how to write a project-aware post commit hook for trac?

[Nagy Viktor - Vikti - Bika]

hi,

I would like to have a single post commit hook for all my trac-s
I've seen: http://doc.bazaar.canonical.com/bzr.dev/en/user-guide/hooks.html

the trac hook should call
$ trac-admin $ENV changeset added "openerp-6" $REV

where $ENV is a directory path to my trac instance.

my first question is how could I get $REV?

the second needs a bit of explanation
I have several projects, and my repo is organised the same way, e.g.
if $ENV is /var/tracprojects/myproj, then my bzr repo is at /var/bzr/myproj
so how can I get the path of the current bzr repo the hook is called on?

thanks, Viktor
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