gcs_bucket_name = 1;
+}

vendor/google.golang.org/appengine/internal/base/api_base.pb.go

@@ -0,0 +1,308 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google.golang.org/appengine/internal/base/api_base.proto
+
+package base
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type StringProto struct {
+	Value                *string  `protobuf:"bytes,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StringProto) Reset()         { *m = StringProto{} }
+func (m *StringProto) String() string { return proto.CompactTextString(m) }
+func (*StringProto) ProtoMessage()    {}
+func (*StringProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{0}
+}
+func (m *StringProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StringProto.Unmarshal(m, b)
+}
+func (m *StringProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StringProto.Marshal(b, m, deterministic)
+}
+func (dst *StringProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StringProto.Merge(dst, src)
+}
+func (m *StringProto) XXX_Size() int {
+	return xxx_messageInfo_StringProto.Size(m)
+}
+func (m *StringProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_StringProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StringProto proto.InternalMessageInfo
+
+func (m *StringProto) GetValue() string {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return ""
+}
+
+type Integer32Proto struct {
+	Value                *int32   `protobuf:"varint,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Integer32Proto) Reset()         { *m = Integer32Proto{} }
+func (m *Integer32Proto) String() string { return proto.CompactTextString(m) }
+func (*Integer32Proto) ProtoMessage()    {}
+func (*Integer32Proto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{1}
+}
+func (m *Integer32Proto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Integer32Proto.Unmarshal(m, b)
+}
+func (m *Integer32Proto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Integer32Proto.Marshal(b, m, deterministic)
+}
+func (dst *Integer32Proto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Integer32Proto.Merge(dst, src)
+}
+func (m *Integer32Proto) XXX_Size() int {
+	return xxx_messageInfo_Integer32Proto.Size(m)
+}
+func (m *Integer32Proto) XXX_DiscardUnknown() {
+	xxx_messageInfo_Integer32Proto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Integer32Proto proto.InternalMessageInfo
+
+func (m *Integer32Proto) GetValue() int32 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type Integer64Proto struct {
+	Value                *int64   `protobuf:"varint,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Integer64Proto) Reset()         { *m = Integer64Proto{} }
+func (m *Integer64Proto) String() string { return proto.CompactTextString(m) }
+func (*Integer64Proto) ProtoMessage()    {}
+func (*Integer64Proto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{2}
+}
+func (m *Integer64Proto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Integer64Proto.Unmarshal(m, b)
+}
+func (m *Integer64Proto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Integer64Proto.Marshal(b, m, deterministic)
+}
+func (dst *Integer64Proto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Integer64Proto.Merge(dst, src)
+}
+func (m *Integer64Proto) XXX_Size() int {
+	return xxx_messageInfo_Integer64Proto.Size(m)
+}
+func (m *Integer64Proto) XXX_DiscardUnknown() {
+	xxx_messageInfo_Integer64Proto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Integer64Proto proto.InternalMessageInfo
+
+func (m *Integer64Proto) GetValue() int64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type BoolProto struct {
+	Value                *bool    `protobuf:"varint,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *BoolProto) Reset()         { *m = BoolProto{} }
+func (m *BoolProto) String() string { return proto.CompactTextString(m) }
+func (*BoolProto) ProtoMessage()    {}
+func (*BoolProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{3}
+}
+func (m *BoolProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BoolProto.Unmarshal(m, b)
+}
+func (m *BoolProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BoolProto.Marshal(b, m, deterministic)
+}
+func (dst *BoolProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BoolProto.Merge(dst, src)
+}
+func (m *BoolProto) XXX_Size() int {
+	return xxx_messageInfo_BoolProto.Size(m)
+}
+func (m *BoolProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_BoolProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BoolProto proto.InternalMessageInfo
+
+func (m *BoolProto) GetValue() bool {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return false
+}
+
+type DoubleProto struct {
+	Value                *float64 `protobuf:"fixed64,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DoubleProto) Reset()         { *m = DoubleProto{} }
+func (m *DoubleProto) String() string { return proto.CompactTextString(m) }
+func (*DoubleProto) ProtoMessage()    {}
+func (*DoubleProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{4}
+}
+func (m *DoubleProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DoubleProto.Unmarshal(m, b)
+}
+func (m *DoubleProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DoubleProto.Marshal(b, m, deterministic)
+}
+func (dst *DoubleProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DoubleProto.Merge(dst, src)
+}
+func (m *DoubleProto) XXX_Size() int {
+	return xxx_messageInfo_DoubleProto.Size(m)
+}
+func (m *DoubleProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_DoubleProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DoubleProto proto.InternalMessageInfo
+
+func (m *DoubleProto) GetValue() float64 {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return 0
+}
+
+type BytesProto struct {
+	Value                []byte   `protobuf:"bytes,1,req,name=value" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *BytesProto) Reset()         { *m = BytesProto{} }
+func (m *BytesProto) String() string { return proto.CompactTextString(m) }
+func (*BytesProto) ProtoMessage()    {}
+func (*BytesProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{5}
+}
+func (m *BytesProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_BytesProto.Unmarshal(m, b)
+}
+func (m *BytesProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_BytesProto.Marshal(b, m, deterministic)
+}
+func (dst *BytesProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_BytesProto.Merge(dst, src)
+}
+func (m *BytesProto) XXX_Size() int {
+	return xxx_messageInfo_BytesProto.Size(m)
+}
+func (m *BytesProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_BytesProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_BytesProto proto.InternalMessageInfo
+
+func (m *BytesProto) GetValue() []byte {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+type VoidProto struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *VoidProto) Reset()         { *m = VoidProto{} }
+func (m *VoidProto) String() string { return proto.CompactTextString(m) }
+func (*VoidProto) ProtoMessage()    {}
+func (*VoidProto) Descriptor() ([]byte, []int) {
+	return fileDescriptor_api_base_9d49f8792e0c1140, []int{6}
+}
+func (m *VoidProto) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_VoidProto.Unmarshal(m, b)
+}
+func (m *VoidProto) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_VoidProto.Marshal(b, m, deterministic)
+}
+func (dst *VoidProto) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_VoidProto.Merge(dst, src)
+}
+func (m *VoidProto) XXX_Size() int {
+	return xxx_messageInfo_VoidProto.Size(m)
+}
+func (m *VoidProto) XXX_DiscardUnknown() {
+	xxx_messageInfo_VoidProto.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_VoidProto proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*StringProto)(nil), "appengine.base.StringProto")
+	proto.RegisterType((*Integer32Proto)(nil), "appengine.base.Integer32Proto")
+	proto.RegisterType((*Integer64Proto)(nil), "appengine.base.Integer64Proto")
+	proto.RegisterType((*BoolProto)(nil), "appengine.base.BoolProto")
+	proto.RegisterType((*DoubleProto)(nil), "appengine.base.DoubleProto")
+	proto.RegisterType((*BytesProto)(nil), "appengine.base.BytesProto")
+	proto.RegisterType((*VoidProto)(nil), "appengine.base.VoidProto")
+}
+
+func init() {
+	proto.RegisterFile("google.golang.org/appengine/internal/base/api_base.proto", fileDescriptor_api_base_9d49f8792e0c1140)
+}
+
+var fileDescriptor_api_base_9d49f8792e0c1140 = []byte{
+	// 199 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0xcf, 0x3f, 0x4b, 0xc6, 0x30,
+	0x10, 0x06, 0x70, 0x5a, 0xad, 0xb4, 0x57, 0xe9, 0x20, 0x0e, 0x1d, 0xb5, 0x05, 0x71, 0x4a, 0x40,
+	0x45, 0x9c, 0x83, 0x8b, 0x9b, 0x28, 0x38, 0xb8, 0x48, 0x8a, 0xc7, 0x11, 0x08, 0xb9, 0x90, 0xa6,
+	0x82, 0xdf, 0x5e, 0xda, 0xd2, 0xfa, 0xc2, 0x9b, 0xed, 0xfe, 0xfc, 0xe0, 0xe1, 0x81, 0x27, 0x62,
+	0x26, 0x8b, 0x82, 0xd8, 0x6a, 0x47, 0x82, 0x03, 0x49, 0xed, 0x3d, 0x3a, 0x32, 0x0e, 0xa5, 0x71,
+	0x11, 0x83, 0xd3, 0x56, 0x0e, 0x7a, 0x44, 0xa9, 0xbd, 0xf9, 0x9a, 0x07, 0xe1, 0x03, 0x47, 0xbe,
+	0x68, 0x76, 0x27, 0xe6, 0x6b, 0xd7, 0x43, 0xfd, 0x1e, 0x83, 0x71, 0xf4, 0xba, 0xbc, 0x2f, 0xa1,
+	0xf8, 0xd1, 0x76, 0xc2, 0x36, 0xbb, 0xca, 0x6f, 0xab, 0xb7, 0x75, 0xe9, 0x6e, 0xa0, 0x79, 0x71,
+	0x11, 0x09, 0xc3, 0xfd, 0x5d, 0xc2, 0x15, 0xc7, 0xee, 0xf1, 0x21, 0xe1, 0x4e, 0x36, 0x77, 0x0d,
+	0x95, 0x62, 0xb6, 0x09, 0x52, 0x6e, 0xa4, 0x87, 0xfa, 0x99, 0xa7, 0xc1, 0x62, 0x02, 0x65, 0xff,
+	0x79, 0xa0, 0x7e, 0x23, 0x8e, 0xab, 0x69, 0x0f, 0xcd, 0xb9, 0xca, 0xcb, 0xdd, 0xd5, 0x50, 0x7d,
+	0xb0, 0xf9, 0x5e, 0x98, 0x3a, 0xfb, 0x3c, 0x9d, 0x9b, 0xff, 0x05, 0x00, 0x00, 0xff, 0xff, 0xba,
+	0x37, 0x25, 0xea, 0x44, 0x01, 0x00, 0x00,
+}

vendor/google.golang.org/appengine/internal/base/api_base.proto

@@ -0,0 +1,33 @@
+// Built-in base types for API calls. Primarily useful as return types.
+
+syntax = "proto2";
+option go_package = "base";
+
+package appengine.base;
+
+message StringProto {
+  required string value = 1;
+}
+
+message Integer32Proto {
+  required int32 value = 1;
+}
+
+message Integer64Proto {
+  required int64 value = 1;
+}
+
+message BoolProto {
+  required bool value = 1;
+}
+
+message DoubleProto {
+  required double value = 1;
+}
+
+message BytesProto {
+  required bytes value = 1 [ctype=CORD];
+}
+
+message VoidProto {
+}

vendor/google.golang.org/appengine/internal/datastore/datastore_v3.proto

@@ -0,0 +1,551 @@
+syntax = "proto2";
+option go_package = "datastore";
+
+package appengine;
+
+message Action{}
+
+message PropertyValue {
+  optional int64 int64Value = 1;
+  optional bool booleanValue = 2;
+  optional string stringValue = 3;
+  optional double doubleValue = 4;
+
+  optional group PointValue = 5 {
+    required double x = 6;
+    required double y = 7;
+  }
+
+  optional group UserValue = 8 {
+    required string email = 9;
+    required string auth_domain = 10;
+    optional string nickname = 11;
+    optional string federated_identity = 21;
+    optional string federated_provider = 22;
+  }
+
+  optional group ReferenceValue = 12 {
+    required string app = 13;
+    optional string name_space = 20;
+    repeated group PathElement = 14 {
+      required string type = 15;
+      optional int64 id = 16;
+      optional string name = 17;
+    }
+  }
+}
+
+message Property {
+  enum Meaning {
+    NO_MEANING = 0;
+    BLOB = 14;
+    TEXT = 15;
+    BYTESTRING = 16;
+
+    ATOM_CATEGORY = 1;
+    ATOM_LINK = 2;
+    ATOM_TITLE = 3;
+    ATOM_CONTENT = 4;
+    ATOM_SUMMARY = 5;
+    ATOM_AUTHOR = 6;
+
+    GD_WHEN = 7;
+    GD_EMAIL = 8;
+    GEORSS_POINT = 9;
+    GD_IM = 10;
+
+    GD_PHONENUMBER = 11;
+    GD_POSTALADDRESS = 12;
+
+    GD_RATING = 13;
+
+    BLOBKEY = 17;
+    ENTITY_PROTO = 19;
+
+    INDEX_VALUE = 18;
+  };
+
+  optional Meaning meaning = 1 [default = NO_MEANING];
+  optional string meaning_uri = 2;
+
+  required string name = 3;
+
+  required PropertyValue value = 5;
+
+  required bool multiple = 4;
+
+  optional bool searchable = 6 [default=false];
+
+  enum FtsTokenizationOption {
+    HTML = 1;
+    ATOM = 2;
+  }
+
+  optional FtsTokenizationOption fts_tokenization_option = 8;
+
+  optional string locale = 9 [default = "en"];
+}
+
+message Path {
+  repeated group Element = 1 {
+    required string type = 2;
+    optional int64 id = 3;
+    optional string name = 4;
+  }
+}
+
+message Reference {
+  required string app = 13;
+  optional string name_space = 20;
+  required Path path = 14;
+}
+
+message User {
+  required string email = 1;
+  required string auth_domain = 2;
+  optional string nickname = 3;
+  optional string federated_identity = 6;
+  optional string federated_provider = 7;
+}
+
+message EntityProto {
+  required Reference key = 13;
+  required Path entity_group = 16;
+  optional User owner = 17;
+
+  enum Kind {
+    GD_CONTACT = 1;
+    GD_EVENT = 2;
+    GD_MESSAGE = 3;
+  }
+  optional Kind kind = 4;
+  optional string kind_uri = 5;
+
+  repeated Property property = 14;
+  repeated Property raw_property = 15;
+
+  optional int32 rank = 18;
+}
+
+message CompositeProperty {
+  required int64 index_id = 1;
+  repeated string value = 2;
+}
+
+message Index {
+  required string entity_type = 1;
+  required bool ancestor = 5;
+  repeated group Property = 2 {
+    required string name = 3;
+    enum Direction {
+      ASCENDING = 1;
+      DESCENDING = 2;
+    }
+    optional Direction direction = 4 [default = ASCENDING];
+  }
+}
+
+message CompositeIndex {
+  required string app_id = 1;
+  required int64 id = 2;
+  required Index definition = 3;
+
+  enum State {
+    WRITE_ONLY = 1;
+    READ_WRITE = 2;
+    DELETED = 3;
+    ERROR = 4;
+  }
+  required State state = 4;
+
+  optional bool only_use_if_required = 6 [default = false];
+}
+
+message IndexPostfix {
+  message IndexValue {
+    required string property_name = 1;
+    required PropertyValue value = 2;
+  }
+
+  repeated IndexValue index_value = 1;
+
+  optional Reference key = 2;
+
+  optional bool before = 3 [default=true];
+}
+
+message IndexPosition {
+  optional string key = 1;
+
+  optional bool before = 2 [default=true];
+}
+
+message Snapshot {
+  enum Status {
+    INACTIVE = 0;
+    ACTIVE = 1;
+  }
+
+  required int64 ts = 1;
+}
+
+message InternalHeader {
+  optional string qos = 1;
+}
+
+message Transaction {
+  optional InternalHeader header = 4;
+  required fixed64 handle = 1;
+  required string app = 2;
+  optional bool mark_changes = 3 [default = false];
+}
+
+message Query {
+  optional InternalHeader header = 39;
+
+  required string app = 1;
+  optional string name_space = 29;
+
+  optional string kind = 3;
+  optional Reference ancestor = 17;
+
+  repeated group Filter = 4 {
+    enum Operator {
+      LESS_THAN = 1;
+      LESS_THAN_OR_EQUAL = 2;
+      GREATER_THAN = 3;
+      GREATER_THAN_OR_EQUAL = 4;
+      EQUAL = 5;
+      IN = 6;
+      EXISTS = 7;
+    }
+
+    required Operator op = 6;
+    repeated Property property = 14;
+  }
+
+  optional string search_query = 8;
+
+  repeated group Order = 9 {
+    enum Direction {
+      ASCENDING = 1;
+      DESCENDING = 2;
+    }
+
+    required string property = 10;
+    optional Direction direction = 11 [default = ASCENDING];
+  }
+
+  enum Hint {
+    ORDER_FIRST = 1;
+    ANCESTOR_FIRST = 2;
+    FILTER_FIRST = 3;
+  }
+  optional Hint hint = 18;
+
+  optional int32 count = 23;
+
+  optional int32 offset = 12 [default = 0];
+
+  optional int32 limit = 16;
+
+  optional CompiledCursor compiled_cursor = 30;
+  optional CompiledCursor end_compiled_cursor = 31;
+
+  repeated CompositeIndex composite_index = 19;
+
+  optional bool require_perfect_plan = 20 [default = false];
+
+  optional bool keys_only = 21 [default = false];
+
+  optional Transaction transaction = 22;
+
+  optional bool compile = 25 [default = false];
+
+  optional int64 failover_ms = 26;
+
+  optional bool strong = 32;
+
+  repeated string property_name = 33;
+
+  repeated string group_by_property_name = 34;
+
+  optional bool distinct = 24;
+
+  optional int64 min_safe_time_seconds = 35;
+
+  repeated string safe_replica_name = 36;
+
+  optional bool persist_offset = 37 [default=false];
+}
+
+message CompiledQuery {
+  required group PrimaryScan = 1 {
+    optional string index_name = 2;
+
+    optional string start_key = 3;
+    optional bool start_inclusive = 4;
+    optional string end_key = 5;
+    optional bool end_inclusive = 6;
+
+    repeated string start_postfix_value = 22;
+    repeated string end_postfix_value = 23;
+
+    optional int64 end_unapplied_log_timestamp_us = 19;
+  }
+
+  repeated group MergeJoinScan = 7 {
+    required string index_name = 8;
+
+    repeated string prefix_value = 9;
+
+    optional bool value_prefix = 20 [default=false];
+  }
+
+  optional Index index_def = 21;
+
+  optional int32 offset = 10 [default = 0];
+
+  optional int32 limit = 11;
+
+  required bool keys_only = 12;
+
+  repeated string property_name = 24;
+
+  optional int32 distinct_infix_size = 25;
+
+  optional group EntityFilter = 13 {
+    optional bool distinct = 14 [default=false];
+
+    optional string kind = 17;
+    optional Reference ancestor = 18;
+  }
+}
+
+message CompiledCursor {
+  optional group Position = 2 {
+    optional string start_key = 27;
+
+    repeated group IndexValue = 29 {
+      optional string property = 30;
+      required PropertyValue value = 31;
+    }
+
+    optional Reference key = 32;
+
+    optional bool start_inclusive = 28 [default=true];
+  }
+}
+
+message Cursor {
+  required fixed64 cursor = 1;
+
+  optional string app = 2;
+}
+
+message Error {
+  enum ErrorCode {
+    BAD_REQUEST = 1;
+    CONCURRENT_TRANSACTION = 2;
+    INTERNAL_ERROR = 3;
+    NEED_INDEX = 4;
+    TIMEOUT = 5;
+    PERMISSION_DENIED = 6;
+    BIGTABLE_ERROR = 7;
+    COMMITTED_BUT_STILL_APPLYING = 8;
+    CAPABILITY_DISABLED = 9;
+    TRY_ALTERNATE_BACKEND = 10;
+    SAFE_TIME_TOO_OLD = 11;
+  }
+}
+
+message Cost {
+  optional int32 index_writes = 1;
+  optional int32 index_write_bytes = 2;
+  optional int32 entity_writes = 3;
+  optional int32 entity_write_bytes = 4;
+  optional group CommitCost = 5 {
+    optional int32 requested_entity_puts = 6;
+    optional int32 requested_entity_deletes = 7;
+  };
+  optional int32 approximate_storage_delta = 8;
+  optional int32 id_sequence_updates = 9;
+}
+
+message GetRequest {
+  optional InternalHeader header = 6;
+
+  repeated Reference key = 1;
+  optional Transaction transaction = 2;
+
+  optional int64 failover_ms = 3;
+
+  optional bool strong = 4;
+
+  optional bool allow_deferred = 5 [default=false];
+}
+
+message GetResponse {
+  repeated group Entity = 1 {
+    optional EntityProto entity = 2;
+    optional Reference key = 4;
+
+    optional int64 version = 3;
+  }
+
+  repeated Reference deferred = 5;
+
+  optional bool in_order = 6 [default=true];
+}
+
+message PutRequest {
+  optional InternalHeader header = 11;
+
+  repeated EntityProto entity = 1;
+  optional Transaction transaction = 2;
+  repeated CompositeIndex composite_index = 3;
+
+  optional bool trusted = 4 [default = false];
+
+  optional bool force = 7 [default = false];
+
+  optional bool mark_changes = 8 [default = false];
+  repeated Snapshot snapshot = 9;
+
+  enum AutoIdPolicy {
+    CURRENT = 0;
+    SEQUENTIAL = 1;
+  }
+  optional AutoIdPolicy auto_id_policy = 10 [default = CURRENT];
+}
+
+message PutResponse {
+  repeated Reference key = 1;
+  optional Cost cost = 2;
+  repeated int64 version = 3;
+}
+
+message TouchRequest {
+  optional InternalHeader header = 10;
+
+  repeated Reference key = 1;
+  repeated CompositeIndex composite_index = 2;
+  optional bool force = 3 [default = false];
+  repeated Snapshot snapshot = 9;
+}
+
+message TouchResponse {
+  optional Cost cost = 1;
+}
+
+message DeleteRequest {
+  optional InternalHeader header = 10;
+
+  repeated Reference key = 6;
+  optional Transaction transaction = 5;
+
+  optional bool trusted = 4 [default = false];
+
+  optional bool force = 7 [default = false];
+
+  optional bool mark_changes = 8 [default = false];
+  repeated Snapshot snapshot = 9;
+}
+
+message DeleteResponse {
+  optional Cost cost = 1;
+  repeated int64 version = 3;
+}
+
+message NextRequest {
+  optional InternalHeader header = 5;
+
+  required Cursor cursor = 1;
+  optional int32 count = 2;
+
+  optional int32 offset = 4 [default = 0];
+
+  optional bool compile = 3 [default = false];
+}
+
+message QueryResult {
+  optional Cursor cursor = 1;
+
+  repeated EntityProto result = 2;
+
+  optional int32 skipped_results = 7;
+
+  required bool more_results = 3;
+
+  optional bool keys_only = 4;
+
+  optional bool index_only = 9;
+
+  optional bool small_ops = 10;
+
+  optional CompiledQuery compiled_query = 5;
+
+  optional CompiledCursor compiled_cursor = 6;
+
+  repeated CompositeIndex index = 8;
+
+  repeated int64 version = 11;
+}
+
+message AllocateIdsRequest {
+  optional InternalHeader header = 4;
+
+  optional Reference model_key = 1;
+
+  optional int64 size = 2;
+
+  optional int64 max = 3;
+
+  repeated Reference reserve = 5;
+}
+
+message AllocateIdsResponse {
+  required int64 start = 1;
+  required int64 end = 2;
+  optional Cost cost = 3;
+}
+
+message CompositeIndices {
+  repeated CompositeIndex index = 1;
+}
+
+message AddActionsRequest {
+  optional InternalHeader header = 3;
+
+  required Transaction transaction = 1;
+  repeated Action action = 2;
+}
+
+message AddActionsResponse {
+}
+
+message BeginTransactionRequest {
+  optional InternalHeader header = 3;
+
+  required string app = 1;
+  optional bool allow_multiple_eg = 2 [default = false];
+  optional string database_id = 4;
+
+  enum TransactionMode {
+    UNKNOWN = 0;
+    READ_ONLY = 1;
+    READ_WRITE = 2;
+  }
+  optional TransactionMode mode = 5 [default = UNKNOWN];
+
+  optional Transaction previous_transaction = 7;
+}
+
+message CommitResponse {
+  optional Cost cost = 1;
+
+  repeated group Version = 3 {
+    required Reference root_entity_key = 4;
+    required int64 version = 5;
+  }
+}

