Re: [fixed PATCH] git-filter-branch.sh: Fix broken setting of GIT_DIR

David Kastrup [off-list ref] writes:

If filter-branch is entered with an unset GIT_DIR, things are rather
fragile.  The GIT_DIR variable setting then points to something like
$(pwd)/../.. which is neither guaranteed to be a git directory

I think this comment refers to this part, ...

-case "$GIT_DIR" in
-/*)
-	;;
-*)
-	GIT_DIR="$(pwd)/../../$GIT_DIR"
-	;;
-esac

... however, at the beginning of the script, it dot-includes
git-sh-setup, which sets (but not export) GIT_DIR for the rest
of the script to use (see the last if..then..else).

If you got an unset GIT_DIR when you reached that case statement
you are removing here, I suspect that there is something else
going on, but I do not see what it is...

Puzzled...