whoops, the above statement is true if you have different machines for every branch... reading more carefully it seems that you have n instances on the same machine.
If so, are you running a single web2py instance with an application for every branch or multiple web2py running a single app for every branch (i.e. 1 web2py, 12 similar folders in the applications directory versus 12 folders of web2py, only one folder into the applications directory) ? A small bash script will allow the flexibility required to indicate a "master" to copy around in both cases. --