vendor/google.golang.org/appengine/internal/identity.go

@@ -0,0 +1,55 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+	"os"
+
+	netcontext "golang.org/x/net/context"
+)
+
+var (
+	// This is set to true in identity_classic.go, which is behind the appengine build tag.
+	// The appengine build tag is set for the first generation runtimes (<= Go 1.9) but not
+	// the second generation runtimes (>= Go 1.11), so this indicates whether we're on a
+	// first-gen runtime. See IsStandard below for the second-gen check.
+	appengineStandard bool
+
+	// This is set to true in identity_flex.go, which is behind the appenginevm build tag.
+	appengineFlex bool
+)
+
+// AppID is the implementation of the wrapper function of the same name in
+// ../identity.go. See that file for commentary.
+func AppID(c netcontext.Context) string {
+	return appID(FullyQualifiedAppID(c))
+}
+
+// IsStandard is the implementation of the wrapper function of the same name in
+// ../appengine.go. See that file for commentary.
+func IsStandard() bool {
+	// appengineStandard will be true for first-gen runtimes (<= Go 1.9) but not
+	// second-gen (>= Go 1.11).
+	return appengineStandard || IsSecondGen()
+}
+
+// IsStandard is the implementation of the wrapper function of the same name in
+// ../appengine.go. See that file for commentary.
+func IsSecondGen() bool {
+	// Second-gen runtimes set $GAE_ENV so we use that to check if we're on a second-gen runtime.
+	return os.Getenv("GAE_ENV") == "standard"
+}
+
+// IsFlex is the implementation of the wrapper function of the same name in
+// ../appengine.go. See that file for commentary.
+func IsFlex() bool {
+	return appengineFlex
+}
+
+// IsAppEngine is the implementation of the wrapper function of the same name in
+// ../appengine.go. See that file for commentary.
+func IsAppEngine() bool {
+	return IsStandard() || IsFlex()
+}

vendor/google.golang.org/appengine/internal/identity_classic.go

@@ -0,0 +1,62 @@
+// Copyright 2015 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build appengine
+// +build appengine
+
+package internal
+
+import (
+	"appengine"
+
+	netcontext "golang.org/x/net/context"
+)
+
+func init() {
+	appengineStandard = true
+}
+
+func DefaultVersionHostname(ctx netcontext.Context) string {
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	return appengine.DefaultVersionHostname(c)
+}
+
+func Datacenter(_ netcontext.Context) string { return appengine.Datacenter() }
+func ServerSoftware() string                 { return appengine.ServerSoftware() }
+func InstanceID() string                     { return appengine.InstanceID() }
+func IsDevAppServer() bool                   { return appengine.IsDevAppServer() }
+
+func RequestID(ctx netcontext.Context) string {
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	return appengine.RequestID(c)
+}
+
+func ModuleName(ctx netcontext.Context) string {
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	return appengine.ModuleName(c)
+}
+func VersionID(ctx netcontext.Context) string {
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	return appengine.VersionID(c)
+}
+
+func fullyQualifiedAppID(ctx netcontext.Context) string {
+	c := fromContext(ctx)
+	if c == nil {
+		panic(errNotAppEngineContext)
+	}
+	return c.FullyQualifiedAppID()
+}

vendor/google.golang.org/appengine/internal/identity_flex.go

@@ -0,0 +1,12 @@
+// Copyright 2018 Google LLC. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build appenginevm
+// +build appenginevm
+
+package internal
+
+func init() {
+	appengineFlex = true
+}

vendor/google.golang.org/appengine/internal/identity_vm.go

@@ -0,0 +1,135 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build !appengine
+// +build !appengine
+
+package internal
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"strings"
+
+	netcontext "golang.org/x/net/context"
+)
+
+// These functions are implementations of the wrapper functions
+// in ../appengine/identity.go. See that file for commentary.
+
+const (
+	hDefaultVersionHostname = "X-AppEngine-Default-Version-Hostname"
+	hRequestLogId           = "X-AppEngine-Request-Log-Id"
+	hDatacenter             = "X-AppEngine-Datacenter"
+)
+
+func ctxHeaders(ctx netcontext.Context) http.Header {
+	c := fromContext(ctx)
+	if c == nil {
+		return nil
+	}
+	return c.Request().Header
+}
+
+func DefaultVersionHostname(ctx netcontext.Context) string {
+	return ctxHeaders(ctx).Get(hDefaultVersionHostname)
+}
+
+func RequestID(ctx netcontext.Context) string {
+	return ctxHeaders(ctx).Get(hRequestLogId)
+}
+
+func Datacenter(ctx netcontext.Context) string {
+	if dc := ctxHeaders(ctx).Get(hDatacenter); dc != "" {
+		return dc
+	}
+	// If the header isn't set, read zone from the metadata service.
+	// It has the format projects/[NUMERIC_PROJECT_ID]/zones/[ZONE]
+	zone, err := getMetadata("instance/zone")
+	if err != nil {
+		log.Printf("Datacenter: %v", err)
+		return ""
+	}
+	parts := strings.Split(string(zone), "/")
+	if len(parts) == 0 {
+		return ""
+	}
+	return parts[len(parts)-1]
+}
+
+func ServerSoftware() string {
+	// TODO(dsymonds): Remove fallback when we've verified this.
+	if s := os.Getenv("SERVER_SOFTWARE"); s != "" {
+		return s
+	}
+	if s := os.Getenv("GAE_ENV"); s != "" {
+		return s
+	}
+	return "Google App Engine/1.x.x"
+}
+
+// TODO(dsymonds): Remove the metadata fetches.
+
+func ModuleName(_ netcontext.Context) string {
+	if s := os.Getenv("GAE_MODULE_NAME"); s != "" {
+		return s
+	}
+	if s := os.Getenv("GAE_SERVICE"); s != "" {
+		return s
+	}
+	return string(mustGetMetadata("instance/attributes/gae_backend_name"))
+}
+
+func VersionID(_ netcontext.Context) string {
+	if s1, s2 := os.Getenv("GAE_MODULE_VERSION"), os.Getenv("GAE_MINOR_VERSION"); s1 != "" && s2 != "" {
+		return s1 + "." + s2
+	}
+	if s1, s2 := os.Getenv("GAE_VERSION"), os.Getenv("GAE_DEPLOYMENT_ID"); s1 != "" && s2 != "" {
+		return s1 + "." + s2
+	}
+	return string(mustGetMetadata("instance/attributes/gae_backend_version")) + "." + string(mustGetMetadata("instance/attributes/gae_backend_minor_version"))
+}
+
+func InstanceID() string {
+	if s := os.Getenv("GAE_MODULE_INSTANCE"); s != "" {
+		return s
+	}
+	if s := os.Getenv("GAE_INSTANCE"); s != "" {
+		return s
+	}
+	return string(mustGetMetadata("instance/attributes/gae_backend_instance"))
+}
+
+func partitionlessAppID() string {
+	// gae_project has everything except the partition prefix.
+	if appID := os.Getenv("GAE_LONG_APP_ID"); appID != "" {
+		return appID
+	}
+	if project := os.Getenv("GOOGLE_CLOUD_PROJECT"); project != "" {
+		return project
+	}
+	return string(mustGetMetadata("instance/attributes/gae_project"))
+}
+
+func fullyQualifiedAppID(_ netcontext.Context) string {
+	if s := os.Getenv("GAE_APPLICATION"); s != "" {
+		return s
+	}
+	appID := partitionlessAppID()
+
+	part := os.Getenv("GAE_PARTITION")
+	if part == "" {
+		part = string(mustGetMetadata("instance/attributes/gae_partition"))
+	}
+
+	if part != "" {
+		appID = part + "~" + appID
+	}
+	return appID
+}
+
+func IsDevAppServer() bool {
+	return os.Getenv("RUN_WITH_DEVAPPSERVER") != ""
+}

vendor/google.golang.org/appengine/internal/internal.go

@@ -0,0 +1,110 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// Package internal provides support for package appengine.
+//
+// Programs should not use this package directly. Its API is not stable.
+// Use packages appengine and appengine/* instead.
+package internal
+
+import (
+	"fmt"
+
+	"github.com/golang/protobuf/proto"
+
+	remotepb "google.golang.org/appengine/internal/remote_api"
+)
+
+// errorCodeMaps is a map of service name to the error code map for the service.
+var errorCodeMaps = make(map[string]map[int32]string)
+
+// RegisterErrorCodeMap is called from API implementations to register their
+// error code map. This should only be called from init functions.
+func RegisterErrorCodeMap(service string, m map[int32]string) {
+	errorCodeMaps[service] = m
+}
+
+type timeoutCodeKey struct {
+	service string
+	code    int32
+}
+
+// timeoutCodes is the set of service+code pairs that represent timeouts.
+var timeoutCodes = make(map[timeoutCodeKey]bool)
+
+func RegisterTimeoutErrorCode(service string, code int32) {
+	timeoutCodes[timeoutCodeKey{service, code}] = true
+}
+
+// APIError is the type returned by appengine.Context's Call method
+// when an API call fails in an API-specific way. This may be, for instance,
+// a taskqueue API call failing with TaskQueueServiceError::UNKNOWN_QUEUE.
+type APIError struct {
+	Service string
+	Detail  string
+	Code    int32 // API-specific error code
+}
+
+func (e *APIError) Error() string {
+	if e.Code == 0 {
+		if e.Detail == "" {
+			return "APIError <empty>"
+		}
+		return e.Detail
+	}
+	s := fmt.Sprintf("API error %d", e.Code)
+	if m, ok := errorCodeMaps[e.Service]; ok {
+		s += " (" + e.Service + ": " + m[e.Code] + ")"
+	} else {
+		// Shouldn't happen, but provide a bit more detail if it does.
+		s = e.Service + " " + s
+	}
+	if e.Detail != "" {
+		s += ": " + e.Detail
+	}
+	return s
+}
+
+func (e *APIError) IsTimeout() bool {
+	return timeoutCodes[timeoutCodeKey{e.Service, e.Code}]
+}
+
+// CallError is the type returned by appengine.Context's Call method when an
+// API call fails in a generic way, such as RpcError::CAPABILITY_DISABLED.
+type CallError struct {
+	Detail string
+	Code   int32
+	// TODO: Remove this if we get a distinguishable error code.
+	Timeout bool
+}
+
+func (e *CallError) Error() string {
+	var msg string
+	switch remotepb.RpcError_ErrorCode(e.Code) {
+	case remotepb.RpcError_UNKNOWN:
+		return e.Detail
+	case remotepb.RpcError_OVER_QUOTA:
+		msg = "Over quota"
+	case remotepb.RpcError_CAPABILITY_DISABLED:
+		msg = "Capability disabled"
+	case remotepb.RpcError_CANCELLED:
+		msg = "Canceled"
+	default:
+		msg = fmt.Sprintf("Call error %d", e.Code)
+	}
+	s := msg + ": " + e.Detail
+	if e.Timeout {
+		s += " (timeout)"
+	}
+	return s
+}
+
+func (e *CallError) IsTimeout() bool {
+	return e.Timeout
+}
+
+// NamespaceMods is a map from API service to a function that will mutate an RPC request to attach a namespace.
+// The function should be prepared to be called on the same message more than once; it should only modify the
+// RPC request the first time.
+var NamespaceMods = make(map[string]func(m proto.Message, namespace string))

vendor/google.golang.org/appengine/internal/log/log_service.proto

@@ -0,0 +1,150 @@
+syntax = "proto2";
+option go_package = "log";
+
+package appengine;
+
+message LogServiceError {
+  enum ErrorCode {
+    OK  = 0;
+    INVALID_REQUEST = 1;
+    STORAGE_ERROR = 2;
+  }
+}
+
+message UserAppLogLine {
+  required int64 timestamp_usec = 1;
+  required int64 level = 2;
+  required string message = 3;
+}
+
+message UserAppLogGroup {
+  repeated UserAppLogLine log_line = 2;
+}
+
+message FlushRequest {
+  optional bytes logs = 1;
+}
+
+message SetStatusRequest {
+  required string status = 1;
+}
+
+
+message LogOffset {
+  optional bytes request_id = 1;
+}
+
+message LogLine {
+  required int64 time = 1;
+  required int32 level = 2;
+  required string log_message = 3;
+}
+
+message RequestLog {
+  required string app_id = 1;
+  optional string module_id = 37 [default="default"];
+  required string version_id = 2;
+  required bytes request_id = 3;
+  optional LogOffset offset = 35;
+  required string ip = 4;
+  optional string nickname = 5;
+  required int64 start_time = 6;
+  required int64 end_time = 7;
+  required int64 latency = 8;
+  required int64 mcycles = 9;
+  required string method = 10;
+  required string resource = 11;
+  required string http_version = 12;
+  required int32 status = 13;
+  required int64 response_size = 14;
+  optional string referrer = 15;
+  optional string user_agent = 16;
+  required string url_map_entry = 17;
+  required string combined = 18;
+  optional int64 api_mcycles = 19;
+  optional string host = 20;
+  optional double cost = 21;
+
+  optional string task_queue_name = 22;
+  optional string task_name = 23;
+
+  optional bool was_loading_request = 24;
+  optional int64 pending_time = 25;
+  optional int32 replica_index = 26 [default = -1];
+  optional bool finished = 27 [default = true];
+  optional bytes clone_key = 28;
+
+  repeated LogLine line = 29;
+
+  optional bool lines_incomplete = 36;
+  optional bytes app_engine_release = 38;
+
+  optional int32 exit_reason = 30;
+  optional bool was_throttled_for_time = 31;
+  optional bool was_throttled_for_requests = 32;
+  optional int64 throttled_time = 33;
+
+  optional bytes server_name = 34;
+}
+
+message LogModuleVersion {
+  optional string module_id = 1 [default="default"];
+  optional string version_id = 2;
+}
+
+message LogReadRequest {
+  required string app_id = 1;
+  repeated string version_id = 2;
+  repeated LogModuleVersion module_version = 19;
+
+  optional int64 start_time = 3;
+  optional int64 end_time = 4;
+  optional LogOffset offset = 5;
+  repeated bytes request_id = 6;
+
+  optional int32 minimum_log_level = 7;
+  optional bool include_incomplete = 8;
+  optional int64 count = 9;
+
+  optional string combined_log_regex = 14;
+  optional string host_regex = 15;
+  optional int32 replica_index = 16;
+
+  optional bool include_app_logs = 10;
+  optional int32 app_logs_per_request = 17;
+  optional bool include_host = 11;
+  optional bool include_all = 12;
+  optional bool cache_iterator = 13;
+  optional int32 num_shards = 18;
+}
+
+message LogReadResponse {
+  repeated RequestLog log = 1;
+  optional LogOffset offset = 2;
+  optional int64 last_end_time = 3;
+}
+
+message LogUsageRecord {
+  optional string version_id = 1;
+  optional int32 start_time = 2;
+  optional int32 end_time = 3;
+  optional int64 count = 4;
+  optional int64 total_size = 5;
+  optional int32 records = 6;
+}
+
+message LogUsageRequest {
+  required string app_id = 1;
+  repeated string version_id = 2;
+  optional int32 start_time = 3;
+  optional int32 end_time = 4;
+  optional uint32 resolution_hours = 5 [default = 1];
+  optional bool combine_versions = 6;
+  optional int32 usage_version = 7;
+  optional bool versions_only = 8;
+}
+
+message LogUsageResponse {
+  repeated LogUsageRecord usage = 1;
+  optional LogUsageRecord summary = 2;
+}

vendor/google.golang.org/appengine/internal/main.go

@@ -0,0 +1,17 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build appengine
+// +build appengine
+
+package internal
+
+import (
+	"appengine_internal"
+)
+
+func Main() {
+	MainPath = ""
+	appengine_internal.Main()
+}

vendor/google.golang.org/appengine/internal/main_common.go

@@ -0,0 +1,7 @@
+package internal
+
+// MainPath stores the file path of the main package. On App Engine Standard
+// using Go version 1.9 and below, this will be unset. On App Engine Flex and
+// App Engine Standard second-gen (Go 1.11 and above), this will be the
+// filepath to package main.
+var MainPath string

vendor/google.golang.org/appengine/internal/main_vm.go

@@ -0,0 +1,70 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+//go:build !appengine
+// +build !appengine
+
+package internal
+
+import (
+	"io"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+func Main() {
+	MainPath = filepath.Dir(findMainPath())
+	installHealthChecker(http.DefaultServeMux)
+
+	port := "8080"
+	if s := os.Getenv("PORT"); s != "" {
+		port = s
+	}
+
+	host := ""
+	if IsDevAppServer() {
+		host = "127.0.0.1"
+	}
+	if err := http.ListenAndServe(host+":"+port, http.HandlerFunc(handleHTTP)); err != nil {
+		log.Fatalf("http.ListenAndServe: %v", err)
+	}
+}
+
+// Find the path to package main by looking at the root Caller.
+func findMainPath() string {
+	pc := make([]uintptr, 100)
+	n := runtime.Callers(2, pc)
+	frames := runtime.CallersFrames(pc[:n])
+	for {
+		frame, more := frames.Next()
+		// Tests won't have package main, instead they have testing.tRunner
+		if frame.Function == "main.main" || frame.Function == "testing.tRunner" {
+			return frame.File
+		}
+		if !more {
+			break
+		}
+	}
+	return ""
+}
+
+func installHealthChecker(mux *http.ServeMux) {
+	// If no health check handler has been installed by this point, add a trivial one.
+	const healthPath = "/_ah/health"
+	hreq := &http.Request{
+		Method: "GET",
+		URL: &url.URL{
+			Path: healthPath,
+		},
+	}
+	if _, pat := mux.Handler(hreq); pat != healthPath {
+		mux.HandleFunc(healthPath, func(w http.ResponseWriter, r *http.Request) {
+			io.WriteString(w, "ok")
+		})
+	}
+}

vendor/google.golang.org/appengine/internal/metadata.go

@@ -0,0 +1,60 @@
+// Copyright 2014 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+// This file has code for accessing metadata.
+//
+// References:
+//	https://cloud.google.com/compute/docs/metadata
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+)
+
+const (
+	metadataHost = "metadata"
+	metadataPath = "/computeMetadata/v1/"
+)
+
+var (
+	metadataRequestHeaders = http.Header{
+		"Metadata-Flavor": []string{"Google"},
+	}
+)
+
+// TODO(dsymonds): Do we need to support default values, like Python?
+func mustGetMetadata(key string) []byte {
+	b, err := getMetadata(key)
+	if err != nil {
+		panic(fmt.Sprintf("Metadata fetch failed for '%s': %v", key, err))
+	}
+	return b
+}
+
+func getMetadata(key string) ([]byte, error) {
+	// TODO(dsymonds): May need to use url.Parse to support keys with query args.
+	req := &http.Request{
+		Method: "GET",
+		URL: &url.URL{
+			Scheme: "http",
+			Host:   metadataHost,
+			Path:   metadataPath + key,
+		},
+		Header: metadataRequestHeaders,
+		Host:   metadataHost,
+	}
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != 200 {
+		return nil, fmt.Errorf("metadata server returned HTTP %d", resp.StatusCode)
+	}
+	return ioutil.ReadAll(resp.Body)
+}

