Copyright 2014 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 google

import (
	
	

	
)
Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error)
Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineAppIDFunc func(c context.Context) string
AppEngineTokenSource returns a token source that fetches tokens from either the current application's service account or from the metadata server, depending on the App Engine environment. See below for environment-specific details. If you are implementing a 3-legged OAuth 2.0 flow on App Engine that involves user accounts, see oauth2.Config instead. First generation App Engine runtimes (<= Go 1.9): AppEngineTokenSource returns a token source that fetches tokens issued to the current App Engine application's service account. The provided context must have come from appengine.NewContext. Second generation App Engine runtimes (>= Go 1.11) and App Engine flexible: AppEngineTokenSource is DEPRECATED on second generation runtimes and on the flexible environment. It delegates to ComputeTokenSource, and the provided context and scopes are not used. Please use DefaultTokenSource (or ComputeTokenSource, which DefaultTokenSource will use in this case) instead.
func ( context.Context,  ...string) oauth2.TokenSource {
	return appEngineTokenSource(, ...)