Support for bug-fixed metadata

Do you think trac-bzr should work as watcher of changes in branches? And once new revision is available then it should scan it for bugs metadata? This will require to implementing long-running watcher thread or subprocess.

From other hand user can use post_change_branch_tip hook if the branches served by some sort of bzr server.

IMHO post_change_branch_tip is the way to go -- the equivalent of that is what Trac uses for handling specially formatted commit comments with SVN too. Especially if the metadata scan of newly seen revisions would be so expensive that it would require running in another thread/process (which is downright impossible if using Trac with CGI and resources-unfriendly otherwise).

A post_change_branch_tip has the disadvantage that it will only work in case the user has a particular plugin installed that supports that post_change_branch_tip hook.

I'd like to see a script that can be run on a particular branch and can close all relevant bugs. Such a script can then be run from e.g. a cronscript.