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google: Re-enable AppEngineTokenSource to be used from Managed VMs.

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Fixes #152.

Change-Id: I757c011d3ac5dca8f80fb2119eda3adf8c178ca6
Reviewed-on: https://go-review.googlesource.com/14622
Reviewed-by: Andrew Gerrand <adg@golang.org>
This commit is contained in:
Chris Broadfoot
2015-09-15 17:49:47 -07:00
parent ad0128250e
commit 52dcf34690
3 changed files with 20 additions and 2 deletions
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5
google/default.go
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@@ -50,7 +50,8 @@ func DefaultClient(ctx context.Context, scope ...string) (*http.Client, error) {
// On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
// On other systems, $HOME/.config/gcloud/application_default_credentials.json.
// 3. On Google App Engine it uses the appengine.AccessToken function.
// 4. On Google Compute Engine, it fetches credentials from the metadata server.
// 4. On Google Compute Engine and Google App Engine Managed VMs, it fetches
// credentials from the metadata server.
// (In this final case any provided scopes are ignored.)
//
// For more details, see:
@@ -84,7 +85,7 @@ func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSourc
}
// Third, if we're on Google App Engine use those credentials.
if appengineTokenFunc != nil {
if appengineTokenFunc != nil && !appengineVM {
return AppEngineTokenSource(ctx, scope...), nil
}