added GOOGLE_OAUTH2_ACCESS_TOKEN to filestate loging for gcloud bucke…

…t storage

pkg/authhelpers/gcpauth.go

@@ -7,6 +7,7 @@ import (
 	"os"
 
 	"cloud.google.com/go/storage"
+	"golang.org/x/oauth2"
 	"golang.org/x/oauth2/google"
 
 	"gocloud.dev/blob/gcsblob"
@@ -32,13 +33,23 @@ func ResolveGoogleCredentials(ctx context.Context, scope string) (*google.Creden
 	if creds := os.Getenv("GOOGLE_CREDENTIALS"); creds != "" {
 		// We try $GOOGLE_CREDENTIALS before gcp.DefaultCredentials
 		// so that users can override the default creds
+
 		credentials, err := google.CredentialsFromJSON(ctx, []byte(creds), scope)
 		if err != nil {
 			return nil, fmt.Errorf("unable to parse credentials from $GOOGLE_CREDENTIALS: %w", err)
 		}
 		return credentials, nil
 	}
 
+	if creds := os.Getenv("GOOGLE_OAUTH_ACCESS_TOKEN"); creds != "" {
+		// We try $GOOGLE_OAUTH_ACCESS_TOKEN before gcp.DefaultCredentials
+		// so that users can override the default creds
+
+		return &google.Credentials{
+			TokenSource: oauth2.StaticTokenSource(&oauth2.Token{AccessToken: creds}),
+		}, nil
+	}
+
 	// DefaultCredentials will attempt to load creds in the following order:
 	// 1. a file located at $GOOGLE_APPLICATION_CREDENTIALS
 	// 2. application_default_credentials.json file in ~/.config/gcloud or $APPDATA\gcloud