Towards CVS code-exchange and gateways

Now that I have a few cvs2git gateways (git-cvsimport running on cron) for the projects we work on, I am starting to need tools to "replay" chunks of git history against external CVS repositories. So I am thinking of writing two new scripts which expect to be executed inside a CVS working copy:

 + "git-cvsapplypatch < patchfile" takes a patch as formatted by
git-format-patch, apply using patch (with options to be strict of
fuzzy), prepares the commit message and (optionally) autocommit if
patch returned clean.

 + "GIT_DIR=~/foo/bar/.git git-cvsreplaycommit parent:child" takes a
pair of git revisions that must be parent/child, applies the diff on
text files and changes on binary objects. Prepares the commit message
and (optionally) autocommits if the merge was clean.

Which should lead later to a git-cvsapplymbox script to automate the process further. This part of the automation is actually a bit scary: with git, all your scripted merges take place in your private repo, and you review the result of the whole patchrun before pushing it out to a public repo. With cvs, if the merge turns out to apply cleanly but be a really bad idea... it'll be way too late. I hope to be able to find a smart way to run it in "test" mode.

Is there anyone working on a git -> cvs gateway or similar scripts?

cheers,

martin