I've tried a few different strategies and found this method works best for me. In my fabfile I have environment 'setters' that precede regular commands. So I

I've tried a few different strategies and found this method works best for me. In my fabfile I have environment 'setters' that precede regular commands. So I can do 'fab qa deploy' or 'fab prod deploy' and the deploy command grabs the correct settings_local file for the target environment.