How do I download a specific service's source code off of AppEngine?

Question

I have some php source code working in an app engine production environment that won't work anywhere else. Old versions of that code don't seem to work at all either so I need to get that source and see what the heck it is doing differently.

This discussion outlines the challenges I'm having: http://google-app-engine.75637.x6.nabble.com/Download-specific-Module-code-td699.html

I was told to try using appcfg.py download_app:

appcfg.py download_app -A <APP_NAME> -V <Version> <DIR>

The problem is that this command does not allow me to specify module / service so I can't target my source code. Also I'm not the App owner so I can't download everything but from what I understand that still wouldn't work because appcfg only seems to target the default service.

The article I linked ends with a suggestion to use gcloud to download the app but I haven't been able to find how to do that. Does anyone here know how to resolve this? The service is running in a Flexible instance - not sure if that makes a difference...

Answer 1

From appcfg.py download_app --help:

Usage: appcfg.py [options] download_app -A app_id [ -V version ]

...

-M MODULE, --module=MODULE Set the module, overriding the module value from app.yaml. ...

This invocation allowed me to download the code for the non-default python module of :

appcfg.py --module=<my_module> download_app -A <my_app> .

Of course, you need to meet authentication and ownership requirements, etc. And your app shouldn't have been configured for prevention of source code downloads (ireversible config)

Answer 2

Solution:

appcfg.py -A [YOUR_PROJECT_ID] --module=[YOUR_PROJECT_MODULE] download_app [SAVE_FOLDER]

Example:

appcfg.py -A foo-project --module=01-01.foo-project.appspot.com download_app foo-project-v0101

Answer 3

Simple enough to do:

1. Switch to the directory where App Engine is installed on your computer. It is usually under the following path:

   C:\Program Files\Google\google_appengine

2. Run the below command

   appcfg.py download_app –A MyAppName -V 1 c:\AppEngine\SourceCode