vendor/google.golang.org/appengine/internal/modules/modules_service.pb.go

@@ -0,0 +1,786 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google.golang.org/appengine/internal/modules/modules_service.proto
+
+package modules
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type ModulesServiceError_ErrorCode int32
+
+const (
+	ModulesServiceError_OK                ModulesServiceError_ErrorCode = 0
+	ModulesServiceError_INVALID_MODULE    ModulesServiceError_ErrorCode = 1
+	ModulesServiceError_INVALID_VERSION   ModulesServiceError_ErrorCode = 2
+	ModulesServiceError_INVALID_INSTANCES ModulesServiceError_ErrorCode = 3
+	ModulesServiceError_TRANSIENT_ERROR   ModulesServiceError_ErrorCode = 4
+	ModulesServiceError_UNEXPECTED_STATE  ModulesServiceError_ErrorCode = 5
+)
+
+var ModulesServiceError_ErrorCode_name = map[int32]string{
+	0: "OK",
+	1: "INVALID_MODULE",
+	2: "INVALID_VERSION",
+	3: "INVALID_INSTANCES",
+	4: "TRANSIENT_ERROR",
+	5: "UNEXPECTED_STATE",
+}
+var ModulesServiceError_ErrorCode_value = map[string]int32{
+	"OK":                0,
+	"INVALID_MODULE":    1,
+	"INVALID_VERSION":   2,
+	"INVALID_INSTANCES": 3,
+	"TRANSIENT_ERROR":   4,
+	"UNEXPECTED_STATE":  5,
+}
+
+func (x ModulesServiceError_ErrorCode) Enum() *ModulesServiceError_ErrorCode {
+	p := new(ModulesServiceError_ErrorCode)
+	*p = x
+	return p
+}
+func (x ModulesServiceError_ErrorCode) String() string {
+	return proto.EnumName(ModulesServiceError_ErrorCode_name, int32(x))
+}
+func (x *ModulesServiceError_ErrorCode) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(ModulesServiceError_ErrorCode_value, data, "ModulesServiceError_ErrorCode")
+	if err != nil {
+		return err
+	}
+	*x = ModulesServiceError_ErrorCode(value)
+	return nil
+}
+func (ModulesServiceError_ErrorCode) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{0, 0}
+}
+
+type ModulesServiceError struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ModulesServiceError) Reset()         { *m = ModulesServiceError{} }
+func (m *ModulesServiceError) String() string { return proto.CompactTextString(m) }
+func (*ModulesServiceError) ProtoMessage()    {}
+func (*ModulesServiceError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{0}
+}
+func (m *ModulesServiceError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ModulesServiceError.Unmarshal(m, b)
+}
+func (m *ModulesServiceError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ModulesServiceError.Marshal(b, m, deterministic)
+}
+func (dst *ModulesServiceError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ModulesServiceError.Merge(dst, src)
+}
+func (m *ModulesServiceError) XXX_Size() int {
+	return xxx_messageInfo_ModulesServiceError.Size(m)
+}
+func (m *ModulesServiceError) XXX_DiscardUnknown() {
+	xxx_messageInfo_ModulesServiceError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ModulesServiceError proto.InternalMessageInfo
+
+type GetModulesRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetModulesRequest) Reset()         { *m = GetModulesRequest{} }
+func (m *GetModulesRequest) String() string { return proto.CompactTextString(m) }
+func (*GetModulesRequest) ProtoMessage()    {}
+func (*GetModulesRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{1}
+}
+func (m *GetModulesRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetModulesRequest.Unmarshal(m, b)
+}
+func (m *GetModulesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetModulesRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetModulesRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetModulesRequest.Merge(dst, src)
+}
+func (m *GetModulesRequest) XXX_Size() int {
+	return xxx_messageInfo_GetModulesRequest.Size(m)
+}
+func (m *GetModulesRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetModulesRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetModulesRequest proto.InternalMessageInfo
+
+type GetModulesResponse struct {
+	Module               []string `protobuf:"bytes,1,rep,name=module" json:"module,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetModulesResponse) Reset()         { *m = GetModulesResponse{} }
+func (m *GetModulesResponse) String() string { return proto.CompactTextString(m) }
+func (*GetModulesResponse) ProtoMessage()    {}
+func (*GetModulesResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{2}
+}
+func (m *GetModulesResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetModulesResponse.Unmarshal(m, b)
+}
+func (m *GetModulesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetModulesResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetModulesResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetModulesResponse.Merge(dst, src)
+}
+func (m *GetModulesResponse) XXX_Size() int {
+	return xxx_messageInfo_GetModulesResponse.Size(m)
+}
+func (m *GetModulesResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetModulesResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetModulesResponse proto.InternalMessageInfo
+
+func (m *GetModulesResponse) GetModule() []string {
+	if m != nil {
+		return m.Module
+	}
+	return nil
+}
+
+type GetVersionsRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetVersionsRequest) Reset()         { *m = GetVersionsRequest{} }
+func (m *GetVersionsRequest) String() string { return proto.CompactTextString(m) }
+func (*GetVersionsRequest) ProtoMessage()    {}
+func (*GetVersionsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{3}
+}
+func (m *GetVersionsRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetVersionsRequest.Unmarshal(m, b)
+}
+func (m *GetVersionsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetVersionsRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetVersionsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetVersionsRequest.Merge(dst, src)
+}
+func (m *GetVersionsRequest) XXX_Size() int {
+	return xxx_messageInfo_GetVersionsRequest.Size(m)
+}
+func (m *GetVersionsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetVersionsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetVersionsRequest proto.InternalMessageInfo
+
+func (m *GetVersionsRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+type GetVersionsResponse struct {
+	Version              []string `protobuf:"bytes,1,rep,name=version" json:"version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetVersionsResponse) Reset()         { *m = GetVersionsResponse{} }
+func (m *GetVersionsResponse) String() string { return proto.CompactTextString(m) }
+func (*GetVersionsResponse) ProtoMessage()    {}
+func (*GetVersionsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{4}
+}
+func (m *GetVersionsResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetVersionsResponse.Unmarshal(m, b)
+}
+func (m *GetVersionsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetVersionsResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetVersionsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetVersionsResponse.Merge(dst, src)
+}
+func (m *GetVersionsResponse) XXX_Size() int {
+	return xxx_messageInfo_GetVersionsResponse.Size(m)
+}
+func (m *GetVersionsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetVersionsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetVersionsResponse proto.InternalMessageInfo
+
+func (m *GetVersionsResponse) GetVersion() []string {
+	if m != nil {
+		return m.Version
+	}
+	return nil
+}
+
+type GetDefaultVersionRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetDefaultVersionRequest) Reset()         { *m = GetDefaultVersionRequest{} }
+func (m *GetDefaultVersionRequest) String() string { return proto.CompactTextString(m) }
+func (*GetDefaultVersionRequest) ProtoMessage()    {}
+func (*GetDefaultVersionRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{5}
+}
+func (m *GetDefaultVersionRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetDefaultVersionRequest.Unmarshal(m, b)
+}
+func (m *GetDefaultVersionRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetDefaultVersionRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetDefaultVersionRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetDefaultVersionRequest.Merge(dst, src)
+}
+func (m *GetDefaultVersionRequest) XXX_Size() int {
+	return xxx_messageInfo_GetDefaultVersionRequest.Size(m)
+}
+func (m *GetDefaultVersionRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetDefaultVersionRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetDefaultVersionRequest proto.InternalMessageInfo
+
+func (m *GetDefaultVersionRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+type GetDefaultVersionResponse struct {
+	Version              *string  `protobuf:"bytes,1,req,name=version" json:"version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetDefaultVersionResponse) Reset()         { *m = GetDefaultVersionResponse{} }
+func (m *GetDefaultVersionResponse) String() string { return proto.CompactTextString(m) }
+func (*GetDefaultVersionResponse) ProtoMessage()    {}
+func (*GetDefaultVersionResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{6}
+}
+func (m *GetDefaultVersionResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetDefaultVersionResponse.Unmarshal(m, b)
+}
+func (m *GetDefaultVersionResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetDefaultVersionResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetDefaultVersionResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetDefaultVersionResponse.Merge(dst, src)
+}
+func (m *GetDefaultVersionResponse) XXX_Size() int {
+	return xxx_messageInfo_GetDefaultVersionResponse.Size(m)
+}
+func (m *GetDefaultVersionResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetDefaultVersionResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetDefaultVersionResponse proto.InternalMessageInfo
+
+func (m *GetDefaultVersionResponse) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+type GetNumInstancesRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	Version              *string  `protobuf:"bytes,2,opt,name=version" json:"version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetNumInstancesRequest) Reset()         { *m = GetNumInstancesRequest{} }
+func (m *GetNumInstancesRequest) String() string { return proto.CompactTextString(m) }
+func (*GetNumInstancesRequest) ProtoMessage()    {}
+func (*GetNumInstancesRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{7}
+}
+func (m *GetNumInstancesRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetNumInstancesRequest.Unmarshal(m, b)
+}
+func (m *GetNumInstancesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetNumInstancesRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetNumInstancesRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetNumInstancesRequest.Merge(dst, src)
+}
+func (m *GetNumInstancesRequest) XXX_Size() int {
+	return xxx_messageInfo_GetNumInstancesRequest.Size(m)
+}
+func (m *GetNumInstancesRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetNumInstancesRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetNumInstancesRequest proto.InternalMessageInfo
+
+func (m *GetNumInstancesRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+func (m *GetNumInstancesRequest) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+type GetNumInstancesResponse struct {
+	Instances            *int64   `protobuf:"varint,1,req,name=instances" json:"instances,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetNumInstancesResponse) Reset()         { *m = GetNumInstancesResponse{} }
+func (m *GetNumInstancesResponse) String() string { return proto.CompactTextString(m) }
+func (*GetNumInstancesResponse) ProtoMessage()    {}
+func (*GetNumInstancesResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{8}
+}
+func (m *GetNumInstancesResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetNumInstancesResponse.Unmarshal(m, b)
+}
+func (m *GetNumInstancesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetNumInstancesResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetNumInstancesResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetNumInstancesResponse.Merge(dst, src)
+}
+func (m *GetNumInstancesResponse) XXX_Size() int {
+	return xxx_messageInfo_GetNumInstancesResponse.Size(m)
+}
+func (m *GetNumInstancesResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetNumInstancesResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetNumInstancesResponse proto.InternalMessageInfo
+
+func (m *GetNumInstancesResponse) GetInstances() int64 {
+	if m != nil && m.Instances != nil {
+		return *m.Instances
+	}
+	return 0
+}
+
+type SetNumInstancesRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	Version              *string  `protobuf:"bytes,2,opt,name=version" json:"version,omitempty"`
+	Instances            *int64   `protobuf:"varint,3,req,name=instances" json:"instances,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SetNumInstancesRequest) Reset()         { *m = SetNumInstancesRequest{} }
+func (m *SetNumInstancesRequest) String() string { return proto.CompactTextString(m) }
+func (*SetNumInstancesRequest) ProtoMessage()    {}
+func (*SetNumInstancesRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{9}
+}
+func (m *SetNumInstancesRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SetNumInstancesRequest.Unmarshal(m, b)
+}
+func (m *SetNumInstancesRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SetNumInstancesRequest.Marshal(b, m, deterministic)
+}
+func (dst *SetNumInstancesRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SetNumInstancesRequest.Merge(dst, src)
+}
+func (m *SetNumInstancesRequest) XXX_Size() int {
+	return xxx_messageInfo_SetNumInstancesRequest.Size(m)
+}
+func (m *SetNumInstancesRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SetNumInstancesRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SetNumInstancesRequest proto.InternalMessageInfo
+
+func (m *SetNumInstancesRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+func (m *SetNumInstancesRequest) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+func (m *SetNumInstancesRequest) GetInstances() int64 {
+	if m != nil && m.Instances != nil {
+		return *m.Instances
+	}
+	return 0
+}
+
+type SetNumInstancesResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *SetNumInstancesResponse) Reset()         { *m = SetNumInstancesResponse{} }
+func (m *SetNumInstancesResponse) String() string { return proto.CompactTextString(m) }
+func (*SetNumInstancesResponse) ProtoMessage()    {}
+func (*SetNumInstancesResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{10}
+}
+func (m *SetNumInstancesResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_SetNumInstancesResponse.Unmarshal(m, b)
+}
+func (m *SetNumInstancesResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_SetNumInstancesResponse.Marshal(b, m, deterministic)
+}
+func (dst *SetNumInstancesResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SetNumInstancesResponse.Merge(dst, src)
+}
+func (m *SetNumInstancesResponse) XXX_Size() int {
+	return xxx_messageInfo_SetNumInstancesResponse.Size(m)
+}
+func (m *SetNumInstancesResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SetNumInstancesResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SetNumInstancesResponse proto.InternalMessageInfo
+
+type StartModuleRequest struct {
+	Module               *string  `protobuf:"bytes,1,req,name=module" json:"module,omitempty"`
+	Version              *string  `protobuf:"bytes,2,req,name=version" json:"version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StartModuleRequest) Reset()         { *m = StartModuleRequest{} }
+func (m *StartModuleRequest) String() string { return proto.CompactTextString(m) }
+func (*StartModuleRequest) ProtoMessage()    {}
+func (*StartModuleRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{11}
+}
+func (m *StartModuleRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StartModuleRequest.Unmarshal(m, b)
+}
+func (m *StartModuleRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StartModuleRequest.Marshal(b, m, deterministic)
+}
+func (dst *StartModuleRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StartModuleRequest.Merge(dst, src)
+}
+func (m *StartModuleRequest) XXX_Size() int {
+	return xxx_messageInfo_StartModuleRequest.Size(m)
+}
+func (m *StartModuleRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_StartModuleRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StartModuleRequest proto.InternalMessageInfo
+
+func (m *StartModuleRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+func (m *StartModuleRequest) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+type StartModuleResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StartModuleResponse) Reset()         { *m = StartModuleResponse{} }
+func (m *StartModuleResponse) String() string { return proto.CompactTextString(m) }
+func (*StartModuleResponse) ProtoMessage()    {}
+func (*StartModuleResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{12}
+}
+func (m *StartModuleResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StartModuleResponse.Unmarshal(m, b)
+}
+func (m *StartModuleResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StartModuleResponse.Marshal(b, m, deterministic)
+}
+func (dst *StartModuleResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StartModuleResponse.Merge(dst, src)
+}
+func (m *StartModuleResponse) XXX_Size() int {
+	return xxx_messageInfo_StartModuleResponse.Size(m)
+}
+func (m *StartModuleResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_StartModuleResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StartModuleResponse proto.InternalMessageInfo
+
+type StopModuleRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	Version              *string  `protobuf:"bytes,2,opt,name=version" json:"version,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StopModuleRequest) Reset()         { *m = StopModuleRequest{} }
+func (m *StopModuleRequest) String() string { return proto.CompactTextString(m) }
+func (*StopModuleRequest) ProtoMessage()    {}
+func (*StopModuleRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{13}
+}
+func (m *StopModuleRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StopModuleRequest.Unmarshal(m, b)
+}
+func (m *StopModuleRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StopModuleRequest.Marshal(b, m, deterministic)
+}
+func (dst *StopModuleRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StopModuleRequest.Merge(dst, src)
+}
+func (m *StopModuleRequest) XXX_Size() int {
+	return xxx_messageInfo_StopModuleRequest.Size(m)
+}
+func (m *StopModuleRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_StopModuleRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StopModuleRequest proto.InternalMessageInfo
+
+func (m *StopModuleRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+func (m *StopModuleRequest) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+type StopModuleResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *StopModuleResponse) Reset()         { *m = StopModuleResponse{} }
+func (m *StopModuleResponse) String() string { return proto.CompactTextString(m) }
+func (*StopModuleResponse) ProtoMessage()    {}
+func (*StopModuleResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{14}
+}
+func (m *StopModuleResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_StopModuleResponse.Unmarshal(m, b)
+}
+func (m *StopModuleResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_StopModuleResponse.Marshal(b, m, deterministic)
+}
+func (dst *StopModuleResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_StopModuleResponse.Merge(dst, src)
+}
+func (m *StopModuleResponse) XXX_Size() int {
+	return xxx_messageInfo_StopModuleResponse.Size(m)
+}
+func (m *StopModuleResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_StopModuleResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_StopModuleResponse proto.InternalMessageInfo
+
+type GetHostnameRequest struct {
+	Module               *string  `protobuf:"bytes,1,opt,name=module" json:"module,omitempty"`
+	Version              *string  `protobuf:"bytes,2,opt,name=version" json:"version,omitempty"`
+	Instance             *string  `protobuf:"bytes,3,opt,name=instance" json:"instance,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetHostnameRequest) Reset()         { *m = GetHostnameRequest{} }
+func (m *GetHostnameRequest) String() string { return proto.CompactTextString(m) }
+func (*GetHostnameRequest) ProtoMessage()    {}
+func (*GetHostnameRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{15}
+}
+func (m *GetHostnameRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetHostnameRequest.Unmarshal(m, b)
+}
+func (m *GetHostnameRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetHostnameRequest.Marshal(b, m, deterministic)
+}
+func (dst *GetHostnameRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetHostnameRequest.Merge(dst, src)
+}
+func (m *GetHostnameRequest) XXX_Size() int {
+	return xxx_messageInfo_GetHostnameRequest.Size(m)
+}
+func (m *GetHostnameRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetHostnameRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetHostnameRequest proto.InternalMessageInfo
+
+func (m *GetHostnameRequest) GetModule() string {
+	if m != nil && m.Module != nil {
+		return *m.Module
+	}
+	return ""
+}
+
+func (m *GetHostnameRequest) GetVersion() string {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return ""
+}
+
+func (m *GetHostnameRequest) GetInstance() string {
+	if m != nil && m.Instance != nil {
+		return *m.Instance
+	}
+	return ""
+}
+
+type GetHostnameResponse struct {
+	Hostname             *string  `protobuf:"bytes,1,req,name=hostname" json:"hostname,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *GetHostnameResponse) Reset()         { *m = GetHostnameResponse{} }
+func (m *GetHostnameResponse) String() string { return proto.CompactTextString(m) }
+func (*GetHostnameResponse) ProtoMessage()    {}
+func (*GetHostnameResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_modules_service_9cd3bffe4e91c59a, []int{16}
+}
+func (m *GetHostnameResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_GetHostnameResponse.Unmarshal(m, b)
+}
+func (m *GetHostnameResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_GetHostnameResponse.Marshal(b, m, deterministic)
+}
+func (dst *GetHostnameResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_GetHostnameResponse.Merge(dst, src)
+}
+func (m *GetHostnameResponse) XXX_Size() int {
+	return xxx_messageInfo_GetHostnameResponse.Size(m)
+}
+func (m *GetHostnameResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_GetHostnameResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_GetHostnameResponse proto.InternalMessageInfo
+
+func (m *GetHostnameResponse) GetHostname() string {
+	if m != nil && m.Hostname != nil {
+		return *m.Hostname
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*ModulesServiceError)(nil), "appengine.ModulesServiceError")
+	proto.RegisterType((*GetModulesRequest)(nil), "appengine.GetModulesRequest")
+	proto.RegisterType((*GetModulesResponse)(nil), "appengine.GetModulesResponse")
+	proto.RegisterType((*GetVersionsRequest)(nil), "appengine.GetVersionsRequest")
+	proto.RegisterType((*GetVersionsResponse)(nil), "appengine.GetVersionsResponse")
+	proto.RegisterType((*GetDefaultVersionRequest)(nil), "appengine.GetDefaultVersionRequest")
+	proto.RegisterType((*GetDefaultVersionResponse)(nil), "appengine.GetDefaultVersionResponse")
+	proto.RegisterType((*GetNumInstancesRequest)(nil), "appengine.GetNumInstancesRequest")
+	proto.RegisterType((*GetNumInstancesResponse)(nil), "appengine.GetNumInstancesResponse")
+	proto.RegisterType((*SetNumInstancesRequest)(nil), "appengine.SetNumInstancesRequest")
+	proto.RegisterType((*SetNumInstancesResponse)(nil), "appengine.SetNumInstancesResponse")
+	proto.RegisterType((*StartModuleRequest)(nil), "appengine.StartModuleRequest")
+	proto.RegisterType((*StartModuleResponse)(nil), "appengine.StartModuleResponse")
+	proto.RegisterType((*StopModuleRequest)(nil), "appengine.StopModuleRequest")
+	proto.RegisterType((*StopModuleResponse)(nil), "appengine.StopModuleResponse")
+	proto.RegisterType((*GetHostnameRequest)(nil), "appengine.GetHostnameRequest")
+	proto.RegisterType((*GetHostnameResponse)(nil), "appengine.GetHostnameResponse")
+}
+
+func init() {
+	proto.RegisterFile("google.golang.org/appengine/internal/modules/modules_service.proto", fileDescriptor_modules_service_9cd3bffe4e91c59a)
+}
+
+var fileDescriptor_modules_service_9cd3bffe4e91c59a = []byte{
+	// 457 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xac, 0x94, 0xc1, 0x6f, 0xd3, 0x30,
+	0x14, 0xc6, 0x69, 0x02, 0xdb, 0xf2, 0x0e, 0x90, 0x3a, 0x5b, 0xd7, 0x4d, 0x1c, 0x50, 0x4e, 0x1c,
+	0x50, 0x2b, 0x90, 0x10, 0xe7, 0xae, 0x35, 0x25, 0xb0, 0xa5, 0x28, 0xce, 0x2a, 0xc4, 0xa5, 0x0a,
+	0xdb, 0x23, 0x8b, 0x94, 0xda, 0xc1, 0x76, 0x77, 0xe4, 0xbf, 0xe0, 0xff, 0x45, 0x4b, 0xed, 0xb6,
+	0x81, 0x4e, 0x45, 0x68, 0xa7, 0xe4, 0x7d, 0xfe, 0xfc, 0x7b, 0x9f, 0x5f, 0xac, 0xc0, 0x59, 0x2e,
+	0x44, 0x5e, 0x62, 0x2f, 0x17, 0x65, 0xc6, 0xf3, 0x9e, 0x90, 0x79, 0x3f, 0xab, 0x2a, 0xe4, 0x79,
+	0xc1, 0xb1, 0x5f, 0x70, 0x8d, 0x92, 0x67, 0x65, 0x7f, 0x2e, 0xae, 0x17, 0x25, 0x2a, 0xfb, 0x9c,
+	0x29, 0x94, 0xb7, 0xc5, 0x15, 0xf6, 0x2a, 0x29, 0xb4, 0x20, 0xde, 0x6a, 0x47, 0xf8, 0xab, 0x05,
+	0xc1, 0xc5, 0xd2, 0xc4, 0x96, 0x1e, 0x2a, 0xa5, 0x90, 0xe1, 0x4f, 0xf0, 0xea, 0x97, 0xa1, 0xb8,
+	0x46, 0xb2, 0x07, 0xce, 0xe4, 0x93, 0xff, 0x88, 0x10, 0x78, 0x1a, 0xc5, 0xd3, 0xc1, 0x79, 0x34,
+	0x9a, 0x5d, 0x4c, 0x46, 0x97, 0xe7, 0xd4, 0x6f, 0x91, 0x00, 0x9e, 0x59, 0x6d, 0x4a, 0x13, 0x16,
+	0x4d, 0x62, 0xdf, 0x21, 0x47, 0xd0, 0xb6, 0x62, 0x14, 0xb3, 0x74, 0x10, 0x0f, 0x29, 0xf3, 0xdd,
+	0x3b, 0x6f, 0x9a, 0x0c, 0x62, 0x16, 0xd1, 0x38, 0x9d, 0xd1, 0x24, 0x99, 0x24, 0xfe, 0x63, 0x72,
+	0x08, 0xfe, 0x65, 0x4c, 0xbf, 0x7c, 0xa6, 0xc3, 0x94, 0x8e, 0x66, 0x2c, 0x1d, 0xa4, 0xd4, 0x7f,
+	0x12, 0x06, 0xd0, 0x1e, 0xa3, 0x36, 0xc9, 0x12, 0xfc, 0xb1, 0x40, 0xa5, 0xc3, 0x57, 0x40, 0x36,
+	0x45, 0x55, 0x09, 0xae, 0x90, 0x74, 0x60, 0x6f, 0x79, 0xcc, 0x6e, 0xeb, 0x85, 0xfb, 0xd2, 0x4b,
+	0x4c, 0x65, 0xdc, 0x53, 0x94, 0xaa, 0x10, 0xdc, 0x32, 0x1a, 0xee, 0xd6, 0x86, 0xbb, 0x0f, 0x41,
+	0xc3, 0x6d, 0xe0, 0x5d, 0xd8, 0xbf, 0x5d, 0x6a, 0x86, 0x6e, 0xcb, 0xf0, 0x0d, 0x74, 0xc7, 0xa8,
+	0x47, 0xf8, 0x3d, 0x5b, 0x94, 0x76, 0xdf, 0xae, 0x26, 0x6f, 0xe1, 0x64, 0xcb, 0x9e, 0x6d, 0xad,
+	0x9c, 0xcd, 0x56, 0x1f, 0xa1, 0x33, 0x46, 0x1d, 0x2f, 0xe6, 0x11, 0x57, 0x3a, 0xe3, 0x57, 0xb8,
+	0xeb, 0x34, 0x9b, 0x2c, 0xa7, 0x5e, 0x58, 0xb1, 0xde, 0xc1, 0xf1, 0x5f, 0x2c, 0x13, 0xe0, 0x39,
+	0x78, 0x85, 0x15, 0xeb, 0x08, 0x6e, 0xb2, 0x16, 0xc2, 0x1b, 0xe8, 0xb0, 0x07, 0x0a, 0xd1, 0xec,
+	0xe4, 0xfe, 0xd9, 0xe9, 0x04, 0x8e, 0xd9, 0xf6, 0x88, 0xe1, 0x7b, 0x20, 0x4c, 0x67, 0xd2, 0xdc,
+	0x81, 0x6d, 0x01, 0x9c, 0xfb, 0x02, 0x34, 0x26, 0x7a, 0x04, 0x41, 0x83, 0x63, 0xf0, 0x14, 0xda,
+	0x4c, 0x8b, 0xea, 0x7e, 0xfa, 0xbf, 0xcd, 0xf8, 0xf0, 0x2e, 0xe5, 0x1a, 0x63, 0xe0, 0xdf, 0xea,
+	0xfb, 0xf8, 0x41, 0x28, 0xcd, 0xb3, 0xf9, 0xff, 0xd3, 0xc9, 0x29, 0x1c, 0xd8, 0x59, 0x75, 0xdd,
+	0x7a, 0x69, 0x55, 0x87, 0xaf, 0xeb, 0x5b, 0xbc, 0xee, 0x61, 0xbe, 0xec, 0x29, 0x1c, 0xdc, 0x18,
+	0xcd, 0x8c, 0x68, 0x55, 0x9f, 0x79, 0x5f, 0xf7, 0xcd, 0x5f, 0xe2, 0x77, 0x00, 0x00, 0x00, 0xff,
+	0xff, 0x6e, 0xbc, 0xe0, 0x61, 0x5c, 0x04, 0x00, 0x00,
+}

