Git-svn: Bulk removing orphaned remote branches

Question

A project in SVN I'm working on (via git-svn) has frequently-created branches that are then --reintegrated with trunk, and then deleted.

Right now the project has about 10 branches that have not been deleted, but in git, git branch -r shows about 50.

I can remove these one at a time, checking whether they still exist in the svn repository but it's slow and tedious. Is there a way to sync my list of git remote branches with the svn repo?

Answer 1

This is a quick-n-dirty solution I made in a few minutes. It makes use of nice regex patterns that are not available everywhere.

This grabs a clean list of branches. I remove formatting spaces at the beginning of each line, and I'm ignoring tags for now:

git branch -r | sed 's|^[[:space:]]*||' | grep -v '^tags/' > git-branch-list

I grab a similar list of branches from svn, again removing formatting and trailing forward-slashes:

svn ls svn://path/to/branch/dir/ | sed 's|^[[:space:]]*||' | sed 's|/$||' > svn-branch-list

I diff the lists, find the lines that don't exist in the svn list anymore, remove the diff formatting, get rid of the "trunk" branch (which is a git-svn convenience) and save the results to a new list:

diff -u git-branch-list svn-branch-list | grep '^-' | sed 's|^-||' | grep -v '^trunk$' | grep -v '^--' > old-branch-list

Now I just perform standard branch removal procedures for git-svn:

for i in `cat old-branch-list`; do git branch -d -r "$i"; rm -rf .git/svn/refs/remotes/"$i"; done

There's probably better ways of doing this, but it works. Someone else is welcome to take this and improve on it.