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 $(is_bare_repository), which is made before
GIT_DIR and GIT_WORK_TREE are restored. This call always returns "false",
even when we're running in a bare repository. But this means that we will
attempt to call 'git read-tree' even in a bare repository, which will fail
and print an error.
This patch modifies git-filter-branch.sh to restore the original
environment variables before trying to call is_bare_repository.
---
git-filter-branch.sh | 25 +++++++++++++------------
t/t7003-filter-branch.sh | 4 +++-
2 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index eb62f71..b75d0ba 100755
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -469,19 +469,20 @@ rm -rf "$tempdir"
trap - 0
+unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
+test -z "$ORIG_GIT_DIR" || {
+ GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
+}
+test -z "$ORIG_GIT_WORK_TREE" || {
+ GIT_WORK_TREE="$ORIG_GIT_WORK_TREE" &&
+ export GIT_WORK_TREE
+}
+test -z "$ORIG_GIT_INDEX_FILE" || {
+ GIT_INDEX_FILE="$ORIG_GIT_INDEX_FILE" &&
+ export GIT_INDEX_FILE
+}
+
if [ "$(is_bare_repository)" = false ]; then
- unset GIT_DIR GIT_WORK_TREE GIT_INDEX_FILE
- test -z "$ORIG_GIT_DIR" || {
- GIT_DIR="$ORIG_GIT_DIR" && export GIT_DIR
- }
- test -z "$ORIG_GIT_WORK_TREE" || {
- GIT_WORK_TREE="$ORIG_GIT_WORK_TREE" &&
- export GIT_WORK_TREE
- }
- test -z "$ORIG_GIT_INDEX_FILE" || {
- GIT_INDEX_FILE="$ORIG_GIT_INDEX_FILE" &&
- export GIT_INDEX_FILE
- }
git read-tree -u -m HEAD
fi
diff --git a/t/t7003-filter-branch.sh b/t/t7003-filter-branch.sh
index 8537bf9..cb04743 100755
--- a/t/t7003-filter-branch.sh
+++ b/t/t7003-filter-branch.sh
@@ -39,7 +39,9 @@ test_expect_success 'result is really identical' '
'
test_expect_success 'rewrite bare repository identically' '
- (git config core.bare true && cd .git && git filter-branch branch)
+ (git config core.bare true && cd .git &&
+ git filter-branch branch > filter-output 2>&1 &&
+ ! fgrep fatal filter-output)
'
git config core.bare false
test_expect_success 'result is really identical' '
--
1.6.1.2.253.ga34a.dirty
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