vendor/google.golang.org/appengine/internal/modules/modules_service.proto

@@ -0,0 +1,80 @@
+syntax = "proto2";
+option go_package = "modules";
+
+package appengine;
+
+message ModulesServiceError {
+  enum ErrorCode {
+    OK  = 0;
+    INVALID_MODULE = 1;
+    INVALID_VERSION = 2;
+    INVALID_INSTANCES = 3;
+    TRANSIENT_ERROR = 4;
+    UNEXPECTED_STATE = 5;
+  }
+}
+
+message GetModulesRequest {
+}
+
+message GetModulesResponse {
+  repeated string module = 1;
+}
+
+message GetVersionsRequest {
+  optional string module = 1;
+}
+
+message GetVersionsResponse {
+  repeated string version = 1;
+}
+
+message GetDefaultVersionRequest {
+  optional string module = 1;
+}
+
+message GetDefaultVersionResponse {
+  required string version = 1;
+}
+
+message GetNumInstancesRequest {
+  optional string module = 1;
+  optional string version = 2;
+}
+
+message GetNumInstancesResponse {
+  required int64 instances = 1;
+}
+
+message SetNumInstancesRequest {
+  optional string module = 1;
+  optional string version = 2;
+  required int64 instances = 3;
+}
+
+message SetNumInstancesResponse {}
+
+message StartModuleRequest {
+  required string module = 1;
+  required string version = 2;
+}
+
+message StartModuleResponse {}
+
+message StopModuleRequest {
+  optional string module = 1;
+  optional string version = 2;
+}
+
+message StopModuleResponse {}
+
+message GetHostnameRequest {
+  optional string module = 1;
+  optional string version = 2;
+  optional string instance = 3;
+}
+
+message GetHostnameResponse {
+  required string hostname = 1;
+}
+

vendor/google.golang.org/appengine/internal/net.go

@@ -0,0 +1,56 @@
+// Copyright 2014 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+// This file implements a network dialer that limits the number of concurrent connections.
+// It is only used for API calls.
+
+import (
+	"log"
+	"net"
+	"runtime"
+	"sync"
+	"time"
+)
+
+var limitSem = make(chan int, 100) // TODO(dsymonds): Use environment variable.
+
+func limitRelease() {
+	// non-blocking
+	select {
+	case <-limitSem:
+	default:
+		// This should not normally happen.
+		log.Print("appengine: unbalanced limitSem release!")
+	}
+}
+
+func limitDial(network, addr string) (net.Conn, error) {
+	limitSem <- 1
+
+	// Dial with a timeout in case the API host is MIA.
+	// The connection should normally be very fast.
+	conn, err := net.DialTimeout(network, addr, 10*time.Second)
+	if err != nil {
+		limitRelease()
+		return nil, err
+	}
+	lc := &limitConn{Conn: conn}
+	runtime.SetFinalizer(lc, (*limitConn).Close) // shouldn't usually be required
+	return lc, nil
+}
+
+type limitConn struct {
+	close sync.Once
+	net.Conn
+}
+
+func (lc *limitConn) Close() error {
+	defer lc.close.Do(func() {
+		limitRelease()
+		runtime.SetFinalizer(lc, nil)
+	})
+	return lc.Conn.Close()
+}

vendor/google.golang.org/appengine/internal/regen.sh

@@ -0,0 +1,40 @@
+#!/bin/bash -e
+#
+# This script rebuilds the generated code for the protocol buffers.
+# To run this you will need protoc and goprotobuf installed;
+# see https://github.com/golang/protobuf for instructions.
+
+PKG=google.golang.org/appengine
+
+function die() {
+	echo 1>&2 $*
+	exit 1
+}
+
+# Sanity check that the right tools are accessible.
+for tool in go protoc protoc-gen-go; do
+	q=$(which $tool) || die "didn't find $tool"
+	echo 1>&2 "$tool: $q"
+done
+
+echo -n 1>&2 "finding package dir... "
+pkgdir=$(go list -f '{{.Dir}}' $PKG)
+echo 1>&2 $pkgdir
+base=$(echo $pkgdir | sed "s,/$PKG\$,,")
+echo 1>&2 "base: $base"
+cd $base
+
+# Run protoc once per package.
+for dir in $(find $PKG/internal -name '*.proto' | xargs dirname | sort | uniq); do
+	echo 1>&2 "* $dir"
+	protoc --go_out=. $dir/*.proto
+done
+
+for f in $(find $PKG/internal -name '*.pb.go'); do
+  # Remove proto.RegisterEnum calls.
+  # These cause duplicate registration panics when these packages
+  # are used on classic App Engine. proto.RegisterEnum only affects
+  # parsing the text format; we don't care about that.
+  # https://code.google.com/p/googleappengine/issues/detail?id=11670#c17
+  sed -i '/proto.RegisterEnum/d' $f
+done

vendor/google.golang.org/appengine/internal/remote_api/remote_api.pb.go

@@ -0,0 +1,361 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google.golang.org/appengine/internal/remote_api/remote_api.proto
+
+package remote_api
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type RpcError_ErrorCode int32
+
+const (
+	RpcError_UNKNOWN             RpcError_ErrorCode = 0
+	RpcError_CALL_NOT_FOUND      RpcError_ErrorCode = 1
+	RpcError_PARSE_ERROR         RpcError_ErrorCode = 2
+	RpcError_SECURITY_VIOLATION  RpcError_ErrorCode = 3
+	RpcError_OVER_QUOTA          RpcError_ErrorCode = 4
+	RpcError_REQUEST_TOO_LARGE   RpcError_ErrorCode = 5
+	RpcError_CAPABILITY_DISABLED RpcError_ErrorCode = 6
+	RpcError_FEATURE_DISABLED    RpcError_ErrorCode = 7
+	RpcError_BAD_REQUEST         RpcError_ErrorCode = 8
+	RpcError_RESPONSE_TOO_LARGE  RpcError_ErrorCode = 9
+	RpcError_CANCELLED           RpcError_ErrorCode = 10
+	RpcError_REPLAY_ERROR        RpcError_ErrorCode = 11
+	RpcError_DEADLINE_EXCEEDED   RpcError_ErrorCode = 12
+)
+
+var RpcError_ErrorCode_name = map[int32]string{
+	0:  "UNKNOWN",
+	1:  "CALL_NOT_FOUND",
+	2:  "PARSE_ERROR",
+	3:  "SECURITY_VIOLATION",
+	4:  "OVER_QUOTA",
+	5:  "REQUEST_TOO_LARGE",
+	6:  "CAPABILITY_DISABLED",
+	7:  "FEATURE_DISABLED",
+	8:  "BAD_REQUEST",
+	9:  "RESPONSE_TOO_LARGE",
+	10: "CANCELLED",
+	11: "REPLAY_ERROR",
+	12: "DEADLINE_EXCEEDED",
+}
+var RpcError_ErrorCode_value = map[string]int32{
+	"UNKNOWN":             0,
+	"CALL_NOT_FOUND":      1,
+	"PARSE_ERROR":         2,
+	"SECURITY_VIOLATION":  3,
+	"OVER_QUOTA":          4,
+	"REQUEST_TOO_LARGE":   5,
+	"CAPABILITY_DISABLED": 6,
+	"FEATURE_DISABLED":    7,
+	"BAD_REQUEST":         8,
+	"RESPONSE_TOO_LARGE":  9,
+	"CANCELLED":           10,
+	"REPLAY_ERROR":        11,
+	"DEADLINE_EXCEEDED":   12,
+}
+
+func (x RpcError_ErrorCode) Enum() *RpcError_ErrorCode {
+	p := new(RpcError_ErrorCode)
+	*p = x
+	return p
+}
+func (x RpcError_ErrorCode) String() string {
+	return proto.EnumName(RpcError_ErrorCode_name, int32(x))
+}
+func (x *RpcError_ErrorCode) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(RpcError_ErrorCode_value, data, "RpcError_ErrorCode")
+	if err != nil {
+		return err
+	}
+	*x = RpcError_ErrorCode(value)
+	return nil
+}
+func (RpcError_ErrorCode) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_remote_api_1978114ec33a273d, []int{2, 0}
+}
+
+type Request struct {
+	ServiceName          *string  `protobuf:"bytes,2,req,name=service_name,json=serviceName" json:"service_name,omitempty"`
+	Method               *string  `protobuf:"bytes,3,req,name=method" json:"method,omitempty"`
+	Request              []byte   `protobuf:"bytes,4,req,name=request" json:"request,omitempty"`
+	RequestId            *string  `protobuf:"bytes,5,opt,name=request_id,json=requestId" json:"request_id,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Request) Reset()         { *m = Request{} }
+func (m *Request) String() string { return proto.CompactTextString(m) }
+func (*Request) ProtoMessage()    {}
+func (*Request) Descriptor() ([]byte, []int) {
+	return fileDescriptor_remote_api_1978114ec33a273d, []int{0}
+}
+func (m *Request) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Request.Unmarshal(m, b)
+}
+func (m *Request) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Request.Marshal(b, m, deterministic)
+}
+func (dst *Request) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Request.Merge(dst, src)
+}
+func (m *Request) XXX_Size() int {
+	return xxx_messageInfo_Request.Size(m)
+}
+func (m *Request) XXX_DiscardUnknown() {
+	xxx_messageInfo_Request.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Request proto.InternalMessageInfo
+
+func (m *Request) GetServiceName() string {
+	if m != nil && m.ServiceName != nil {
+		return *m.ServiceName
+	}
+	return ""
+}
+
+func (m *Request) GetMethod() string {
+	if m != nil && m.Method != nil {
+		return *m.Method
+	}
+	return ""
+}
+
+func (m *Request) GetRequest() []byte {
+	if m != nil {
+		return m.Request
+	}
+	return nil
+}
+
+func (m *Request) GetRequestId() string {
+	if m != nil && m.RequestId != nil {
+		return *m.RequestId
+	}
+	return ""
+}
+
+type ApplicationError struct {
+	Code                 *int32   `protobuf:"varint,1,req,name=code" json:"code,omitempty"`
+	Detail               *string  `protobuf:"bytes,2,req,name=detail" json:"detail,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ApplicationError) Reset()         { *m = ApplicationError{} }
+func (m *ApplicationError) String() string { return proto.CompactTextString(m) }
+func (*ApplicationError) ProtoMessage()    {}
+func (*ApplicationError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_remote_api_1978114ec33a273d, []int{1}
+}
+func (m *ApplicationError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ApplicationError.Unmarshal(m, b)
+}
+func (m *ApplicationError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ApplicationError.Marshal(b, m, deterministic)
+}
+func (dst *ApplicationError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ApplicationError.Merge(dst, src)
+}
+func (m *ApplicationError) XXX_Size() int {
+	return xxx_messageInfo_ApplicationError.Size(m)
+}
+func (m *ApplicationError) XXX_DiscardUnknown() {
+	xxx_messageInfo_ApplicationError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ApplicationError proto.InternalMessageInfo
+
+func (m *ApplicationError) GetCode() int32 {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return 0
+}
+
+func (m *ApplicationError) GetDetail() string {
+	if m != nil && m.Detail != nil {
+		return *m.Detail
+	}
+	return ""
+}
+
+type RpcError struct {
+	Code                 *int32   `protobuf:"varint,1,req,name=code" json:"code,omitempty"`
+	Detail               *string  `protobuf:"bytes,2,opt,name=detail" json:"detail,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *RpcError) Reset()         { *m = RpcError{} }
+func (m *RpcError) String() string { return proto.CompactTextString(m) }
+func (*RpcError) ProtoMessage()    {}
+func (*RpcError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_remote_api_1978114ec33a273d, []int{2}
+}
+func (m *RpcError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RpcError.Unmarshal(m, b)
+}
+func (m *RpcError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RpcError.Marshal(b, m, deterministic)
+}
+func (dst *RpcError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RpcError.Merge(dst, src)
+}
+func (m *RpcError) XXX_Size() int {
+	return xxx_messageInfo_RpcError.Size(m)
+}
+func (m *RpcError) XXX_DiscardUnknown() {
+	xxx_messageInfo_RpcError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RpcError proto.InternalMessageInfo
+
+func (m *RpcError) GetCode() int32 {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return 0
+}
+
+func (m *RpcError) GetDetail() string {
+	if m != nil && m.Detail != nil {
+		return *m.Detail
+	}
+	return ""
+}
+
+type Response struct {
+	Response             []byte            `protobuf:"bytes,1,opt,name=response" json:"response,omitempty"`
+	Exception            []byte            `protobuf:"bytes,2,opt,name=exception" json:"exception,omitempty"`
+	ApplicationError     *ApplicationError `protobuf:"bytes,3,opt,name=application_error,json=applicationError" json:"application_error,omitempty"`
+	JavaException        []byte            `protobuf:"bytes,4,opt,name=java_exception,json=javaException" json:"java_exception,omitempty"`
+	RpcError             *RpcError         `protobuf:"bytes,5,opt,name=rpc_error,json=rpcError" json:"rpc_error,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *Response) Reset()         { *m = Response{} }
+func (m *Response) String() string { return proto.CompactTextString(m) }
+func (*Response) ProtoMessage()    {}
+func (*Response) Descriptor() ([]byte, []int) {
+	return fileDescriptor_remote_api_1978114ec33a273d, []int{3}
+}
+func (m *Response) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Response.Unmarshal(m, b)
+}
+func (m *Response) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Response.Marshal(b, m, deterministic)
+}
+func (dst *Response) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Response.Merge(dst, src)
+}
+func (m *Response) XXX_Size() int {
+	return xxx_messageInfo_Response.Size(m)
+}
+func (m *Response) XXX_DiscardUnknown() {
+	xxx_messageInfo_Response.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Response proto.InternalMessageInfo
+
+func (m *Response) GetResponse() []byte {
+	if m != nil {
+		return m.Response
+	}
+	return nil
+}
+
+func (m *Response) GetException() []byte {
+	if m != nil {
+		return m.Exception
+	}
+	return nil
+}
+
+func (m *Response) GetApplicationError() *ApplicationError {
+	if m != nil {
+		return m.ApplicationError
+	}
+	return nil
+}
+
+func (m *Response) GetJavaException() []byte {
+	if m != nil {
+		return m.JavaException
+	}
+	return nil
+}
+
+func (m *Response) GetRpcError() *RpcError {
+	if m != nil {
+		return m.RpcError
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*Request)(nil), "remote_api.Request")
+	proto.RegisterType((*ApplicationError)(nil), "remote_api.ApplicationError")
+	proto.RegisterType((*RpcError)(nil), "remote_api.RpcError")
+	proto.RegisterType((*Response)(nil), "remote_api.Response")
+}
+
+func init() {
+	proto.RegisterFile("google.golang.org/appengine/internal/remote_api/remote_api.proto", fileDescriptor_remote_api_1978114ec33a273d)
+}
+
+var fileDescriptor_remote_api_1978114ec33a273d = []byte{
+	// 531 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x93, 0x51, 0x6e, 0xd3, 0x40,
+	0x10, 0x86, 0xb1, 0x9b, 0x34, 0xf1, 0xc4, 0x2d, 0xdb, 0xa5, 0x14, 0x0b, 0x15, 0x29, 0x44, 0x42,
+	0xca, 0x53, 0x2a, 0x38, 0x00, 0x62, 0x63, 0x6f, 0x91, 0x85, 0x65, 0xa7, 0x6b, 0xbb, 0x50, 0x5e,
+	0x56, 0x2b, 0x67, 0x65, 0x8c, 0x12, 0xaf, 0xd9, 0x98, 0x8a, 0x17, 0x6e, 0xc0, 0xb5, 0x38, 0x0c,
+	0xb7, 0x40, 0x36, 0x6e, 0x63, 0xf5, 0x89, 0xb7, 0x7f, 0x7e, 0x7b, 0xe6, 0x1b, 0xcd, 0xcc, 0xc2,
+	0xbb, 0x5c, 0xa9, 0x7c, 0x23, 0x17, 0xb9, 0xda, 0x88, 0x32, 0x5f, 0x28, 0x9d, 0x5f, 0x88, 0xaa,
+	0x92, 0x65, 0x5e, 0x94, 0xf2, 0xa2, 0x28, 0x6b, 0xa9, 0x4b, 0xb1, 0xb9, 0xd0, 0x72, 0xab, 0x6a,
+	0xc9, 0x45, 0x55, 0xf4, 0xe4, 0xa2, 0xd2, 0xaa, 0x56, 0x18, 0xf6, 0xce, 0xec, 0x27, 0x8c, 0x98,
+	0xfc, 0xf6, 0x5d, 0xee, 0x6a, 0xfc, 0x12, 0xec, 0x9d, 0xd4, 0xb7, 0x45, 0x26, 0x79, 0x29, 0xb6,
+	0xd2, 0x31, 0xa7, 0xe6, 0xdc, 0x62, 0x93, 0xce, 0x0b, 0xc5, 0x56, 0xe2, 0x33, 0x38, 0xdc, 0xca,
+	0xfa, 0x8b, 0x5a, 0x3b, 0x07, 0xed, 0xc7, 0x2e, 0xc2, 0x0e, 0x8c, 0xf4, 0xbf, 0x2a, 0xce, 0x60,
+	0x6a, 0xce, 0x6d, 0x76, 0x17, 0xe2, 0x17, 0x00, 0x9d, 0xe4, 0xc5, 0xda, 0x19, 0x4e, 0x8d, 0xb9,
+	0xc5, 0xac, 0xce, 0xf1, 0xd7, 0xb3, 0xb7, 0x80, 0x48, 0x55, 0x6d, 0x8a, 0x4c, 0xd4, 0x85, 0x2a,
+	0xa9, 0xd6, 0x4a, 0x63, 0x0c, 0x83, 0x4c, 0xad, 0xa5, 0x63, 0x4c, 0xcd, 0xf9, 0x90, 0xb5, 0xba,
+	0x01, 0xaf, 0x65, 0x2d, 0x8a, 0x4d, 0xd7, 0x55, 0x17, 0xcd, 0x7e, 0x9b, 0x30, 0x66, 0x55, 0xf6,
+	0x7f, 0x89, 0x46, 0x2f, 0xf1, 0x97, 0x09, 0x56, 0x9b, 0xe5, 0x36, 0x7f, 0x4d, 0x60, 0x94, 0x86,
+	0x1f, 0xc2, 0xe8, 0x63, 0x88, 0x1e, 0x61, 0x0c, 0xc7, 0x2e, 0x09, 0x02, 0x1e, 0x46, 0x09, 0xbf,
+	0x8c, 0xd2, 0xd0, 0x43, 0x06, 0x7e, 0x0c, 0x93, 0x15, 0x61, 0x31, 0xe5, 0x94, 0xb1, 0x88, 0x21,
+	0x13, 0x9f, 0x01, 0x8e, 0xa9, 0x9b, 0x32, 0x3f, 0xb9, 0xe1, 0xd7, 0x7e, 0x14, 0x90, 0xc4, 0x8f,
+	0x42, 0x74, 0x80, 0x8f, 0x01, 0xa2, 0x6b, 0xca, 0xf8, 0x55, 0x1a, 0x25, 0x04, 0x0d, 0xf0, 0x53,
+	0x38, 0x61, 0xf4, 0x2a, 0xa5, 0x71, 0xc2, 0x93, 0x28, 0xe2, 0x01, 0x61, 0xef, 0x29, 0x1a, 0xe2,
+	0x67, 0xf0, 0xc4, 0x25, 0x2b, 0xb2, 0xf4, 0x83, 0xa6, 0x80, 0xe7, 0xc7, 0x64, 0x19, 0x50, 0x0f,
+	0x1d, 0xe2, 0x53, 0x40, 0x97, 0x94, 0x24, 0x29, 0xa3, 0x7b, 0x77, 0xd4, 0xe0, 0x97, 0xc4, 0xe3,
+	0x5d, 0x25, 0x34, 0x6e, 0xf0, 0x8c, 0xc6, 0xab, 0x28, 0x8c, 0x69, 0xaf, 0xae, 0x85, 0x8f, 0xc0,
+	0x72, 0x49, 0xe8, 0xd2, 0xa0, 0xc9, 0x03, 0x8c, 0xc0, 0x66, 0x74, 0x15, 0x90, 0x9b, 0xae, 0xef,
+	0x49, 0xd3, 0x8f, 0x47, 0x89, 0x17, 0xf8, 0x21, 0xe5, 0xf4, 0x93, 0x4b, 0xa9, 0x47, 0x3d, 0x64,
+	0xcf, 0xfe, 0x18, 0x30, 0x66, 0x72, 0x57, 0xa9, 0x72, 0x27, 0xf1, 0x73, 0x18, 0xeb, 0x4e, 0x3b,
+	0xc6, 0xd4, 0x98, 0xdb, 0xec, 0x3e, 0xc6, 0xe7, 0x60, 0xc9, 0x1f, 0x99, 0xac, 0x9a, 0x75, 0xb5,
+	0x23, 0xb5, 0xd9, 0xde, 0xc0, 0x3e, 0x9c, 0x88, 0xfd, 0x3a, 0xb9, 0x6c, 0x06, 0xec, 0x1c, 0x4c,
+	0x8d, 0xf9, 0xe4, 0xcd, 0xf9, 0xa2, 0x77, 0x87, 0x0f, 0x77, 0xce, 0x90, 0x78, 0x78, 0x05, 0xaf,
+	0xe0, 0xf8, 0xab, 0xb8, 0x15, 0x7c, 0x4f, 0x1b, 0xb4, 0xb4, 0xa3, 0xc6, 0xa5, 0xf7, 0xc4, 0xd7,
+	0x60, 0xe9, 0x2a, 0xeb, 0x48, 0xc3, 0x96, 0x74, 0xda, 0x27, 0xdd, 0x1d, 0x07, 0x1b, 0xeb, 0x4e,
+	0x2d, 0xed, 0xcf, 0xbd, 0x07, 0xf0, 0x37, 0x00, 0x00, 0xff, 0xff, 0x38, 0xd1, 0x0f, 0x22, 0x4f,
+	0x03, 0x00, 0x00,
+}

vendor/google.golang.org/appengine/internal/remote_api/remote_api.proto

@@ -0,0 +1,44 @@
+syntax = "proto2";
+option go_package = "remote_api";
+
+package remote_api;
+
+message Request {
+  required string service_name = 2;
+  required string method = 3;
+  required bytes request = 4;
+  optional string request_id = 5;
+}
+
+message ApplicationError {
+  required int32 code = 1;
+  required string detail = 2;
+}
+
+message RpcError {
+  enum ErrorCode {
+    UNKNOWN = 0;
+    CALL_NOT_FOUND = 1;
+    PARSE_ERROR = 2;
+    SECURITY_VIOLATION = 3;
+    OVER_QUOTA = 4;
+    REQUEST_TOO_LARGE = 5;
+    CAPABILITY_DISABLED = 6;
+    FEATURE_DISABLED = 7;
+    BAD_REQUEST = 8;
+    RESPONSE_TOO_LARGE = 9;
+    CANCELLED = 10;
+    REPLAY_ERROR = 11;
+    DEADLINE_EXCEEDED = 12;
+  }
+  required int32 code = 1;
+  optional string detail = 2;
+}
+
+message Response {
+  optional bytes response = 1;
+  optional bytes exception = 2;
+  optional ApplicationError application_error = 3;
+  optional bytes java_exception = 4;
+  optional RpcError rpc_error = 5;
+}

