How to download source code from google app engine standard (appcfg.py is deprecated)

Question

How to download source code from google app engine standard when the appcfg.py is deprecated by the google.

Answer 1

The gcloud SDK doesn't (yet) have an equivalent capability. From Migrating to Cloud SDK:

As a result of the deprecation of the appcfg tool and the standalone App Engine SDK, the following features are currently not supported in Cloud SDK:

• Downloads of your application's source code with AppCfg.

However, despite being deprecated, the GAE SDK remains so far functional, so you can still use its appcfg.py download capability, at least until its announced shutdown date - July 30, 2020 (see also Feature Deprecations). Hopefully by that time there will be an equivalent gcloud functionality.

Separately from straight downloading the app code it may be possible (but more tedious) to view the files and restore them them by copy-pasting their content, see Google Cloud DataStore automatic indexing.