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authorLibravatar Junio C Hamano <gitster@pobox.com>2021-10-12 13:51:39 -0700
committerLibravatar Junio C Hamano <gitster@pobox.com>2021-10-12 13:51:39 -0700
commit3fb1d4da5e7053b54a7e82543fba679f64f72b9d (patch)
tree7d6024ba8fd6a209a165487bb0cbf1e9225d3601
parentMerge branch 'pw/rebase-skip-final-fix' into maint (diff)
parentrebase -r: fix merge -c with a merge strategy (diff)
downloadtgif-3fb1d4da5e7053b54a7e82543fba679f64f72b9d.tar.xz
Merge branch 'pw/rebase-r-fixes' into maint
Various bugs in "git rebase -r" have been fixed. * pw/rebase-r-fixes: rebase -r: fix merge -c with a merge strategy rebase -r: don't write .git/MERGE_MSG when fast-forwarding rebase -i: add another reword test rebase -r: make 'merge -c' behave like reword
-rw-r--r--sequencer.c106
-rw-r--r--t/lib-rebase.sh56
-rwxr-xr-xt/t3404-rebase-interactive.sh13
-rwxr-xr-xt/t3430-rebase-merges.sh38
4 files changed, 155 insertions, 58 deletions
diff --git a/sequencer.c b/sequencer.c
index af5d2dc03a..e4627d9196 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -983,7 +983,8 @@ static int run_git_commit(const char *defmsg,
cmd.git_cmd = 1;
- if (is_rebase_i(opts) && read_env_script(&cmd.env_array)) {
+ if (is_rebase_i(opts) && !(!defmsg && (flags & AMEND_MSG)) &&
+ read_env_script(&cmd.env_array)) {
const char *gpg_opt = gpg_sign_opt_quoted(opts);
return error(_(staged_changes_advice),
@@ -3739,10 +3740,9 @@ static struct commit *lookup_label(const char *label, int len,
static int do_merge(struct repository *r,
struct commit *commit,
const char *arg, int arg_len,
- int flags, struct replay_opts *opts)
+ int flags, int *check_todo, struct replay_opts *opts)
{
- int run_commit_flags = (flags & TODO_EDIT_MERGE_MSG) ?
- EDIT_MSG | VERIFY_MSG : 0;
+ int run_commit_flags = 0;
struct strbuf ref_name = STRBUF_INIT;
struct commit *head_commit, *merge_commit, *i;
struct commit_list *bases, *j, *reversed = NULL;
@@ -3816,6 +3816,45 @@ static int do_merge(struct repository *r,
goto leave_merge;
}
+ /*
+ * If HEAD is not identical to the first parent of the original merge
+ * commit, we cannot fast-forward.
+ */
+ can_fast_forward = opts->allow_ff && commit && commit->parents &&
+ oideq(&commit->parents->item->object.oid,
+ &head_commit->object.oid);
+
+ /*
+ * If any merge head is different from the original one, we cannot
+ * fast-forward.
+ */
+ if (can_fast_forward) {
+ struct commit_list *p = commit->parents->next;
+
+ for (j = to_merge; j && p; j = j->next, p = p->next)
+ if (!oideq(&j->item->object.oid,
+ &p->item->object.oid)) {
+ can_fast_forward = 0;
+ break;
+ }
+ /*
+ * If the number of merge heads differs from the original merge
+ * commit, we cannot fast-forward.
+ */
+ if (j || p)
+ can_fast_forward = 0;
+ }
+
+ if (can_fast_forward) {
+ rollback_lock_file(&lock);
+ ret = fast_forward_to(r, &commit->object.oid,
+ &head_commit->object.oid, 0, opts);
+ if (flags & TODO_EDIT_MERGE_MSG)
+ goto fast_forward_edit;
+
+ goto leave_merge;
+ }
+
if (commit) {
const char *encoding = get_commit_output_encoding();
const char *message = logmsg_reencode(commit, NULL, encoding);
@@ -3865,46 +3904,6 @@ static int do_merge(struct repository *r,
}
}
- /*
- * If HEAD is not identical to the first parent of the original merge
- * commit, we cannot fast-forward.
- */
- can_fast_forward = opts->allow_ff && commit && commit->parents &&
- oideq(&commit->parents->item->object.oid,
- &head_commit->object.oid);
-
- /*
- * If any merge head is different from the original one, we cannot
- * fast-forward.