vendor/google.golang.org/appengine/internal/transaction.go

@@ -0,0 +1,115 @@
+// Copyright 2014 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package internal
+
+// This file implements hooks for applying datastore transactions.
+
+import (
+	"errors"
+	"reflect"
+
+	"github.com/golang/protobuf/proto"
+	netcontext "golang.org/x/net/context"
+
+	basepb "google.golang.org/appengine/internal/base"
+	pb "google.golang.org/appengine/internal/datastore"
+)
+
+var transactionSetters = make(map[reflect.Type]reflect.Value)
+
+// RegisterTransactionSetter registers a function that sets transaction information
+// in a protocol buffer message. f should be a function with two arguments,
+// the first being a protocol buffer type, and the second being *datastore.Transaction.
+func RegisterTransactionSetter(f interface{}) {
+	v := reflect.ValueOf(f)
+	transactionSetters[v.Type().In(0)] = v
+}
+
+// applyTransaction applies the transaction t to message pb
+// by using the relevant setter passed to RegisterTransactionSetter.
+func applyTransaction(pb proto.Message, t *pb.Transaction) {
+	v := reflect.ValueOf(pb)
+	if f, ok := transactionSetters[v.Type()]; ok {
+		f.Call([]reflect.Value{v, reflect.ValueOf(t)})
+	}
+}
+
+var transactionKey = "used for *Transaction"
+
+func transactionFromContext(ctx netcontext.Context) *transaction {
+	t, _ := ctx.Value(&transactionKey).(*transaction)
+	return t
+}
+
+func withTransaction(ctx netcontext.Context, t *transaction) netcontext.Context {
+	return netcontext.WithValue(ctx, &transactionKey, t)
+}
+
+type transaction struct {
+	transaction pb.Transaction
+	finished    bool
+}
+
+var ErrConcurrentTransaction = errors.New("internal: concurrent transaction")
+
+func RunTransactionOnce(c netcontext.Context, f func(netcontext.Context) error, xg bool, readOnly bool, previousTransaction *pb.Transaction) (*pb.Transaction, error) {
+	if transactionFromContext(c) != nil {
+		return nil, errors.New("nested transactions are not supported")
+	}
+
+	// Begin the transaction.
+	t := &transaction{}
+	req := &pb.BeginTransactionRequest{
+		App: proto.String(FullyQualifiedAppID(c)),
+	}
+	if xg {
+		req.AllowMultipleEg = proto.Bool(true)
+	}
+	if previousTransaction != nil {
+		req.PreviousTransaction = previousTransaction
+	}
+	if readOnly {
+		req.Mode = pb.BeginTransactionRequest_READ_ONLY.Enum()
+	} else {
+		req.Mode = pb.BeginTransactionRequest_READ_WRITE.Enum()
+	}
+	if err := Call(c, "datastore_v3", "BeginTransaction", req, &t.transaction); err != nil {
+		return nil, err
+	}
+
+	// Call f, rolling back the transaction if f returns a non-nil error, or panics.
+	// The panic is not recovered.
+	defer func() {
+		if t.finished {
+			return
+		}
+		t.finished = true
+		// Ignore the error return value, since we are already returning a non-nil
+		// error (or we're panicking).
+		Call(c, "datastore_v3", "Rollback", &t.transaction, &basepb.VoidProto{})
+	}()
+	if err := f(withTransaction(c, t)); err != nil {
+		return &t.transaction, err
+	}
+	t.finished = true
+
+	// Commit the transaction.
+	res := &pb.CommitResponse{}
+	err := Call(c, "datastore_v3", "Commit", &t.transaction, res)
+	if ae, ok := err.(*APIError); ok {
+		/* TODO: restore this conditional
+		if appengine.IsDevAppServer() {
+		*/
+		// The Python Dev AppServer raises an ApplicationError with error code 2 (which is
+		// Error.CONCURRENT_TRANSACTION) and message "Concurrency exception.".
+		if ae.Code == int32(pb.Error_BAD_REQUEST) && ae.Detail == "ApplicationError: 2 Concurrency exception." {
+			return &t.transaction, ErrConcurrentTransaction
+		}
+		if ae.Code == int32(pb.Error_CONCURRENT_TRANSACTION) {
+			return &t.transaction, ErrConcurrentTransaction
+		}
+	}
+	return &t.transaction, err
+}

vendor/google.golang.org/appengine/internal/urlfetch/urlfetch_service.pb.go

@@ -0,0 +1,527 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google.golang.org/appengine/internal/urlfetch/urlfetch_service.proto
+
+package urlfetch
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type URLFetchServiceError_ErrorCode int32
+
+const (
+	URLFetchServiceError_OK                       URLFetchServiceError_ErrorCode = 0
+	URLFetchServiceError_INVALID_URL              URLFetchServiceError_ErrorCode = 1
+	URLFetchServiceError_FETCH_ERROR              URLFetchServiceError_ErrorCode = 2
+	URLFetchServiceError_UNSPECIFIED_ERROR        URLFetchServiceError_ErrorCode = 3
+	URLFetchServiceError_RESPONSE_TOO_LARGE       URLFetchServiceError_ErrorCode = 4
+	URLFetchServiceError_DEADLINE_EXCEEDED        URLFetchServiceError_ErrorCode = 5
+	URLFetchServiceError_SSL_CERTIFICATE_ERROR    URLFetchServiceError_ErrorCode = 6
+	URLFetchServiceError_DNS_ERROR                URLFetchServiceError_ErrorCode = 7
+	URLFetchServiceError_CLOSED                   URLFetchServiceError_ErrorCode = 8
+	URLFetchServiceError_INTERNAL_TRANSIENT_ERROR URLFetchServiceError_ErrorCode = 9
+	URLFetchServiceError_TOO_MANY_REDIRECTS       URLFetchServiceError_ErrorCode = 10
+	URLFetchServiceError_MALFORMED_REPLY          URLFetchServiceError_ErrorCode = 11
+	URLFetchServiceError_CONNECTION_ERROR         URLFetchServiceError_ErrorCode = 12
+)
+
+var URLFetchServiceError_ErrorCode_name = map[int32]string{
+	0:  "OK",
+	1:  "INVALID_URL",
+	2:  "FETCH_ERROR",
+	3:  "UNSPECIFIED_ERROR",
+	4:  "RESPONSE_TOO_LARGE",
+	5:  "DEADLINE_EXCEEDED",
+	6:  "SSL_CERTIFICATE_ERROR",
+	7:  "DNS_ERROR",
+	8:  "CLOSED",
+	9:  "INTERNAL_TRANSIENT_ERROR",
+	10: "TOO_MANY_REDIRECTS",
+	11: "MALFORMED_REPLY",
+	12: "CONNECTION_ERROR",
+}
+var URLFetchServiceError_ErrorCode_value = map[string]int32{
+	"OK":                       0,
+	"INVALID_URL":              1,
+	"FETCH_ERROR":              2,
+	"UNSPECIFIED_ERROR":        3,
+	"RESPONSE_TOO_LARGE":       4,
+	"DEADLINE_EXCEEDED":        5,
+	"SSL_CERTIFICATE_ERROR":    6,
+	"DNS_ERROR":                7,
+	"CLOSED":                   8,
+	"INTERNAL_TRANSIENT_ERROR": 9,
+	"TOO_MANY_REDIRECTS":       10,
+	"MALFORMED_REPLY":          11,
+	"CONNECTION_ERROR":         12,
+}
+
+func (x URLFetchServiceError_ErrorCode) Enum() *URLFetchServiceError_ErrorCode {
+	p := new(URLFetchServiceError_ErrorCode)
+	*p = x
+	return p
+}
+func (x URLFetchServiceError_ErrorCode) String() string {
+	return proto.EnumName(URLFetchServiceError_ErrorCode_name, int32(x))
+}
+func (x *URLFetchServiceError_ErrorCode) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(URLFetchServiceError_ErrorCode_value, data, "URLFetchServiceError_ErrorCode")
+	if err != nil {
+		return err
+	}
+	*x = URLFetchServiceError_ErrorCode(value)
+	return nil
+}
+func (URLFetchServiceError_ErrorCode) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{0, 0}
+}
+
+type URLFetchRequest_RequestMethod int32
+
+const (
+	URLFetchRequest_GET    URLFetchRequest_RequestMethod = 1
+	URLFetchRequest_POST   URLFetchRequest_RequestMethod = 2
+	URLFetchRequest_HEAD   URLFetchRequest_RequestMethod = 3
+	URLFetchRequest_PUT    URLFetchRequest_RequestMethod = 4
+	URLFetchRequest_DELETE URLFetchRequest_RequestMethod = 5
+	URLFetchRequest_PATCH  URLFetchRequest_RequestMethod = 6
+)
+
+var URLFetchRequest_RequestMethod_name = map[int32]string{
+	1: "GET",
+	2: "POST",
+	3: "HEAD",
+	4: "PUT",
+	5: "DELETE",
+	6: "PATCH",
+}
+var URLFetchRequest_RequestMethod_value = map[string]int32{
+	"GET":    1,
+	"POST":   2,
+	"HEAD":   3,
+	"PUT":    4,
+	"DELETE": 5,
+	"PATCH":  6,
+}
+
+func (x URLFetchRequest_RequestMethod) Enum() *URLFetchRequest_RequestMethod {
+	p := new(URLFetchRequest_RequestMethod)
+	*p = x
+	return p
+}
+func (x URLFetchRequest_RequestMethod) String() string {
+	return proto.EnumName(URLFetchRequest_RequestMethod_name, int32(x))
+}
+func (x *URLFetchRequest_RequestMethod) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(URLFetchRequest_RequestMethod_value, data, "URLFetchRequest_RequestMethod")
+	if err != nil {
+		return err
+	}
+	*x = URLFetchRequest_RequestMethod(value)
+	return nil
+}
+func (URLFetchRequest_RequestMethod) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{1, 0}
+}
+
+type URLFetchServiceError struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *URLFetchServiceError) Reset()         { *m = URLFetchServiceError{} }
+func (m *URLFetchServiceError) String() string { return proto.CompactTextString(m) }
+func (*URLFetchServiceError) ProtoMessage()    {}
+func (*URLFetchServiceError) Descriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{0}
+}
+func (m *URLFetchServiceError) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_URLFetchServiceError.Unmarshal(m, b)
+}
+func (m *URLFetchServiceError) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_URLFetchServiceError.Marshal(b, m, deterministic)
+}
+func (dst *URLFetchServiceError) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_URLFetchServiceError.Merge(dst, src)
+}
+func (m *URLFetchServiceError) XXX_Size() int {
+	return xxx_messageInfo_URLFetchServiceError.Size(m)
+}
+func (m *URLFetchServiceError) XXX_DiscardUnknown() {
+	xxx_messageInfo_URLFetchServiceError.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_URLFetchServiceError proto.InternalMessageInfo
+
+type URLFetchRequest struct {
+	Method                        *URLFetchRequest_RequestMethod `protobuf:"varint,1,req,name=Method,enum=appengine.URLFetchRequest_RequestMethod" json:"Method,omitempty"`
+	Url                           *string                        `protobuf:"bytes,2,req,name=Url" json:"Url,omitempty"`
+	Header                        []*URLFetchRequest_Header      `protobuf:"group,3,rep,name=Header,json=header" json:"header,omitempty"`
+	Payload                       []byte                         `protobuf:"bytes,6,opt,name=Payload" json:"Payload,omitempty"`
+	FollowRedirects               *bool                          `protobuf:"varint,7,opt,name=FollowRedirects,def=1" json:"FollowRedirects,omitempty"`
+	Deadline                      *float64                       `protobuf:"fixed64,8,opt,name=Deadline" json:"Deadline,omitempty"`
+	MustValidateServerCertificate *bool                          `protobuf:"varint,9,opt,name=MustValidateServerCertificate,def=1" json:"MustValidateServerCertificate,omitempty"`
+	XXX_NoUnkeyedLiteral          struct{}                       `json:"-"`
+	XXX_unrecognized              []byte                         `json:"-"`
+	XXX_sizecache                 int32                          `json:"-"`
+}
+
+func (m *URLFetchRequest) Reset()         { *m = URLFetchRequest{} }
+func (m *URLFetchRequest) String() string { return proto.CompactTextString(m) }
+func (*URLFetchRequest) ProtoMessage()    {}
+func (*URLFetchRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{1}
+}
+func (m *URLFetchRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_URLFetchRequest.Unmarshal(m, b)
+}
+func (m *URLFetchRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_URLFetchRequest.Marshal(b, m, deterministic)
+}
+func (dst *URLFetchRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_URLFetchRequest.Merge(dst, src)
+}
+func (m *URLFetchRequest) XXX_Size() int {
+	return xxx_messageInfo_URLFetchRequest.Size(m)
+}
+func (m *URLFetchRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_URLFetchRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_URLFetchRequest proto.InternalMessageInfo
+
+const Default_URLFetchRequest_FollowRedirects bool = true
+const Default_URLFetchRequest_MustValidateServerCertificate bool = true
+
+func (m *URLFetchRequest) GetMethod() URLFetchRequest_RequestMethod {
+	if m != nil && m.Method != nil {
+		return *m.Method
+	}
+	return URLFetchRequest_GET
+}
+
+func (m *URLFetchRequest) GetUrl() string {
+	if m != nil && m.Url != nil {
+		return *m.Url
+	}
+	return ""
+}
+
+func (m *URLFetchRequest) GetHeader() []*URLFetchRequest_Header {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
+func (m *URLFetchRequest) GetPayload() []byte {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *URLFetchRequest) GetFollowRedirects() bool {
+	if m != nil && m.FollowRedirects != nil {
+		return *m.FollowRedirects
+	}
+	return Default_URLFetchRequest_FollowRedirects
+}
+
+func (m *URLFetchRequest) GetDeadline() float64 {
+	if m != nil && m.Deadline != nil {
+		return *m.Deadline
+	}
+	return 0
+}
+
+func (m *URLFetchRequest) GetMustValidateServerCertificate() bool {
+	if m != nil && m.MustValidateServerCertificate != nil {
+		return *m.MustValidateServerCertificate
+	}
+	return Default_URLFetchRequest_MustValidateServerCertificate
+}
+
+type URLFetchRequest_Header struct {
+	Key                  *string  `protobuf:"bytes,4,req,name=Key" json:"Key,omitempty"`
+	Value                *string  `protobuf:"bytes,5,req,name=Value" json:"Value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *URLFetchRequest_Header) Reset()         { *m = URLFetchRequest_Header{} }
+func (m *URLFetchRequest_Header) String() string { return proto.CompactTextString(m) }
+func (*URLFetchRequest_Header) ProtoMessage()    {}
+func (*URLFetchRequest_Header) Descriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{1, 0}
+}
+func (m *URLFetchRequest_Header) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_URLFetchRequest_Header.Unmarshal(m, b)
+}
+func (m *URLFetchRequest_Header) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_URLFetchRequest_Header.Marshal(b, m, deterministic)
+}
+func (dst *URLFetchRequest_Header) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_URLFetchRequest_Header.Merge(dst, src)
+}
+func (m *URLFetchRequest_Header) XXX_Size() int {
+	return xxx_messageInfo_URLFetchRequest_Header.Size(m)
+}
+func (m *URLFetchRequest_Header) XXX_DiscardUnknown() {
+	xxx_messageInfo_URLFetchRequest_Header.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_URLFetchRequest_Header proto.InternalMessageInfo
+
+func (m *URLFetchRequest_Header) GetKey() string {
+	if m != nil && m.Key != nil {
+		return *m.Key
+	}
+	return ""
+}
+
+func (m *URLFetchRequest_Header) GetValue() string {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return ""
+}
+
+type URLFetchResponse struct {
+	Content               []byte                     `protobuf:"bytes,1,opt,name=Content" json:"Content,omitempty"`
+	StatusCode            *int32                     `protobuf:"varint,2,req,name=StatusCode" json:"StatusCode,omitempty"`
+	Header                []*URLFetchResponse_Header `protobuf:"group,3,rep,name=Header,json=header" json:"header,omitempty"`
+	ContentWasTruncated   *bool                      `protobuf:"varint,6,opt,name=ContentWasTruncated,def=0" json:"ContentWasTruncated,omitempty"`
+	ExternalBytesSent     *int64                     `protobuf:"varint,7,opt,name=ExternalBytesSent" json:"ExternalBytesSent,omitempty"`
+	ExternalBytesReceived *int64                     `protobuf:"varint,8,opt,name=ExternalBytesReceived" json:"ExternalBytesReceived,omitempty"`
+	FinalUrl              *string                    `protobuf:"bytes,9,opt,name=FinalUrl" json:"FinalUrl,omitempty"`
+	ApiCpuMilliseconds    *int64                     `protobuf:"varint,10,opt,name=ApiCpuMilliseconds,def=0" json:"ApiCpuMilliseconds,omitempty"`
+	ApiBytesSent          *int64                     `protobuf:"varint,11,opt,name=ApiBytesSent,def=0" json:"ApiBytesSent,omitempty"`
+	ApiBytesReceived      *int64                     `protobuf:"varint,12,opt,name=ApiBytesReceived,def=0" json:"ApiBytesReceived,omitempty"`
+	XXX_NoUnkeyedLiteral  struct{}                   `json:"-"`
+	XXX_unrecognized      []byte                     `json:"-"`
+	XXX_sizecache         int32                      `json:"-"`
+}
+
+func (m *URLFetchResponse) Reset()         { *m = URLFetchResponse{} }
+func (m *URLFetchResponse) String() string { return proto.CompactTextString(m) }
+func (*URLFetchResponse) ProtoMessage()    {}
+func (*URLFetchResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{2}
+}
+func (m *URLFetchResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_URLFetchResponse.Unmarshal(m, b)
+}
+func (m *URLFetchResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_URLFetchResponse.Marshal(b, m, deterministic)
+}
+func (dst *URLFetchResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_URLFetchResponse.Merge(dst, src)
+}
+func (m *URLFetchResponse) XXX_Size() int {
+	return xxx_messageInfo_URLFetchResponse.Size(m)
+}
+func (m *URLFetchResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_URLFetchResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_URLFetchResponse proto.InternalMessageInfo
+
+const Default_URLFetchResponse_ContentWasTruncated bool = false
+const Default_URLFetchResponse_ApiCpuMilliseconds int64 = 0
+const Default_URLFetchResponse_ApiBytesSent int64 = 0
+const Default_URLFetchResponse_ApiBytesReceived int64 = 0
+
+func (m *URLFetchResponse) GetContent() []byte {
+	if m != nil {
+		return m.Content
+	}
+	return nil
+}
+
+func (m *URLFetchResponse) GetStatusCode() int32 {
+	if m != nil && m.StatusCode != nil {
+		return *m.StatusCode
+	}
+	return 0
+}
+
+func (m *URLFetchResponse) GetHeader() []*URLFetchResponse_Header {
+	if m != nil {
+		return m.Header
+	}
+	return nil
+}
+
+func (m *URLFetchResponse) GetContentWasTruncated() bool {
+	if m != nil && m.ContentWasTruncated != nil {
+		return *m.ContentWasTruncated
+	}
+	return Default_URLFetchResponse_ContentWasTruncated
+}
+
+func (m *URLFetchResponse) GetExternalBytesSent() int64 {
+	if m != nil && m.ExternalBytesSent != nil {
+		return *m.ExternalBytesSent
+	}
+	return 0
+}
+
+func (m *URLFetchResponse) GetExternalBytesReceived() int64 {
+	if m != nil && m.ExternalBytesReceived != nil {
+		return *m.ExternalBytesReceived
+	}
+	return 0
+}
+
+func (m *URLFetchResponse) GetFinalUrl() string {
+	if m != nil && m.FinalUrl != nil {
+		return *m.FinalUrl
+	}
+	return ""
+}
+
+func (m *URLFetchResponse) GetApiCpuMilliseconds() int64 {
+	if m != nil && m.ApiCpuMilliseconds != nil {
+		return *m.ApiCpuMilliseconds
+	}
+	return Default_URLFetchResponse_ApiCpuMilliseconds
+}
+
+func (m *URLFetchResponse) GetApiBytesSent() int64 {
+	if m != nil && m.ApiBytesSent != nil {
+		return *m.ApiBytesSent
+	}
+	return Default_URLFetchResponse_ApiBytesSent
+}
+
+func (m *URLFetchResponse) GetApiBytesReceived() int64 {
+	if m != nil && m.ApiBytesReceived != nil {
+		return *m.ApiBytesReceived
+	}
+	return Default_URLFetchResponse_ApiBytesReceived
+}
+
+type URLFetchResponse_Header struct {
+	Key                  *string  `protobuf:"bytes,4,req,name=Key" json:"Key,omitempty"`
+	Value                *string  `protobuf:"bytes,5,req,name=Value" json:"Value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *URLFetchResponse_Header) Reset()         { *m = URLFetchResponse_Header{} }
+func (m *URLFetchResponse_Header) String() string { return proto.CompactTextString(m) }
+func (*URLFetchResponse_Header) ProtoMessage()    {}
+func (*URLFetchResponse_Header) Descriptor() ([]byte, []int) {
+	return fileDescriptor_urlfetch_service_b245a7065f33bced, []int{2, 0}
+}
+func (m *URLFetchResponse_Header) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_URLFetchResponse_Header.Unmarshal(m, b)
+}
+func (m *URLFetchResponse_Header) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_URLFetchResponse_Header.Marshal(b, m, deterministic)
+}
+func (dst *URLFetchResponse_Header) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_URLFetchResponse_Header.Merge(dst, src)
+}
+func (m *URLFetchResponse_Header) XXX_Size() int {
+	return xxx_messageInfo_URLFetchResponse_Header.Size(m)
+}
+func (m *URLFetchResponse_Header) XXX_DiscardUnknown() {
+	xxx_messageInfo_URLFetchResponse_Header.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_URLFetchResponse_Header proto.InternalMessageInfo
+
+func (m *URLFetchResponse_Header) GetKey() string {
+	if m != nil && m.Key != nil {
+		return *m.Key
+	}
+	return ""
+}
+
+func (m *URLFetchResponse_Header) GetValue() string {
+	if m != nil && m.Value != nil {
+		return *m.Value
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*URLFetchServiceError)(nil), "appengine.URLFetchServiceError")
+	proto.RegisterType((*URLFetchRequest)(nil), "appengine.URLFetchRequest")
+	proto.RegisterType((*URLFetchRequest_Header)(nil), "appengine.URLFetchRequest.Header")
+	proto.RegisterType((*URLFetchResponse)(nil), "appengine.URLFetchResponse")
+	proto.RegisterType((*URLFetchResponse_Header)(nil), "appengine.URLFetchResponse.Header")
+}
+
+func init() {
+	proto.RegisterFile("google.golang.org/appengine/internal/urlfetch/urlfetch_service.proto", fileDescriptor_urlfetch_service_b245a7065f33bced)
+}
+
+var fileDescriptor_urlfetch_service_b245a7065f33bced = []byte{
+	// 770 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x54, 0xdd, 0x6e, 0xe3, 0x54,
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+	0x19, 0xe0, 0x33, 0x38, 0x99, 0x5a, 0xde, 0x24, 0x10, 0x53, 0xee, 0xc4, 0x82, 0xcf, 0xbc, 0x37,
+	0xec, 0x08, 0x4f, 0x81, 0xd9, 0x81, 0xef, 0x73, 0x3b, 0x72, 0x03, 0xbf, 0x69, 0x71, 0x3c, 0xfc,
+	0xc7, 0x80, 0x93, 0x9d, 0x5a, 0x82, 0x7e, 0x5f, 0x53, 0x2d, 0xf1, 0x27, 0xe8, 0x4c, 0x49, 0xde,
+	0x95, 0xa9, 0xa9, 0x0d, 0xf4, 0xd1, 0xa7, 0xaf, 0x46, 0xe3, 0xbd, 0xba, 0xe3, 0x47, 0xdc, 0x71,
+	0xf3, 0xbb, 0xe5, 0x8b, 0xe6, 0x1c, 0x32, 0x30, 0xe6, 0x55, 0x6e, 0xea, 0x03, 0x7d, 0xd4, 0x17,
+	0x2a, 0xc4, 0x1f, 0xa1, 0x73, 0x47, 0x49, 0x4a, 0x95, 0x69, 0x0c, 0x8c, 0x11, 0xbc, 0xfa, 0xea,
+	0x23, 0x3d, 0xaf, 0x36, 0x44, 0xd1, 0x1c, 0xc0, 0x17, 0xd0, 0x9d, 0x25, 0xf7, 0x79, 0x99, 0xa4,
+	0x66, 0x67, 0xa0, 0x8d, 0x8e, 0x2f, 0xf5, 0x9e, 0x26, 0x76, 0x10, 0x8e, 0xe1, 0x64, 0x52, 0xe6,
+	0x79, 0xf9, 0x87, 0xa0, 0x34, 0xab, 0x68, 0x21, 0x6b, 0xb3, 0x3b, 0xd0, 0x46, 0xbd, 0x8b, 0x96,
+	0xac, 0xd6, 0x24, 0x1e, 0x17, 0xf1, 0x39, 0xf4, 0x1c, 0x4a, 0xd2, 0x3c, 0x2b, 0xc8, 0xec, 0x0d,
+	0xb4, 0x91, 0x26, 0xf6, 0x39, 0xfe, 0x0c, 0x5f, 0x4c, 0xd7, 0xb5, 0xbc, 0x49, 0xf2, 0x2c, 0x4d,
+	0x24, 0xa9, 0xed, 0xa1, 0xca, 0xa6, 0x4a, 0x66, 0xb7, 0xd9, 0x22, 0x91, 0x64, 0xf6, 0xdf, 0xeb,
+	0xfc, 0x71, 0xea, 0xf3, 0x97, 0xd0, 0xd9, 0xfe, 0x0f, 0x25, 0xc6, 0x35, 0xdd, 0x9b, 0xad, 0xad,
+	0x18, 0xd7, 0x74, 0x8f, 0xa7, 0xd0, 0xbe, 0x49, 0xf2, 0x35, 0x99, 0xed, 0x0d, 0xb6, 0x4d, 0x86,
+	0x1e, 0x3c, 0x79, 0xa0, 0x26, 0x76, 0xc1, 0x78, 0xcd, 0x23, 0xa6, 0x61, 0x0f, 0x5a, 0xb3, 0x20,
+	0x8c, 0x98, 0xae, 0xa2, 0x2b, 0x6e, 0x39, 0xcc, 0x50, 0xc5, 0xd9, 0x3c, 0x62, 0x2d, 0xb5, 0x2e,
+	0x0e, 0xf7, 0x78, 0xc4, 0x59, 0x1b, 0xfb, 0xd0, 0x9e, 0x59, 0x91, 0x7d, 0xc5, 0x3a, 0xc3, 0x7f,
+	0x0d, 0x60, 0xef, 0x84, 0xad, 0x57, 0x65, 0x51, 0x13, 0x9a, 0xd0, 0xb5, 0xcb, 0x42, 0x52, 0x21,
+	0x4d, 0x4d, 0x49, 0x29, 0x76, 0x29, 0x7e, 0x09, 0x10, 0xca, 0x44, 0xae, 0x6b, 0xf5, 0x71, 0x6c,
+	0x8c, 0x6b, 0x8b, 0xf7, 0x10, 0xbc, 0x78, 0xe4, 0xdf, 0xf0, 0xa0, 0x7f, 0xdb, 0x6b, 0x1e, 0x1b,
+	0xf8, 0x03, 0x3c, 0x6b, 0xae, 0xf9, 0x25, 0xa9, 0xa3, 0x6a, 0x5d, 0x28, 0x81, 0xb6, 0x66, 0xf6,
+	0x2e, 0xda, 0xb7, 0x49, 0x5e, 0x93, 0x38, 0xc4, 0xc0, 0x6f, 0xe0, 0x29, 0xff, 0x73, 0xfb, 0x02,
+	0x5c, 0xde, 0x4b, 0xaa, 0x43, 0x35, 0xb8, 0x72, 0xd7, 0x10, 0x1f, 0x16, 0xf0, 0x7b, 0x38, 0x7b,
+	0x00, 0x0a, 0x5a, 0x50, 0xf6, 0x96, 0xd2, 0x8d, 0xcd, 0x86, 0x38, 0x5c, 0x54, 0xfb, 0x30, 0xc9,
+	0x8a, 0x24, 0x57, 0xfb, 0xaa, 0xec, 0xed, 0x8b, 0x7d, 0x8e, 0xdf, 0x01, 0x5a, 0xab, 0xcc, 0x5e,
+	0xad, 0xa7, 0x59, 0x9e, 0x67, 0x35, 0x2d, 0xca, 0x22, 0xad, 0x4d, 0x50, 0xed, 0x2e, 0xb4, 0x97,
+	0xe2, 0x40, 0x11, 0xbf, 0x86, 0x63, 0x6b, 0x95, 0xbd, 0x9b, 0xf6, 0x68, 0x47, 0x7e, 0x00, 0xe3,
+	0xb7, 0xc0, 0x76, 0xf9, 0x7e, 0xcc, 0xe3, 0x1d, 0xf5, 0x83, 0xd2, 0xff, 0x5f, 0xa6, 0x4b, 0xf8,
+	0xad, 0xb7, 0x7b, 0x2a, 0xff, 0x0b, 0x00, 0x00, 0xff, 0xff, 0x1d, 0x9f, 0x6d, 0x24, 0x63, 0x05,
+	0x00, 0x00,
+}

