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9273b56278
When git filter-branch is run on a bare repository, it prints out a fatal
error message:
$ git filter-branch branch
Rewrite 476c4839280c219c2317376b661d9d95c1727fc3 (9/9)
WARNING: Ref 'refs/heads/branch' is unchanged
fatal: This operation must be run in a work tree
Note that this fatal error message doesn't prevent git filter-branch from
exiting successfully. (Why doesn't git filter-branch actually exit with an
error when a shell command fails? I'm not sure why it was designed this
way.)
This error message is caused by the following section of code at the end of
git-filter-branch.sh:
if [ "$(is_bare_repository)" = false ]; then
unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
test -z "$ORIG_GIT_DIR" || {
GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
}
... elided ...
git read-tree -u -m HEAD
fi
The problem is the call to $(is_bare_repository), which is made before
GIT_DIR and GIT_WORK_TREE are restored. This call always returns "false",
even when we're running in a bare repository. But this means that we will
attempt to call 'git read-tree' even in a bare repository, which will fail
and print an error.
This patch modifies git-filter-branch.sh to restore the original
environment variables before trying to call is_bare_repository.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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