As of 04/22/15, update of gcloud to the latest version breaks the deploy command. The version of the app is set to the current timestamp (eg: 20150422t202108). And doing a:
gcloud preview app deploy .
returns an error
"ERROR: Directories are not supported [.]. You must provide explicit yaml files."
And deploying the application using individual .yaml files complains about the version specified in the module as the update set the app version to the timestamp.
"The version [1] declared in [/Users/username/app.yaml, /Users/username/app2.yaml] does not match the current gcloud version [20150422t202108]."
Is this a bug or did the config options change? I don't find any differences on the documentation page.