vendor/google.golang.org/appengine/internal/urlfetch/urlfetch_service.proto

@@ -0,0 +1,64 @@
+syntax = "proto2";
+option go_package = "urlfetch";
+
+package appengine;
+
+message URLFetchServiceError {
+  enum ErrorCode {
+    OK = 0;
+    INVALID_URL = 1;
+    FETCH_ERROR = 2;
+    UNSPECIFIED_ERROR = 3;
+    RESPONSE_TOO_LARGE = 4;
+    DEADLINE_EXCEEDED = 5;
+    SSL_CERTIFICATE_ERROR = 6;
+    DNS_ERROR = 7;
+    CLOSED = 8;
+    INTERNAL_TRANSIENT_ERROR = 9;
+    TOO_MANY_REDIRECTS = 10;
+    MALFORMED_REPLY = 11;
+    CONNECTION_ERROR = 12;
+  }
+}
+
+message URLFetchRequest {
+  enum RequestMethod {
+    GET = 1;
+    POST = 2;
+    HEAD = 3;
+    PUT = 4;
+    DELETE = 5;
+    PATCH = 6;
+  }
+  required RequestMethod Method = 1;
+  required string Url = 2;
+  repeated group Header = 3 {
+    required string Key = 4;
+    required string Value = 5;
+  }
+  optional bytes Payload = 6 [ctype=CORD];
+
+  optional bool FollowRedirects = 7 [default=true];
+
+  optional double Deadline = 8;
+
+  optional bool MustValidateServerCertificate = 9 [default=true];
+}
+
+message URLFetchResponse {
+  optional bytes Content = 1;
+  required int32 StatusCode = 2;
+  repeated group Header = 3 {
+    required string Key = 4;
+    required string Value = 5;
+  }
+  optional bool ContentWasTruncated = 6 [default=false];
+  optional int64 ExternalBytesSent = 7;
+  optional int64 ExternalBytesReceived = 8;
+
+  optional string FinalUrl = 9;
+
+  optional int64 ApiCpuMilliseconds = 10 [default=0];
+  optional int64 ApiBytesSent = 11 [default=0];
+  optional int64 ApiBytesReceived = 12 [default=0];
+}

vendor/google.golang.org/appengine/namespace.go

@@ -0,0 +1,25 @@
+// Copyright 2012 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package appengine
+
+import (
+	"fmt"
+	"regexp"
+
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+)
+
+// Namespace returns a replacement context that operates within the given namespace.
+func Namespace(c context.Context, namespace string) (context.Context, error) {
+	if !validNamespace.MatchString(namespace) {
+		return nil, fmt.Errorf("appengine: namespace %q does not match /%s/", namespace, validNamespace)
+	}
+	return internal.NamespacedContext(c, namespace), nil
+}
+
+// validNamespace matches valid namespace names.
+var validNamespace = regexp.MustCompile(`^[0-9A-Za-z._-]{0,100}$`)

vendor/google.golang.org/appengine/timeout.go

@@ -0,0 +1,20 @@
+// Copyright 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package appengine
+
+import "golang.org/x/net/context"
+
+// IsTimeoutError reports whether err is a timeout error.
+func IsTimeoutError(err error) bool {
+	if err == context.DeadlineExceeded {
+		return true
+	}
+	if t, ok := err.(interface {
+		IsTimeout() bool
+	}); ok {
+		return t.IsTimeout()
+	}
+	return false
+}

vendor/google.golang.org/appengine/travis_install.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+
+if [[ $GO111MODULE == "on" ]]; then
+  go get .
+else
+  go get -u -v $(go list -f '{{join .Imports "\n"}}{{"\n"}}{{join .TestImports "\n"}}' ./... | sort | uniq | grep -v appengine)
+fi
+
+if [[ $GOAPP == "true" ]]; then
+  mkdir /tmp/sdk
+  curl -o /tmp/sdk.zip "https://storage.googleapis.com/appengine-sdks/featured/go_appengine_sdk_linux_amd64-1.9.68.zip"
+  unzip -q /tmp/sdk.zip -d /tmp/sdk
+  # NOTE: Set the following env vars in the test script:
+  # export PATH="$PATH:/tmp/sdk/go_appengine"
+  # export APPENGINE_DEV_APPSERVER=/tmp/sdk/go_appengine/dev_appserver.py
+fi
+

vendor/google.golang.org/appengine/travis_test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+go version
+go test -v google.golang.org/appengine/...
+go test -v -race google.golang.org/appengine/...
+if [[ $GOAPP == "true" ]]; then
+  export PATH="$PATH:/tmp/sdk/go_appengine"
+  export APPENGINE_DEV_APPSERVER=/tmp/sdk/go_appengine/dev_appserver.py
+  goapp version
+  goapp test -v google.golang.org/appengine/...
+fi

vendor/google.golang.org/appengine/urlfetch/urlfetch.go

@@ -0,0 +1,210 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// Package urlfetch provides an http.RoundTripper implementation
+// for fetching URLs via App Engine's urlfetch service.
+package urlfetch // import "google.golang.org/appengine/urlfetch"
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+	pb "google.golang.org/appengine/internal/urlfetch"
+)
+
+// Transport is an implementation of http.RoundTripper for
+// App Engine. Users should generally create an http.Client using
+// this transport and use the Client rather than using this transport
+// directly.
+type Transport struct {
+	Context context.Context
+
+	// Controls whether the application checks the validity of SSL certificates
+	// over HTTPS connections. A value of false (the default) instructs the
+	// application to send a request to the server only if the certificate is
+	// valid and signed by a trusted certificate authority (CA), and also
+	// includes a hostname that matches the certificate. A value of true
+	// instructs the application to perform no certificate validation.
+	AllowInvalidServerCertificate bool
+}
+
+// Verify statically that *Transport implements http.RoundTripper.
+var _ http.RoundTripper = (*Transport)(nil)
+
+// Client returns an *http.Client using a default urlfetch Transport. This
+// client will have the default deadline of 5 seconds, and will check the
+// validity of SSL certificates.
+//
+// Any deadline of the provided context will be used for requests through this client;
+// if the client does not have a deadline then a 5 second default is used.
+func Client(ctx context.Context) *http.Client {
+	return &http.Client{
+		Transport: &Transport{
+			Context: ctx,
+		},
+	}
+}
+
+type bodyReader struct {
+	content   []byte
+	truncated bool
+	closed    bool
+}
+
+// ErrTruncatedBody is the error returned after the final Read() from a
+// response's Body if the body has been truncated by App Engine's proxy.
+var ErrTruncatedBody = errors.New("urlfetch: truncated body")
+
+func statusCodeToText(code int) string {
+	if t := http.StatusText(code); t != "" {
+		return t
+	}
+	return strconv.Itoa(code)
+}
+
+func (br *bodyReader) Read(p []byte) (n int, err error) {
+	if br.closed {
+		if br.truncated {
+			return 0, ErrTruncatedBody
+		}
+		return 0, io.EOF
+	}
+	n = copy(p, br.content)
+	if n > 0 {
+		br.content = br.content[n:]
+		return
+	}
+	if br.truncated {
+		br.closed = true
+		return 0, ErrTruncatedBody
+	}
+	return 0, io.EOF
+}
+
+func (br *bodyReader) Close() error {
+	br.closed = true
+	br.content = nil
+	return nil
+}
+
+// A map of the URL Fetch-accepted methods that take a request body.
+var methodAcceptsRequestBody = map[string]bool{
+	"POST":  true,
+	"PUT":   true,
+	"PATCH": true,
+}
+
+// urlString returns a valid string given a URL. This function is necessary because
+// the String method of URL doesn't correctly handle URLs with non-empty Opaque values.
+// See http://code.google.com/p/go/issues/detail?id=4860.
+func urlString(u *url.URL) string {
+	if u.Opaque == "" || strings.HasPrefix(u.Opaque, "//") {
+		return u.String()
+	}
+	aux := *u
+	aux.Opaque = "//" + aux.Host + aux.Opaque
+	return aux.String()
+}
+
+// RoundTrip issues a single HTTP request and returns its response. Per the
+// http.RoundTripper interface, RoundTrip only returns an error if there
+// was an unsupported request or the URL Fetch proxy fails.
+// Note that HTTP response codes such as 5xx, 403, 404, etc are not
+// errors as far as the transport is concerned and will be returned
+// with err set to nil.
+func (t *Transport) RoundTrip(req *http.Request) (res *http.Response, err error) {
+	methNum, ok := pb.URLFetchRequest_RequestMethod_value[req.Method]
+	if !ok {
+		return nil, fmt.Errorf("urlfetch: unsupported HTTP method %q", req.Method)
+	}
+
+	method := pb.URLFetchRequest_RequestMethod(methNum)
+
+	freq := &pb.URLFetchRequest{
+		Method:                        &method,
+		Url:                           proto.String(urlString(req.URL)),
+		FollowRedirects:               proto.Bool(false), // http.Client's responsibility
+		MustValidateServerCertificate: proto.Bool(!t.AllowInvalidServerCertificate),
+	}
+	if deadline, ok := t.Context.Deadline(); ok {
+		freq.Deadline = proto.Float64(deadline.Sub(time.Now()).Seconds())
+	}
+
+	for k, vals := range req.Header {
+		for _, val := range vals {
+			freq.Header = append(freq.Header, &pb.URLFetchRequest_Header{
+				Key:   proto.String(k),
+				Value: proto.String(val),
+			})
+		}
+	}
+	if methodAcceptsRequestBody[req.Method] && req.Body != nil {
+		// Avoid a []byte copy if req.Body has a Bytes method.
+		switch b := req.Body.(type) {
+		case interface {
+			Bytes() []byte
+		}:
+			freq.Payload = b.Bytes()
+		default:
+			freq.Payload, err = ioutil.ReadAll(req.Body)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	fres := &pb.URLFetchResponse{}
+	if err := internal.Call(t.Context, "urlfetch", "Fetch", freq, fres); err != nil {
+		return nil, err
+	}
+
+	res = &http.Response{}
+	res.StatusCode = int(*fres.StatusCode)
+	res.Status = fmt.Sprintf("%d %s", res.StatusCode, statusCodeToText(res.StatusCode))
+	res.Header = make(http.Header)
+	res.Request = req
+
+	// Faked:
+	res.ProtoMajor = 1
+	res.ProtoMinor = 1
+	res.Proto = "HTTP/1.1"
+	res.Close = true
+
+	for _, h := range fres.Header {
+		hkey := http.CanonicalHeaderKey(*h.Key)
+		hval := *h.Value
+		if hkey == "Content-Length" {
+			// Will get filled in below for all but HEAD requests.
+			if req.Method == "HEAD" {
+				res.ContentLength, _ = strconv.ParseInt(hval, 10, 64)
+			}
+			continue
+		}
+		res.Header.Add(hkey, hval)
+	}
+
+	if req.Method != "HEAD" {
+		res.ContentLength = int64(len(fres.Content))
+	}
+
+	truncated := fres.GetContentWasTruncated()
+	res.Body = &bodyReader{content: fres.Content, truncated: truncated}
+	return
+}
+
+func init() {
+	internal.RegisterErrorCodeMap("urlfetch", pb.URLFetchServiceError_ErrorCode_name)
+	internal.RegisterTimeoutErrorCode("urlfetch", int32(pb.URLFetchServiceError_DEADLINE_EXCEEDED))
+}

vendor/google.golang.org/genproto/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/google.golang.org/genproto/googleapis/rpc/code/code.pb.go

@@ -0,0 +1,336 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.12.2
+// source: google/rpc/code.proto
+
+package code
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// The canonical error codes for gRPC APIs.
+//
+//
+// Sometimes multiple error codes may apply.  Services should return
+// the most specific error code that applies.  For example, prefer
+// `OUT_OF_RANGE` over `FAILED_PRECONDITION` if both codes apply.
+// Similarly prefer `NOT_FOUND` or `ALREADY_EXISTS` over `FAILED_PRECONDITION`.
+type Code int32
+
+const (
+	// Not an error; returned on success
+	//
+	// HTTP Mapping: 200 OK
+	Code_OK Code = 0
+	// The operation was cancelled, typically by the caller.
+	//
+	// HTTP Mapping: 499 Client Closed Request
+	Code_CANCELLED Code = 1
+	// Unknown error.  For example, this error may be returned when
+	// a `Status` value received from another address space belongs to
+	// an error space that is not known in this address space.  Also
+	// errors raised by APIs that do not return enough error information
+	// may be converted to this error.
+	//
+	// HTTP Mapping: 500 Internal Server Error
+	Code_UNKNOWN Code = 2
+	// The client specified an invalid argument.  Note that this differs
+	// from `FAILED_PRECONDITION`.  `INVALID_ARGUMENT` indicates arguments
+	// that are problematic regardless of the state of the system
+	// (e.g., a malformed file name).
+	//
+	// HTTP Mapping: 400 Bad Request
+	Code_INVALID_ARGUMENT Code = 3
+	// The deadline expired before the operation could complete. For operations
+	// that change the state of the system, this error may be returned
+	// even if the operation has completed successfully.  For example, a
+	// successful response from a server could have been delayed long
+	// enough for the deadline to expire.
+	//
+	// HTTP Mapping: 504 Gateway Timeout
+	Code_DEADLINE_EXCEEDED Code = 4
+	// Some requested entity (e.g., file or directory) was not found.
+	//
+	// Note to server developers: if a request is denied for an entire class
+	// of users, such as gradual feature rollout or undocumented whitelist,
+	// `NOT_FOUND` may be used. If a request is denied for some users within
+	// a class of users, such as user-based access control, `PERMISSION_DENIED`
+	// must be used.
+	//
+	// HTTP Mapping: 404 Not Found
+	Code_NOT_FOUND Code = 5
+	// The entity that a client attempted to create (e.g., file or directory)
+	// already exists.
+	//
+	// HTTP Mapping: 409 Conflict
+	Code_ALREADY_EXISTS Code = 6
+	// The caller does not have permission to execute the specified
+	// operation. `PERMISSION_DENIED` must not be used for rejections
+	// caused by exhausting some resource (use `RESOURCE_EXHAUSTED`
+	// instead for those errors). `PERMISSION_DENIED` must not be
+	// used if the caller can not be identified (use `UNAUTHENTICATED`
+	// instead for those errors). This error code does not imply the
+	// request is valid or the requested entity exists or satisfies
+	// other pre-conditions.
+	//
+	// HTTP Mapping: 403 Forbidden
+	Code_PERMISSION_DENIED Code = 7
+	// The request does not have valid authentication credentials for the
+	// operation.
+	//
+	// HTTP Mapping: 401 Unauthorized
+	Code_UNAUTHENTICATED Code = 16
+	// Some resource has been exhausted, perhaps a per-user quota, or
+	// perhaps the entire file system is out of space.
+	//
+	// HTTP Mapping: 429 Too Many Requests
+	Code_RESOURCE_EXHAUSTED Code = 8
+	// The operation was rejected because the system is not in a state
+	// required for the operation's execution.  For example, the directory
+	// to be deleted is non-empty, an rmdir operation is applied to
+	// a non-directory, etc.
+	//
+	// Service implementors can use the following guidelines to decide
+	// between `FAILED_PRECONDITION`, `ABORTED`, and `UNAVAILABLE`:
+	//  (a) Use `UNAVAILABLE` if the client can retry just the failing call.
+	//  (b) Use `ABORTED` if the client should retry at a higher level
+	//      (e.g., when a client-specified test-and-set fails, indicating the
+	//      client should restart a read-modify-write sequence).
+	//  (c) Use `FAILED_PRECONDITION` if the client should not retry until
+	//      the system state has been explicitly fixed.  E.g., if an "rmdir"
+	//      fails because the directory is non-empty, `FAILED_PRECONDITION`
+	//      should be returned since the client should not retry unless
+	//      the files are deleted from the directory.
+	//
+	// HTTP Mapping: 400 Bad Request
+	Code_FAILED_PRECONDITION Code = 9
+	// The operation was aborted, typically due to a concurrency issue such as
+	// a sequencer check failure or transaction abort.
+	//
+	// See the guidelines above for deciding between `FAILED_PRECONDITION`,
+	// `ABORTED`, and `UNAVAILABLE`.
+	//
+	// HTTP Mapping: 409 Conflict
+	Code_ABORTED Code = 10
+	// The operation was attempted past the valid range.  E.g., seeking or
+	// reading past end-of-file.
+	//
+	// Unlike `INVALID_ARGUMENT`, this error indicates a problem that may
+	// be fixed if the system state changes. For example, a 32-bit file
+	// system will generate `INVALID_ARGUMENT` if asked to read at an
+	// offset that is not in the range [0,2^32-1], but it will generate
+	// `OUT_OF_RANGE` if asked to read from an offset past the current
+	// file size.
+	//
+	// There is a fair bit of overlap between `FAILED_PRECONDITION` and
+	// `OUT_OF_RANGE`.  We recommend using `OUT_OF_RANGE` (the more specific
+	// error) when it applies so that callers who are iterating through
+	// a space can easily look for an `OUT_OF_RANGE` error to detect when
+	// they are done.
+	//
+	// HTTP Mapping: 400 Bad Request
+	Code_OUT_OF_RANGE Code = 11
+	// The operation is not implemented or is not supported/enabled in this
+	// service.
+	//
+	// HTTP Mapping: 501 Not Implemented
+	Code_UNIMPLEMENTED Code = 12
+	// Internal errors.  This means that some invariants expected by the
+	// underlying system have been broken.  This error code is reserved
+	// for serious errors.
+	//
+	// HTTP Mapping: 500 Internal Server Error
+	Code_INTERNAL Code = 13
+	// The service is currently unavailable.  This is most likely a
+	// transient condition, which can be corrected by retrying with
+	// a backoff. Note that it is not always safe to retry
+	// non-idempotent operations.
+	//
+	// See the guidelines above for deciding between `FAILED_PRECONDITION`,
+	// `ABORTED`, and `UNAVAILABLE`.
+	//
+	// HTTP Mapping: 503 Service Unavailable
+	Code_UNAVAILABLE Code = 14
+	// Unrecoverable data loss or corruption.
+	//
+	// HTTP Mapping: 500 Internal Server Error
+	Code_DATA_LOSS Code = 15
+)
+
+// Enum value maps for Code.
+var (
+	Code_name = map[int32]string{
+		0:  "OK",
+		1:  "CANCELLED",
+		2:  "UNKNOWN",
+		3:  "INVALID_ARGUMENT",
+		4:  "DEADLINE_EXCEEDED",
+		5:  "NOT_FOUND",
+		6:  "ALREADY_EXISTS",
+		7:  "PERMISSION_DENIED",
+		16: "UNAUTHENTICATED",
+		8:  "RESOURCE_EXHAUSTED",
+		9:  "FAILED_PRECONDITION",
+		10: "ABORTED",
+		11: "OUT_OF_RANGE",
+		12: "UNIMPLEMENTED",
+		13: "INTERNAL",
+		14: "UNAVAILABLE",
+		15: "DATA_LOSS",
+	}
+	Code_value = map[string]int32{
+		"OK":                  0,
+		"CANCELLED":           1,
+		"UNKNOWN":             2,
+		"INVALID_ARGUMENT":    3,
+		"DEADLINE_EXCEEDED":   4,
+		"NOT_FOUND":           5,
+		"ALREADY_EXISTS":      6,
+		"PERMISSION_DENIED":   7,
+		"UNAUTHENTICATED":     16,
+		"RESOURCE_EXHAUSTED":  8,
+		"FAILED_PRECONDITION": 9,
+		"ABORTED":             10,
+		"OUT_OF_RANGE":        11,
+		"UNIMPLEMENTED":       12,
+		"INTERNAL":            13,
+		"UNAVAILABLE":         14,
+		"DATA_LOSS":           15,
+	}
+)
+
+func (x Code) Enum() *Code {
+	p := new(Code)
+	*p = x
+	return p
+}
+
+func (x Code) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Code) Descriptor() protoreflect.EnumDescriptor {
+	return file_google_rpc_code_proto_enumTypes[0].Descriptor()
+}
+
+func (Code) Type() protoreflect.EnumType {
+	return &file_google_rpc_code_proto_enumTypes[0]
+}
+
+func (x Code) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Code.Descriptor instead.
+func (Code) EnumDescriptor() ([]byte, []int) {
+	return file_google_rpc_code_proto_rawDescGZIP(), []int{0}
+}
+
+var File_google_rpc_code_proto protoreflect.FileDescriptor
+
+var file_google_rpc_code_proto_rawDesc = []byte{
+	0x0a, 0x15, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x64,
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+	0x67, 0x65, 0x6e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61,
+	0x70, 0x69, 0x73, 0x2f, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x64, 0x65, 0x3b, 0x63, 0x6f, 0x64,
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+}
+
+var (
+	file_google_rpc_code_proto_rawDescOnce sync.Once
+	file_google_rpc_code_proto_rawDescData = file_google_rpc_code_proto_rawDesc
+)
+
+func file_google_rpc_code_proto_rawDescGZIP() []byte {
+	file_google_rpc_code_proto_rawDescOnce.Do(func() {
+		file_google_rpc_code_proto_rawDescData = protoimpl.X.CompressGZIP(file_google_rpc_code_proto_rawDescData)
+	})
+	return file_google_rpc_code_proto_rawDescData
+}
+
+var file_google_rpc_code_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_google_rpc_code_proto_goTypes = []interface{}{
+	(Code)(0), // 0: google.rpc.Code
+}
+var file_google_rpc_code_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_google_rpc_code_proto_init() }
+func file_google_rpc_code_proto_init() {
+	if File_google_rpc_code_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_google_rpc_code_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_google_rpc_code_proto_goTypes,
+		DependencyIndexes: file_google_rpc_code_proto_depIdxs,
+		EnumInfos:         file_google_rpc_code_proto_enumTypes,
+	}.Build()
+	File_google_rpc_code_proto = out.File
+	file_google_rpc_code_proto_rawDesc = nil
+	file_google_rpc_code_proto_goTypes = nil
+	file_google_rpc_code_proto_depIdxs = nil
+}

