fix(git): add vendor in .gitignore

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

@@ -1,128 +0,0 @@
-// 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
-}