- */
- if (can_fast_forward) {
- struct commit_list *p = commit->parents->next;
-
- for (j = to_merge; j && p; j = j->next, p = p->next)
- if (!oideq(&j->item->object.oid,
- &p->item->object.oid)) {
- can_fast_forward = 0;
- break;
- }
- /*
- * If the number of merge heads differs from the original merge
- * commit, we cannot fast-forward.
- */
- if (j || p)
- can_fast_forward = 0;
- }
-
- if (can_fast_forward) {
- rollback_lock_file(&lock);
- ret = fast_forward_to(r, &commit->object.oid,
- &head_commit->object.oid, 0, opts);
- if (flags & TODO_EDIT_MERGE_MSG) {
- run_commit_flags |= AMEND_MSG;
- goto fast_forward_edit;
- }
- goto leave_merge;
- }
-
if (strategy || to_merge->next) {
/* Octopus merge */
struct child_process cmd = CHILD_PROCESS_INIT;
@@ -3935,7 +3934,10 @@ static int do_merge(struct repository *r,
strvec_pushf(&cmd.args,
"-X%s", opts->xopts[k]);
}
- strvec_push(&cmd.args, "--no-edit");
+ if (!(flags & TODO_EDIT_MERGE_MSG))
+ strvec_push(&cmd.args, "--no-edit");
+ else
+ strvec_push(&cmd.args, "--edit");
strvec_push(&cmd.args, "--no-ff");
strvec_push(&cmd.args, "--no-log");
strvec_push(&cmd.args, "--no-stat");
@@ -4035,10 +4037,17 @@ static int do_merge(struct repository *r,
* value (a negative one would indicate that the `merge`
* command needs to be rescheduled).
*/
- fast_forward_edit:
ret = !!run_git_commit(git_path_merge_msg(r), opts,
run_commit_flags);
+ if (!ret && flags & TODO_EDIT_MERGE_MSG) {
+ fast_forward_edit:
+ *check_todo = 1;
+ run_commit_flags |= AMEND_MSG | EDIT_MSG | VERIFY_MSG;
+ ret = !!run_git_commit(NULL, opts, run_commit_flags);
+ }
+
+
leave_merge:
strbuf_release(&ref_name);
rollback_lock_file(&lock);
@@ -4405,9 +4414,8 @@ static int pick_commits(struct repository *r,
if ((res = do_reset(r, arg, item->arg_len, opts)))
reschedule = 1;
} else if (item->command == TODO_MERGE) {
- if ((res = do_merge(r, item->commit,
- arg, item->arg_len,
- item->flags, opts)) < 0)
+ if ((res = do_merge(r, item->commit, arg, item->arg_len,
+ item->flags, &check_todo, opts)) < 0)
reschedule = 1;
else if (item->commit)
record_in_rewritten(&item->commit->object.oid,
diff --git a/t/lib-rebase.sh b/t/lib-rebase.sh
index dc75b83451..ec6b9b107d 100644
--- a/t/lib-rebase.sh
+++ b/t/lib-rebase.sh
@@ -151,3 +151,59 @@ test_editor_unchanged () {
EOF
test_cmp expect actual
}
+
+# Set up an editor for testing reword commands
+# Checks that there are no uncommitted changes when rewording and that the
+# todo-list is reread after each
+set_reword_editor () {
+ >reword-actual &&
+ >reword-oid &&
+
+ # Check rewording keeps the original authorship
+ GIT_AUTHOR_NAME="Reword Author"
+ GIT_AUTHOR_EMAIL="reword.author@example.com"
+ GIT_AUTHOR_DATE=@123456
+
+ write_script reword-sequence-editor.sh <<-\EOF &&
+ todo="$(cat "$1")" &&
+ echo "exec git log -1 --pretty=format:'%an <%ae> %at%n%B%n' \
+ >>reword-actual" >"$1" &&
+ printf "%s\n" "$todo" >>"$1"
+ EOF
+
+ write_script reword-editor.sh <<-EOF &&
+ # Save the oid of the first reworded commit so we can check rebase
+ # fast-forwards to it. Also check that we do not write .git/MERGE_MSG
+ # when fast-forwarding
+ if ! test -s reword-oid
+ then
+ git rev-parse HEAD >reword-oid &&
+ if test -f .git/MERGE_MSG
+ then