vendor/google.golang.org/genproto/googleapis/rpc/status/status.pb.go

@@ -0,0 +1,201 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.12.2
+// source: google/rpc/status.proto
+
+package status
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	anypb "google.golang.org/protobuf/types/known/anypb"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// The `Status` type defines a logical error model that is suitable for
+// different programming environments, including REST APIs and RPC APIs. It is
+// used by [gRPC](https://github.com/grpc). Each `Status` message contains
+// three pieces of data: error code, error message, and error details.
+//
+// You can find out more about this error model and how to work with it in the
+// [API Design Guide](https://cloud.google.com/apis/design/errors).
+type Status struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The status code, which should be an enum value of [google.rpc.Code][google.rpc.Code].
+	Code int32 `protobuf:"varint,1,opt,name=code,proto3" json:"code,omitempty"`
+	// A developer-facing error message, which should be in English. Any
+	// user-facing error message should be localized and sent in the
+	// [google.rpc.Status.details][google.rpc.Status.details] field, or localized by the client.
+	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+	// A list of messages that carry the error details.  There is a common set of
+	// message types for APIs to use.
+	Details []*anypb.Any `protobuf:"bytes,3,rep,name=details,proto3" json:"details,omitempty"`
+}
+
+func (x *Status) Reset() {
+	*x = Status{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_google_rpc_status_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Status) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Status) ProtoMessage() {}
+
+func (x *Status) ProtoReflect() protoreflect.Message {
+	mi := &file_google_rpc_status_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Status.ProtoReflect.Descriptor instead.
+func (*Status) Descriptor() ([]byte, []int) {
+	return file_google_rpc_status_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Status) GetCode() int32 {
+	if x != nil {
+		return x.Code
+	}
+	return 0
+}
+
+func (x *Status) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+func (x *Status) GetDetails() []*anypb.Any {
+	if x != nil {
+		return x.Details
+	}
+	return nil
+}
+
+var File_google_rpc_status_proto protoreflect.FileDescriptor
+
+var file_google_rpc_status_proto_rawDesc = []byte{
+	0x0a, 0x17, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x72, 0x70, 0x63, 0x2f, 0x73, 0x74, 0x61,
+	0x74, 0x75, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0a, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x65, 0x2e, 0x72, 0x70, 0x63, 0x1a, 0x19, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x61, 0x6e, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x22, 0x66, 0x0a, 0x06, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x12, 0x12, 0x0a, 0x04, 0x63, 0x6f,
+	0x64, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x04, 0x63, 0x6f, 0x64, 0x65, 0x12, 0x18,
+	0x0a, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52,
+	0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x2e, 0x0a, 0x07, 0x64, 0x65, 0x74, 0x61,
+	0x69, 0x6c, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x6f, 0x67,
+	0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x41, 0x6e, 0x79, 0x52,
+	0x07, 0x64, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x73, 0x42, 0x61, 0x0a, 0x0e, 0x63, 0x6f, 0x6d, 0x2e,
+	0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x72, 0x70, 0x63, 0x42, 0x0b, 0x53, 0x74, 0x61, 0x74,
+	0x75, 0x73, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x37, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x65, 0x2e, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x67, 0x65, 0x6e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73,
+	0x2f, 0x72, 0x70, 0x63, 0x2f, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x3b, 0x73, 0x74, 0x61, 0x74,
+	0x75, 0x73, 0xf8, 0x01, 0x01, 0xa2, 0x02, 0x03, 0x52, 0x50, 0x43, 0x62, 0x06, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x33,
+}
+
+var (
+	file_google_rpc_status_proto_rawDescOnce sync.Once
+	file_google_rpc_status_proto_rawDescData = file_google_rpc_status_proto_rawDesc
+)
+
+func file_google_rpc_status_proto_rawDescGZIP() []byte {
+	file_google_rpc_status_proto_rawDescOnce.Do(func() {
+		file_google_rpc_status_proto_rawDescData = protoimpl.X.CompressGZIP(file_google_rpc_status_proto_rawDescData)
+	})
+	return file_google_rpc_status_proto_rawDescData
+}
+
+var file_google_rpc_status_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_google_rpc_status_proto_goTypes = []interface{}{
+	(*Status)(nil),    // 0: google.rpc.Status
+	(*anypb.Any)(nil), // 1: google.protobuf.Any
+}
+var file_google_rpc_status_proto_depIdxs = []int32{
+	1, // 0: google.rpc.Status.details:type_name -> google.protobuf.Any
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_google_rpc_status_proto_init() }
+func file_google_rpc_status_proto_init() {
+	if File_google_rpc_status_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_google_rpc_status_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Status); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_google_rpc_status_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_google_rpc_status_proto_goTypes,
+		DependencyIndexes: file_google_rpc_status_proto_depIdxs,
+		MessageInfos:      file_google_rpc_status_proto_msgTypes,
+	}.Build()
+	File_google_rpc_status_proto = out.File
+	file_google_rpc_status_proto_rawDesc = nil
+	file_google_rpc_status_proto_goTypes = nil
+	file_google_rpc_status_proto_depIdxs = nil
+}

vendor/google.golang.org/grpc/AUTHORS

@@ -0,0 +1 @@
+Google Inc.

vendor/google.golang.org/grpc/CODE-OF-CONDUCT.md

@@ -0,0 +1,3 @@
+## Community Code of Conduct
+
+gRPC follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).

vendor/google.golang.org/grpc/CONTRIBUTING.md

@@ -0,0 +1,61 @@
+# How to contribute
+
+We definitely welcome your patches and contributions to gRPC! Please read the gRPC
+organization's [governance rules](https://github.com/grpc/grpc-community/blob/master/governance.md)
+and [contribution guidelines](https://github.com/grpc/grpc-community/blob/master/CONTRIBUTING.md) before proceeding.
+
+If you are new to github, please start by reading [Pull Request howto](https://help.github.com/articles/about-pull-requests/)
+
+## Legal requirements
+
+In order to protect both you and ourselves, you will need to sign the
+[Contributor License Agreement](https://identity.linuxfoundation.org/projects/cncf).
+
+## Guidelines for Pull Requests
+How to get your contributions merged smoothly and quickly.
+
+- Create **small PRs** that are narrowly focused on **addressing a single
+  concern**. We often times receive PRs that are trying to fix several things at
+  a time, but only one fix is considered acceptable, nothing gets merged and
+  both author's & review's time is wasted. Create more PRs to address different
+  concerns and everyone will be happy.
+
+- The grpc package should only depend on standard Go packages and a small number
+  of exceptions. If your contribution introduces new dependencies which are NOT
+  in the [list](https://godoc.org/google.golang.org/grpc?imports), you need a
+  discussion with gRPC-Go authors and consultants.
+
+- For speculative changes, consider opening an issue and discussing it first. If
+  you are suggesting a behavioral or API change, consider starting with a [gRFC
+  proposal](https://github.com/grpc/proposal).
+
+- Provide a good **PR description** as a record of **what** change is being made
+  and **why** it was made. Link to a github issue if it exists.
+
+- Don't fix code style and formatting unless you are already changing that line
+  to address an issue. PRs with irrelevant changes won't be merged. If you do
+  want to fix formatting or style, do that in a separate PR.
+
+- Unless your PR is trivial, you should expect there will be reviewer comments
+  that you'll need to address before merging. We expect you to be reasonably
+  responsive to those comments, otherwise the PR will be closed after 2-3 weeks
+  of inactivity.
+
+- Maintain **clean commit history** and use **meaningful commit messages**. PRs
+  with messy commit history are difficult to review and won't be merged. Use
+  `rebase -i upstream/master` to curate your commit history and/or to bring in
+  latest changes from master (but avoid rebasing in the middle of a code
+  review).
+
+- Keep your PR up to date with upstream/master (if there are merge conflicts, we
+  can't really merge your change).
+
+- **All tests need to be passing** before your change can be merged. We
+  recommend you **run tests locally** before creating your PR to catch breakages
+  early on.
+  - `make all` to test everything, OR
+  - `make vet` to catch vet errors
+  - `make test` to run the tests
+  - `make testrace` to run tests in race mode
+
+- Exceptions to the rules can be made if there's a compelling reason for doing so.

vendor/google.golang.org/grpc/GOVERNANCE.md

@@ -0,0 +1 @@
+This repository is governed by the gRPC organization's [governance rules](https://github.com/grpc/grpc-community/blob/master/governance.md).

vendor/google.golang.org/grpc/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/google.golang.org/grpc/MAINTAINERS.md

@@ -0,0 +1,27 @@
+This page lists all active maintainers of this repository. If you were a
+maintainer and would like to add your name to the Emeritus list, please send us a
+PR.
+
+See [GOVERNANCE.md](https://github.com/grpc/grpc-community/blob/master/governance.md)
+for governance guidelines and how to become a maintainer.
+See [CONTRIBUTING.md](https://github.com/grpc/grpc-community/blob/master/CONTRIBUTING.md)
+for general contribution guidelines.
+
+## Maintainers (in alphabetical order)
+- [canguler](https://github.com/canguler), Google LLC
+- [cesarghali](https://github.com/cesarghali), Google LLC
+- [dfawley](https://github.com/dfawley), Google LLC
+- [easwars](https://github.com/easwars), Google LLC
+- [jadekler](https://github.com/jadekler), Google LLC
+- [menghanl](https://github.com/menghanl), Google LLC
+- [srini100](https://github.com/srini100), Google LLC
+
+## Emeritus Maintainers (in alphabetical order)
+- [adelez](https://github.com/adelez), Google LLC
+- [iamqizhao](https://github.com/iamqizhao), Google LLC
+- [jtattermusch](https://github.com/jtattermusch), Google LLC
+- [lyuxuan](https://github.com/lyuxuan), Google LLC
+- [makmukhi](https://github.com/makmukhi), Google LLC
+- [matt-kwong](https://github.com/matt-kwong), Google LLC
+- [nicolasnoble](https://github.com/nicolasnoble), Google LLC
+- [yongni](https://github.com/yongni), Google LLC

vendor/google.golang.org/grpc/Makefile

@@ -0,0 +1,48 @@
+all: vet test testrace
+
+build:
+	go build google.golang.org/grpc/...
+
+clean:
+	go clean -i google.golang.org/grpc/...
+
+deps:
+	GO111MODULE=on go get -d -v google.golang.org/grpc/...
+
+proto:
+	@ if ! which protoc > /dev/null; then \
+		echo "error: protoc not installed" >&2; \
+		exit 1; \
+	fi
+	go generate google.golang.org/grpc/...
+
+test:
+	go test -cpu 1,4 -timeout 7m google.golang.org/grpc/...
+
+testsubmodule:
+	cd security/advancedtls && go test -cpu 1,4 -timeout 7m google.golang.org/grpc/security/advancedtls/...
+	cd security/authorization && go test -cpu 1,4 -timeout 7m google.golang.org/grpc/security/authorization/...
+
+testrace:
+	go test -race -cpu 1,4 -timeout 7m google.golang.org/grpc/...
+
+testdeps:
+	GO111MODULE=on go get -d -v -t google.golang.org/grpc/...
+
+vet: vetdeps
+	./vet.sh
+
+vetdeps:
+	./vet.sh -install
+
+.PHONY: \
+	all \
+	build \
+	clean \
+	proto \
+	test \
+	testappengine \
+	testappenginedeps \
+	testrace \
+	vet \
+	vetdeps

vendor/google.golang.org/grpc/README.md

@@ -0,0 +1,141 @@
+# gRPC-Go
+
+[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go)
+[![GoDoc](https://pkg.go.dev/badge/google.golang.org/grpc)][API]
+[![GoReportCard](https://goreportcard.com/badge/grpc/grpc-go)](https://goreportcard.com/report/github.com/grpc/grpc-go)
+
+The [Go][] implementation of [gRPC][]: A high performance, open source, general
+RPC framework that puts mobile and HTTP/2 first. For more information see the
+[Go gRPC docs][], or jump directly into the [quick start][].
+
+## Prerequisites
+
+- **[Go][]**: any one of the **three latest major** [releases][go-releases].
+
+## Installation
+
+With [Go module][] support (Go 1.11+), simply add the following import
+
+```go
+import "google.golang.org/grpc"
+```
+
+to your code, and then `go [build|run|test]` will automatically fetch the
+necessary dependencies.
+
+Otherwise, to install the `grpc-go` package, run the following command:
+
+```console
+$ go get -u google.golang.org/grpc
+```
+
+> **Note:** If you are trying to access `grpc-go` from **China**, see the
+> [FAQ](#FAQ) below.
+
+## Learn more
+
+- [Go gRPC docs][], which include a [quick start][] and [API
+  reference][API] among other resources
+- [Low-level technical docs](Documentation) from this repository
+- [Performance benchmark][]
+- [Examples](examples)
+
+## FAQ
+
+### I/O Timeout Errors
+
+The `golang.org` domain may be blocked from some countries. `go get` usually
+produces an error like the following when this happens:
+
+```console
+$ go get -u google.golang.org/grpc
+package google.golang.org/grpc: unrecognized import path "google.golang.org/grpc" (https fetch: Get https://google.golang.org/grpc?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)
+```
+
+To build Go code, there are several options:
+
+- Set up a VPN and access google.golang.org through that.
+
+- Without Go module support: `git clone` the repo manually:
+
+  ```sh
+  git clone https://github.com/grpc/grpc-go.git $GOPATH/src/google.golang.org/grpc
+  ```
+
+  You will need to do the same for all of grpc's dependencies in `golang.org`,
+  e.g. `golang.org/x/net`.
+
+- With Go module support: it is possible to use the `replace` feature of `go
+  mod` to create aliases for golang.org packages.  In your project's directory:
+
+  ```sh
+  go mod edit -replace=google.golang.org/grpc=github.com/grpc/grpc-go@latest
+  go mod tidy
+  go mod vendor
+  go build -mod=vendor
+  ```
+
+  Again, this will need to be done for all transitive dependencies hosted on
+  golang.org as well. For details, refer to [golang/go issue #28652](https://github.com/golang/go/issues/28652).
+
+### Compiling error, undefined: grpc.SupportPackageIsVersion
+
+#### If you are using Go modules:
+
+Ensure your gRPC-Go version is `require`d at the appropriate version in
+the same module containing the generated `.pb.go` files.  For example,
+`SupportPackageIsVersion6` needs `v1.27.0`, so in your `go.mod` file:
+
+```go
+module <your module name>
+
+require (
+    google.golang.org/grpc v1.27.0
+)
+```
+
+#### If you are *not* using Go modules:
+
+Update the `proto` package, gRPC package, and rebuild the `.proto` files:
+
+```sh
+go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
+go get -u google.golang.org/grpc
+protoc --go_out=plugins=grpc:. *.proto
+```
+
+### How to turn on logging
+
+The default logger is controlled by environment variables. Turn everything on
+like this:
+
+```console
+$ export GRPC_GO_LOG_VERBOSITY_LEVEL=99
+$ export GRPC_GO_LOG_SEVERITY_LEVEL=info
+```
+
+### The RPC failed with error `"code = Unavailable desc = transport is closing"`
+
+This error means the connection the RPC is using was closed, and there are many
+possible reasons, including:
+ 1. mis-configured transport credentials, connection failed on handshaking
+ 1. bytes disrupted, possibly by a proxy in between
+ 1. server shutdown
+ 1. Keepalive parameters caused connection shutdown, for example if you have configured
+    your server to terminate connections regularly to [trigger DNS lookups](https://github.com/grpc/grpc-go/issues/3170#issuecomment-552517779).
+    If this is the case, you may want to increase your [MaxConnectionAgeGrace](https://pkg.go.dev/google.golang.org/grpc/keepalive?tab=doc#ServerParameters),
+    to allow longer RPC calls to finish.
+
+It can be tricky to debug this because the error happens on the client side but
+the root cause of the connection being closed is on the server side. Turn on
+logging on __both client and server__, and see if there are any transport
+errors.
+
+[API]: https://pkg.go.dev/google.golang.org/grpc
+[Go]: https://golang.org
+[Go module]: https://github.com/golang/go/wiki/Modules
+[gRPC]: https://grpc.io
+[Go gRPC docs]: https://grpc.io/docs/languages/go
+[Performance benchmark]: https://performance-dot-grpc-testing.appspot.com/explore?dashboard=5180705743044608
+[quick start]: https://grpc.io/docs/languages/go/quickstart
+[go-releases]: https://golang.org/doc/devel/release.html

vendor/google.golang.org/grpc/SECURITY.md

@@ -0,0 +1,3 @@
+# Security Policy
+
+For information on gRPC Security Policy and reporting potentional security issues, please see [gRPC CVE Process](https://github.com/grpc/proposal/blob/master/P4-grpc-cve-process.md).

