merge: Honor prepare-commit-msg return code
65969d4 (merge: honor prepare-commit-msg hook, 2011-02-14) tried to
make "git commit" and "git merge" consistent, because a merge that
required user assistance has to be concluded with "git commit", but
back then only "git commit" triggered prepare-commit-msg hook.
When it added a call to run the prepare-commit-msg hook, however, it
forgot to check the exit code from the hook like "git commit" does,
and ended up replacing one inconsistency with another.
When prepare-commit-msg hook that is run from "git merge" exits with
a non-zero status, abort the commit.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/merge.c b/builtin/merge.c
index 0ec8f0d..1aef5ea 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -903,8 +903,9 @@
if (0 < option_edit)
strbuf_add_lines(&msg, "# ", comment, strlen(comment));
write_merge_msg(&msg);
- run_hook(get_index_file(), "prepare-commit-msg",
- git_path("MERGE_MSG"), "merge", NULL, NULL);
+ if (run_hook(get_index_file(), "prepare-commit-msg",
+ git_path("MERGE_MSG"), "merge", NULL, NULL))
+ abort_commit(remoteheads, NULL);
if (0 < option_edit) {
if (launch_editor(git_path("MERGE_MSG"), NULL, NULL))
abort_commit(remoteheads, NULL);
diff --git a/t/t7505-prepare-commit-msg-hook.sh b/t/t7505-prepare-commit-msg-hook.sh
index 5b4b694..3573751 100755
--- a/t/t7505-prepare-commit-msg-hook.sh
+++ b/t/t7505-prepare-commit-msg-hook.sh
@@ -167,5 +167,19 @@
'
+test_expect_success 'with failing hook (merge)' '
+
+ git checkout -B other HEAD@{1} &&
+ echo "more" >> file &&
+ git add file &&
+ rm -f "$HOOK" &&
+ git commit -m other &&
+ write_script "$HOOK" <<-EOF
+ exit 1
+ EOF
+ git checkout - &&
+ test_must_fail git merge other
+
+'
test_done