+ echo 1>&2 "error: .git/MERGE_MSG exists"
+ exit 1
+ fi
+ fi &&
+ # There should be no uncommited changes
+ git diff --exit-code HEAD &&
+ # The todo-list should be re-read after a reword
+ GIT_SEQUENCE_EDITOR="\"$PWD/reword-sequence-editor.sh\"" \
+ git rebase --edit-todo &&
+ echo edited >>"\$1"
+ EOF
+
+ test_set_editor "$PWD/reword-editor.sh"
+}
+
+# Check the results of a rebase after calling set_reword_editor
+# Pass the commits that were reworded in the order that they were picked
+# Expects the first pick to be a fast-forward
+check_reworded_commits () {
+ test_cmp_rev "$(cat reword-oid)" "$1^{commit}" &&
+ git log --format="%an <%ae> %at%n%B%nedited%n" --no-walk=unsorted "$@" \
+ >reword-expected &&
+ test_cmp reword-expected reword-actual &&
+ git log --format="%an <%ae> %at%n%B" -n $# --first-parent --reverse \
+ >reword-log &&
+ test_cmp reword-expected reword-log
+}
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 66bcbbf952..d877872e8f 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -839,6 +839,19 @@ test_expect_success 'reword' '
git show HEAD~2 | grep "C changed"
'
+test_expect_success 'no uncommited changes when rewording the todo list is reloaded' '
+ git checkout E &&
+ test_when_finished "git checkout @{-1}" &&
+ (
+ set_fake_editor &&
+ GIT_SEQUENCE_EDITOR="\"$PWD/fake-editor.sh\"" &&
+ export GIT_SEQUENCE_EDITOR &&
+ set_reword_editor &&
+ FAKE_LINES="reword 1 reword 2" git rebase -i C
+ ) &&
+ check_reworded_commits D E
+'
+
test_expect_success 'rebase -i can copy notes' '
git config notes.rewrite.rebase true &&
git config notes.rewriteRef "refs/notes/*" &&
diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh
index 6748070df5..43c82d9a33 100755
--- a/t/t3430-rebase-merges.sh
+++ b/t/t3430-rebase-merges.sh
@@ -172,19 +172,39 @@ test_expect_success 'failed `merge <branch>` does not crash' '
grep "^Merge branch ${SQ}G${SQ}$" .git/rebase-merge/message
'
-test_expect_success 'fast-forward merge -c still rewords' '
- git checkout -b fast-forward-merge-c H &&
+test_expect_success 'merge -c commits before rewording and reloads todo-list' '
+ cat >script-from-scratch <<-\EOF &&
+ merge -c E B
+ merge -c H G
+ EOF
+
+ git checkout -b merge-c H &&
(
- set_fake_editor &&
- FAKE_COMMIT_MESSAGE=edited \
- GIT_SEQUENCE_EDITOR="echo merge -c H G >" \
- git rebase -ir @^
+ set_reword_editor &&
+ GIT_SEQUENCE_EDITOR="\"$PWD/replace-editor.sh\"" \
+ git rebase -i -r D
) &&
- echo edited >expected &&
- git log --pretty=format:%B -1 >actual &&
- test_cmp expected actual
+ check_reworded_commits E H
'
+test_expect_success 'merge -c rewords when a strategy is given' '
+ git checkout -b merge-c-with-strategy H &&
+ write_script git-merge-override <<-\EOF &&
+ echo overridden$1 >G.t
+ git add G.t
+ EOF
+
+ PATH="$PWD:$PATH" \
+ GIT_SEQUENCE_EDITOR="echo merge -c H G >" \
+ GIT_EDITOR="echo edited >>" \
+ git rebase --no-ff -ir -s override -Xxopt E &&
+ test_write_lines overridden--xopt >expect &&
+ test_cmp expect G.t &&
+ test_write_lines H "" edited "" >expect &&
+ git log --format=%B -1 >actual &&
+ test_cmp expect actual
+
+'
test_expect_success 'with a branch tip that was cherry-picked already' '
git checkout -b already-upstream main &&
base="$(git rev-parse --verify HEAD)" &&