vendor/google.golang.org/grpc/attributes/attributes.go

@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package attributes defines a generic key/value store used in various gRPC
+// components.
+//
+// Experimental
+//
+// Notice: This package is EXPERIMENTAL and may be changed or removed in a
+// later release.
+package attributes
+
+import "fmt"
+
+// Attributes is an immutable struct for storing and retrieving generic
+// key/value pairs.  Keys must be hashable, and users should define their own
+// types for keys.
+type Attributes struct {
+	m map[interface{}]interface{}
+}
+
+// New returns a new Attributes containing all key/value pairs in kvs.  If the
+// same key appears multiple times, the last value overwrites all previous
+// values for that key.  Panics if len(kvs) is not even.
+func New(kvs ...interface{}) *Attributes {
+	if len(kvs)%2 != 0 {
+		panic(fmt.Sprintf("attributes.New called with unexpected input: len(kvs) = %v", len(kvs)))
+	}
+	a := &Attributes{m: make(map[interface{}]interface{}, len(kvs)/2)}
+	for i := 0; i < len(kvs)/2; i++ {
+		a.m[kvs[i*2]] = kvs[i*2+1]
+	}
+	return a
+}
+
+// WithValues returns a new Attributes containing all key/value pairs in a and
+// kvs.  Panics if len(kvs) is not even.  If the same key appears multiple
+// times, the last value overwrites all previous values for that key.  To
+// remove an existing key, use a nil value.
+func (a *Attributes) WithValues(kvs ...interface{}) *Attributes {
+	if a == nil {
+		return New(kvs...)
+	}
+	if len(kvs)%2 != 0 {
+		panic(fmt.Sprintf("attributes.New called with unexpected input: len(kvs) = %v", len(kvs)))
+	}
+	n := &Attributes{m: make(map[interface{}]interface{}, len(a.m)+len(kvs)/2)}
+	for k, v := range a.m {
+		n.m[k] = v
+	}
+	for i := 0; i < len(kvs)/2; i++ {
+		n.m[kvs[i*2]] = kvs[i*2+1]
+	}
+	return n
+}
+
+// Value returns the value associated with these attributes for key, or nil if
+// no value is associated with key.
+func (a *Attributes) Value(key interface{}) interface{} {
+	if a == nil {
+		return nil
+	}
+	return a.m[key]
+}

vendor/google.golang.org/grpc/backoff.go

@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// See internal/backoff package for the backoff implementation. This file is
+// kept for the exported types and API backward compatibility.
+
+package grpc
+
+import (
+	"time"
+
+	"google.golang.org/grpc/backoff"
+)
+
+// DefaultBackoffConfig uses values specified for backoff in
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+//
+// Deprecated: use ConnectParams instead. Will be supported throughout 1.x.
+var DefaultBackoffConfig = BackoffConfig{
+	MaxDelay: 120 * time.Second,
+}
+
+// BackoffConfig defines the parameters for the default gRPC backoff strategy.
+//
+// Deprecated: use ConnectParams instead. Will be supported throughout 1.x.
+type BackoffConfig struct {
+	// MaxDelay is the upper bound of backoff delay.
+	MaxDelay time.Duration
+}
+
+// ConnectParams defines the parameters for connecting and retrying. Users are
+// encouraged to use this instead of the BackoffConfig type defined above. See
+// here for more details:
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+//
+// Experimental
+//
+// Notice: This type is EXPERIMENTAL and may be changed or removed in a
+// later release.
+type ConnectParams struct {
+	// Backoff specifies the configuration options for connection backoff.
+	Backoff backoff.Config
+	// MinConnectTimeout is the minimum amount of time we are willing to give a
+	// connection to complete.
+	MinConnectTimeout time.Duration
+}

vendor/google.golang.org/grpc/backoff/backoff.go

@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package backoff provides configuration options for backoff.
+//
+// More details can be found at:
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+//
+// All APIs in this package are experimental.
+package backoff
+
+import "time"
+
+// Config defines the configuration options for backoff.
+type Config struct {
+	// BaseDelay is the amount of time to backoff after the first failure.
+	BaseDelay time.Duration
+	// Multiplier is the factor with which to multiply backoffs after a
+	// failed retry. Should ideally be greater than 1.
+	Multiplier float64
+	// Jitter is the factor with which backoffs are randomized.
+	Jitter float64
+	// MaxDelay is the upper bound of backoff delay.
+	MaxDelay time.Duration
+}
+
+// DefaultConfig is a backoff configuration with the default values specfied
+// at https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+//
+// This should be useful for callers who want to configure backoff with
+// non-default values only for a subset of the options.
+var DefaultConfig = Config{
+	BaseDelay:  1.0 * time.Second,
+	Multiplier: 1.6,
+	Jitter:     0.2,
+	MaxDelay:   120 * time.Second,
+}

vendor/google.golang.org/grpc/balancer/balancer.go

@@ -0,0 +1,388 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package balancer defines APIs for load balancing in gRPC.
+// All APIs in this package are experimental.
+package balancer
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net"
+	"strings"
+
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/resolver"
+	"google.golang.org/grpc/serviceconfig"
+)
+
+var (
+	// m is a map from name to balancer builder.
+	m = make(map[string]Builder)
+)
+
+// Register registers the balancer builder to the balancer map. b.Name
+// (lowercased) will be used as the name registered with this builder.  If the
+// Builder implements ConfigParser, ParseConfig will be called when new service
+// configs are received by the resolver, and the result will be provided to the
+// Balancer in UpdateClientConnState.
+//
+// NOTE: this function must only be called during initialization time (i.e. in
+// an init() function), and is not thread-safe. If multiple Balancers are
+// registered with the same name, the one registered last will take effect.
+func Register(b Builder) {
+	m[strings.ToLower(b.Name())] = b
+}
+
+// unregisterForTesting deletes the balancer with the given name from the
+// balancer map.
+//
+// This function is not thread-safe.
+func unregisterForTesting(name string) {
+	delete(m, name)
+}
+
+func init() {
+	internal.BalancerUnregister = unregisterForTesting
+}
+
+// Get returns the resolver builder registered with the given name.
+// Note that the compare is done in a case-insensitive fashion.
+// If no builder is register with the name, nil will be returned.
+func Get(name string) Builder {
+	if b, ok := m[strings.ToLower(name)]; ok {
+		return b
+	}
+	return nil
+}
+
+// SubConn represents a gRPC sub connection.
+// Each sub connection contains a list of addresses. gRPC will
+// try to connect to them (in sequence), and stop trying the
+// remainder once one connection is successful.
+//
+// The reconnect backoff will be applied on the list, not a single address.
+// For example, try_on_all_addresses -> backoff -> try_on_all_addresses.
+//
+// All SubConns start in IDLE, and will not try to connect. To trigger
+// the connecting, Balancers must call Connect.
+// When the connection encounters an error, it will reconnect immediately.
+// When the connection becomes IDLE, it will not reconnect unless Connect is
+// called.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
+type SubConn interface {
+	// UpdateAddresses updates the addresses used in this SubConn.
+	// gRPC checks if currently-connected address is still in the new list.
+	// If it's in the list, the connection will be kept.
+	// If it's not in the list, the connection will gracefully closed, and
+	// a new connection will be created.
+	//
+	// This will trigger a state transition for the SubConn.
+	//
+	// Deprecated: This method is now part of the ClientConn interface and will
+	// eventually be removed from here.
+	UpdateAddresses([]resolver.Address)
+	// Connect starts the connecting for this SubConn.
+	Connect()
+}
+
+// NewSubConnOptions contains options to create new SubConn.
+type NewSubConnOptions struct {
+	// CredsBundle is the credentials bundle that will be used in the created
+	// SubConn. If it's nil, the original creds from grpc DialOptions will be
+	// used.
+	//
+	// Deprecated: Use the Attributes field in resolver.Address to pass
+	// arbitrary data to the credential handshaker.
+	CredsBundle credentials.Bundle
+	// HealthCheckEnabled indicates whether health check service should be
+	// enabled on this SubConn
+	HealthCheckEnabled bool
+}
+
+// State contains the balancer's state relevant to the gRPC ClientConn.
+type State struct {
+	// State contains the connectivity state of the balancer, which is used to
+	// determine the state of the ClientConn.
+	ConnectivityState connectivity.State
+	// Picker is used to choose connections (SubConns) for RPCs.
+	Picker Picker
+}
+
+// ClientConn represents a gRPC ClientConn.
+//
+// This interface is to be implemented by gRPC. Users should not need a
+// brand new implementation of this interface. For the situations like
+// testing, the new implementation should embed this interface. This allows
+// gRPC to add new methods to this interface.
+type ClientConn interface {
+	// NewSubConn is called by balancer to create a new SubConn.
+	// It doesn't block and wait for the connections to be established.
+	// Behaviors of the SubConn can be controlled by options.
+	NewSubConn([]resolver.Address, NewSubConnOptions) (SubConn, error)
+	// RemoveSubConn removes the SubConn from ClientConn.
+	// The SubConn will be shutdown.
+	RemoveSubConn(SubConn)
+	// UpdateAddresses updates the addresses used in the passed in SubConn.
+	// gRPC checks if the currently connected address is still in the new list.
+	// If so, the connection will be kept. Else, the connection will be
+	// gracefully closed, and a new connection will be created.
+	//
+	// This will trigger a state transition for the SubConn.
+	UpdateAddresses(SubConn, []resolver.Address)
+
+	// UpdateState notifies gRPC that the balancer's internal state has
+	// changed.
+	//
+	// gRPC will update the connectivity state of the ClientConn, and will call
+	// Pick on the new Picker to pick new SubConns.
+	UpdateState(State)
+
+	// ResolveNow is called by balancer to notify gRPC to do a name resolving.
+	ResolveNow(resolver.ResolveNowOptions)
+
+	// Target returns the dial target for this ClientConn.
+	//
+	// Deprecated: Use the Target field in the BuildOptions instead.
+	Target() string
+}
+
+// BuildOptions contains additional information for Build.
+type BuildOptions struct {
+	// DialCreds is the transport credential the Balancer implementation can
+	// use to dial to a remote load balancer server. The Balancer implementations
+	// can ignore this if it does not need to talk to another party securely.
+	DialCreds credentials.TransportCredentials
+	// CredsBundle is the credentials bundle that the Balancer can use.
+	CredsBundle credentials.Bundle
+	// Dialer is the custom dialer the Balancer implementation can use to dial
+	// to a remote load balancer server. The Balancer implementations
+	// can ignore this if it doesn't need to talk to remote balancer.
+	Dialer func(context.Context, string) (net.Conn, error)
+	// ChannelzParentID is the entity parent's channelz unique identification number.
+	ChannelzParentID int64
+	// CustomUserAgent is the custom user agent set on the parent ClientConn.
+	// The balancer should set the same custom user agent if it creates a
+	// ClientConn.
+	CustomUserAgent string
+	// Target contains the parsed address info of the dial target. It is the same resolver.Target as
+	// passed to the resolver.
+	// See the documentation for the resolver.Target type for details about what it contains.
+	Target resolver.Target
+}
+
+// Builder creates a balancer.
+type Builder interface {
+	// Build creates a new balancer with the ClientConn.
+	Build(cc ClientConn, opts BuildOptions) Balancer
+	// Name returns the name of balancers built by this builder.
+	// It will be used to pick balancers (for example in service config).
+	Name() string
+}
+
+// ConfigParser parses load balancer configs.
+type ConfigParser interface {
+	// ParseConfig parses the JSON load balancer config provided into an
+	// internal form or returns an error if the config is invalid.  For future
+	// compatibility reasons, unknown fields in the config should be ignored.
+	ParseConfig(LoadBalancingConfigJSON json.RawMessage) (serviceconfig.LoadBalancingConfig, error)
+}
+
+// PickInfo contains additional information for the Pick operation.
+type PickInfo struct {
+	// FullMethodName is the method name that NewClientStream() is called
+	// with. The canonical format is /service/Method.
+	FullMethodName string
+	// Ctx is the RPC's context, and may contain relevant RPC-level information
+	// like the outgoing header metadata.
+	Ctx context.Context
+}
+
+// DoneInfo contains additional information for done.
+type DoneInfo struct {
+	// Err is the rpc error the RPC finished with. It could be nil.
+	Err error
+	// Trailer contains the metadata from the RPC's trailer, if present.
+	Trailer metadata.MD
+	// BytesSent indicates if any bytes have been sent to the server.
+	BytesSent bool
+	// BytesReceived indicates if any byte has been received from the server.
+	BytesReceived bool
+	// ServerLoad is the load received from server. It's usually sent as part of
+	// trailing metadata.
+	//
+	// The only supported type now is *orca_v1.LoadReport.
+	ServerLoad interface{}
+}
+
+var (
+	// ErrNoSubConnAvailable indicates no SubConn is available for pick().
+	// gRPC will block the RPC until a new picker is available via UpdateState().
+	ErrNoSubConnAvailable = errors.New("no SubConn is available")
+	// ErrTransientFailure indicates all SubConns are in TransientFailure.
+	// WaitForReady RPCs will block, non-WaitForReady RPCs will fail.
+	//
+	// Deprecated: return an appropriate error based on the last resolution or
+	// connection attempt instead.  The behavior is the same for any non-gRPC
+	// status error.
+	ErrTransientFailure = errors.New("all SubConns are in TransientFailure")
+)
+
+// PickResult contains information related to a connection chosen for an RPC.
+type PickResult struct {
+	// SubConn is the connection to use for this pick, if its state is Ready.
+	// If the state is not Ready, gRPC will block the RPC until a new Picker is
+	// provided by the balancer (using ClientConn.UpdateState).  The SubConn
+	// must be one returned by ClientConn.NewSubConn.
+	SubConn SubConn
+
+	// Done is called when the RPC is completed.  If the SubConn is not ready,
+	// this will be called with a nil parameter.  If the SubConn is not a valid
+	// type, Done may not be called.  May be nil if the balancer does not wish
+	// to be notified when the RPC completes.
+	Done func(DoneInfo)
+}
+
+// TransientFailureError returns e.  It exists for backward compatibility and
+// will be deleted soon.
+//
+// Deprecated: no longer necessary, picker errors are treated this way by
+// default.
+func TransientFailureError(e error) error { return e }
+
+// Picker is used by gRPC to pick a SubConn to send an RPC.
+// Balancer is expected to generate a new picker from its snapshot every time its
+// internal state has changed.
+//
+// The pickers used by gRPC can be updated by ClientConn.UpdateState().
+type Picker interface {
+	// Pick returns the connection to use for this RPC and related information.
+	//
+	// Pick should not block.  If the balancer needs to do I/O or any blocking
+	// or time-consuming work to service this call, it should return
+	// ErrNoSubConnAvailable, and the Pick call will be repeated by gRPC when
+	// the Picker is updated (using ClientConn.UpdateState).
+	//
+	// If an error is returned:
+	//
+	// - If the error is ErrNoSubConnAvailable, gRPC will block until a new
+	//   Picker is provided by the balancer (using ClientConn.UpdateState).
+	//
+	// - If the error is a status error (implemented by the grpc/status
+	//   package), gRPC will terminate the RPC with the code and message
+	//   provided.
+	//
+	// - For all other errors, wait for ready RPCs will wait, but non-wait for
+	//   ready RPCs will be terminated with this error's Error() string and
+	//   status code Unavailable.
+	Pick(info PickInfo) (PickResult, error)
+}
+
+// Balancer takes input from gRPC, manages SubConns, and collects and aggregates
+// the connectivity states.
+//
+// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs.
+//
+// UpdateClientConnState, ResolverError, UpdateSubConnState, and Close are
+// guaranteed to be called synchronously from the same goroutine.  There's no
+// guarantee on picker.Pick, it may be called anytime.
+type Balancer interface {
+	// UpdateClientConnState is called by gRPC when the state of the ClientConn
+	// changes.  If the error returned is ErrBadResolverState, the ClientConn
+	// will begin calling ResolveNow on the active name resolver with
+	// exponential backoff until a subsequent call to UpdateClientConnState
+	// returns a nil error.  Any other errors are currently ignored.
+	UpdateClientConnState(ClientConnState) error
+	// ResolverError is called by gRPC when the name resolver reports an error.
+	ResolverError(error)
+	// UpdateSubConnState is called by gRPC when the state of a SubConn
+	// changes.
+	UpdateSubConnState(SubConn, SubConnState)
+	// Close closes the balancer. The balancer is not required to call
+	// ClientConn.RemoveSubConn for its existing SubConns.
+	Close()
+}
+
+// SubConnState describes the state of a SubConn.
+type SubConnState struct {
+	// ConnectivityState is the connectivity state of the SubConn.
+	ConnectivityState connectivity.State
+	// ConnectionError is set if the ConnectivityState is TransientFailure,
+	// describing the reason the SubConn failed.  Otherwise, it is nil.
+	ConnectionError error
+}
+
+// ClientConnState describes the state of a ClientConn relevant to the
+// balancer.
+type ClientConnState struct {
+	ResolverState resolver.State
+	// The parsed load balancing configuration returned by the builder's
+	// ParseConfig method, if implemented.
+	BalancerConfig serviceconfig.LoadBalancingConfig
+}
+
+// ErrBadResolverState may be returned by UpdateClientConnState to indicate a
+// problem with the provided name resolver data.
+var ErrBadResolverState = errors.New("bad resolver state")
+
+// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns
+// and returns one aggregated connectivity state.
+//
+// It's not thread safe.
+type ConnectivityStateEvaluator struct {
+	numReady      uint64 // Number of addrConns in ready state.
+	numConnecting uint64 // Number of addrConns in connecting state.
+}
+
+// RecordTransition records state change happening in subConn and based on that
+// it evaluates what aggregated state should be.
+//
+//  - If at least one SubConn in Ready, the aggregated state is Ready;
+//  - Else if at least one SubConn in Connecting, the aggregated state is Connecting;
+//  - Else the aggregated state is TransientFailure.
+//
+// Idle and Shutdown are not considered.
+func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State {
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		return connectivity.Ready
+	}
+	if cse.numConnecting > 0 {
+		return connectivity.Connecting
+	}
+	return connectivity.TransientFailure
+}

vendor/google.golang.org/grpc/balancer/base/balancer.go

@@ -0,0 +1,270 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package base
+
+import (
+	"errors"
+	"fmt"
+
+	"google.golang.org/grpc/attributes"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/resolver"
+)
+
+var logger = grpclog.Component("balancer")
+
+type baseBuilder struct {
+	name          string
+	pickerBuilder PickerBuilder
+	config        Config
+}
+
+func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
+	bal := &baseBalancer{
+		cc:            cc,
+		pickerBuilder: bb.pickerBuilder,
+
+		subConns: make(map[resolver.Address]subConnInfo),
+		scStates: make(map[balancer.SubConn]connectivity.State),
+		csEvltr:  &balancer.ConnectivityStateEvaluator{},
+		config:   bb.config,
+	}
+	// Initialize picker to a picker that always returns
+	// ErrNoSubConnAvailable, because when state of a SubConn changes, we
+	// may call UpdateState with this picker.
+	bal.picker = NewErrPicker(balancer.ErrNoSubConnAvailable)
+	return bal
+}
+
+func (bb *baseBuilder) Name() string {
+	return bb.name
+}
+
+type subConnInfo struct {
+	subConn balancer.SubConn
+	attrs   *attributes.Attributes
+}
+
+type baseBalancer struct {
+	cc            balancer.ClientConn
+	pickerBuilder PickerBuilder
+
+	csEvltr *balancer.ConnectivityStateEvaluator
+	state   connectivity.State
+
+	subConns map[resolver.Address]subConnInfo // `attributes` is stripped from the keys of this map (the addresses)
+	scStates map[balancer.SubConn]connectivity.State
+	picker   balancer.Picker
+	config   Config
+
+	resolverErr error // the last error reported by the resolver; cleared on successful resolution
+	connErr     error // the last connection error; cleared upon leaving TransientFailure
+}
+
+func (b *baseBalancer) ResolverError(err error) {
+	b.resolverErr = err
+	if len(b.subConns) == 0 {
+		b.state = connectivity.TransientFailure
+	}
+
+	if b.state != connectivity.TransientFailure {
+		// The picker will not change since the balancer does not currently
+		// report an error.
+		return
+	}
+	b.regeneratePicker()
+	b.cc.UpdateState(balancer.State{
+		ConnectivityState: b.state,
+		Picker:            b.picker,
+	})
+}
+
+func (b *baseBalancer) UpdateClientConnState(s balancer.ClientConnState) error {
+	// TODO: handle s.ResolverState.ServiceConfig?
+	if logger.V(2) {
+		logger.Info("base.baseBalancer: got new ClientConn state: ", s)
+	}
+	// Successful resolution; clear resolver error and ensure we return nil.
+	b.resolverErr = nil
+	// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
+	addrsSet := make(map[resolver.Address]struct{})
+	for _, a := range s.ResolverState.Addresses {
+		// Strip attributes from addresses before using them as map keys. So
+		// that when two addresses only differ in attributes pointers (but with
+		// the same attribute content), they are considered the same address.
+		//
+		// Note that this doesn't handle the case where the attribute content is
+		// different. So if users want to set different attributes to create
+		// duplicate connections to the same backend, it doesn't work. This is
+		// fine for now, because duplicate is done by setting Metadata today.
+		//
+		// TODO: read attributes to handle duplicate connections.
+		aNoAttrs := a
+		aNoAttrs.Attributes = nil
+		addrsSet[aNoAttrs] = struct{}{}
+		if scInfo, ok := b.subConns[aNoAttrs]; !ok {
+			// a is a new address (not existing in b.subConns).
+			//
+			// When creating SubConn, the original address with attributes is
+			// passed through. So that connection configurations in attributes
+			// (like creds) will be used.
+			sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{HealthCheckEnabled: b.config.HealthCheck})
+			if err != nil {
+				logger.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
+				continue
+			}
+			b.subConns[aNoAttrs] = subConnInfo{subConn: sc, attrs: a.Attributes}
+			b.scStates[sc] = connectivity.Idle
+			sc.Connect()
+		} else {
+			// Always update the subconn's address in case the attributes
+			// changed.
+			//
+			// The SubConn does a reflect.DeepEqual of the new and old
+			// addresses. So this is a noop if the current address is the same
+			// as the old one (including attributes).
+			scInfo.attrs = a.Attributes
+			b.subConns[aNoAttrs] = scInfo
+			b.cc.UpdateAddresses(scInfo.subConn, []resolver.Address{a})
+		}
+	}
+	for a, scInfo := range b.subConns {
+		// a was removed by resolver.
+		if _, ok := addrsSet[a]; !ok {
+			b.cc.RemoveSubConn(scInfo.subConn)
+			delete(b.subConns, a)
+			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
+			// The entry will be deleted in UpdateSubConnState.
+		}
+	}
+	// If resolver state contains no addresses, return an error so ClientConn
+	// will trigger re-resolve. Also records this as an resolver error, so when
+	// the overall state turns transient failure, the error message will have
+	// the zero address information.
+	if len(s.ResolverState.Addresses) == 0 {
+		b.ResolverError(errors.New("produced zero addresses"))
+		return balancer.ErrBadResolverState
+	}
+	return nil
+}
+
+// mergeErrors builds an error from the last connection error and the last
+// resolver error.  Must only be called if b.state is TransientFailure.
+func (b *baseBalancer) mergeErrors() error {
+	// connErr must always be non-nil unless there are no SubConns, in which
+	// case resolverErr must be non-nil.
+	if b.connErr == nil {
+		return fmt.Errorf("last resolver error: %v", b.resolverErr)
+	}
+	if b.resolverErr == nil {
+		return fmt.Errorf("last connection error: %v", b.connErr)
+	}
+	return fmt.Errorf("last connection error: %v; last resolver error: %v", b.connErr, b.resolverErr)
+}
+
+// regeneratePicker takes a snapshot of the balancer, and generates a picker
+// from it. The picker is
+//  - errPicker if the balancer is in TransientFailure,
+//  - built by the pickerBuilder with all READY SubConns otherwise.
+func (b *baseBalancer) regeneratePicker() {
+	if b.state == connectivity.TransientFailure {
+		b.picker = NewErrPicker(b.mergeErrors())
+		return
+	}
+	readySCs := make(map[balancer.SubConn]SubConnInfo)
+
+	// Filter out all ready SCs from full subConn map.
+	for addr, scInfo := range b.subConns {
+		if st, ok := b.scStates[scInfo.subConn]; ok && st == connectivity.Ready {
+			addr.Attributes = scInfo.attrs
+			readySCs[scInfo.subConn] = SubConnInfo{Address: addr}
+		}
+	}
+	b.picker = b.pickerBuilder.Build(PickerBuildInfo{ReadySCs: readySCs})
+}
+
+func (b *baseBalancer) UpdateSubConnState(sc balancer.SubConn, state balancer.SubConnState) {
+	s := state.ConnectivityState
+	if logger.V(2) {
+		logger.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
+	}
+	oldS, ok := b.scStates[sc]
+	if !ok {
+		if logger.V(2) {
+			logger.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
+		}
+		return
+	}
+	if oldS == connectivity.TransientFailure && s == connectivity.Connecting {
+		// Once a subconn enters TRANSIENT_FAILURE, ignore subsequent
+		// CONNECTING transitions to prevent the aggregated state from being
+		// always CONNECTING when many backends exist but are all down.
+		return
+	}
+	b.scStates[sc] = s
+	switch s {
+	case connectivity.Idle:
+		sc.Connect()
+	case connectivity.Shutdown:
+		// When an address was removed by resolver, b called RemoveSubConn but
+		// kept the sc's state in scStates. Remove state for this sc here.
+		delete(b.scStates, sc)
+	case connectivity.TransientFailure:
+		// Save error to be reported via picker.
+		b.connErr = state.ConnectionError
+	}
+
+	b.state = b.csEvltr.RecordTransition(oldS, s)
+
+	// Regenerate picker when one of the following happens:
+	//  - this sc entered or left ready
+	//  - the aggregated state of balancer is TransientFailure
+	//    (may need to update error message)
+	if (s == connectivity.Ready) != (oldS == connectivity.Ready) ||
+		b.state == connectivity.TransientFailure {
+		b.regeneratePicker()
+	}
+
+	b.cc.UpdateState(balancer.State{ConnectivityState: b.state, Picker: b.picker})
+}
+
+// Close is a nop because base balancer doesn't have internal state to clean up,
+// and it doesn't need to call RemoveSubConn for the SubConns.
+func (b *baseBalancer) Close() {
+}
+
+// NewErrPicker returns a Picker that always returns err on Pick().
+func NewErrPicker(err error) balancer.Picker {
+	return &errPicker{err: err}
+}
+
+// NewErrPickerV2 is temporarily defined for backward compatibility reasons.
+//
+// Deprecated: use NewErrPicker instead.
+var NewErrPickerV2 = NewErrPicker
+
+type errPicker struct {
+	err error // Pick() always returns this err.
+}
+
+func (p *errPicker) Pick(info balancer.PickInfo) (balancer.PickResult, error) {
+	return balancer.PickResult{}, p.err
+}