running "git init --shared" on an existing repo

Hi all,

If you forget to use "--shared" on your (bare) repo, and now need to
adjist it after the fact to make perms work ok, you ought to be able
to just run "git init --bare --shared" and things should be fine.

And it seems there was a beginning made.  builtin/init-db.c at line 220 says:

            /*
             * We would have created the above under user's umask -- under
             * shared-repository settings, we would need to fix them up.
             */
            if (shared_repository) {
                    adjust_shared_perm(get_git_dir());
                    adjust_shared_perm(git_path("refs"));
                    adjust_shared_perm(git_path("refs/heads"));
                    adjust_shared_perm(git_path("refs/tags"));
            }

Ideally, we should do the same to:

hooks
info
objects
objects/??
objects/info
objects/pack

also.  The othes are easy, but does git internals have a defined way
of doing that objects/?? part or should it just be the long way (it's
been ages since I did any C but I'd be willing to try...)

--
Sitaram