Separate env.php files for Google App Engine?

Question

I was wondering if anyone has figured out how to have a production env.php and a development env.php. Since Deploying your app just takes whatever code is in the directory you specify and throws it into a version, I can't figure out how this is possible.

I would have to copy my production env.php file over my local one every time I wanted to deploy something.

If there is someway that I can use the Source Code on the cloud as the production code, that would be helpful. I know how to ignore an env.php file through git. I don't see a way to do this, however, which really makes no sense to me. Why have the source code on there if you can't use it in production?

Answer 1

There is a way.

The appcfg.py command allows to to override environment variables at deploy time.

-- update with open source tool to manage environments --

We've written a deployment tool to automatically build the deploy command with live environment variable overrides.

And we've open-sourced it today!

https://github.com/Venditan/appengine-deploy

-- update with example --

Suppose we have these environment variables defined in our app.yaml file:

env_variables:
  DB_HOST: localhost
  DB_USER: marty

This works great for local development.

But then, when we deploy to live, we want them to be different:

appcfg.py update app.yaml -E DB_HOST:"1.2.3.4" -E DB_USER:"emmett"

tada!