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sequencer: write CHERRY_PICK_HEAD for reword and edit 

`git commit` relies on the presence of CHERRY_PICK_HEAD to show the
correct error message in the case of an empty pick.  This fixes a
regression introduced by the conversion from shell to C. In the shell
version everything was a cherry-pick as far as the sequencer code was
concerned so it always wrote CHERRY_PICK_HEAD. The conversion to C
forgot to update the code that creates CHERRY_PICK_HEAD. We do not want
to create CHERRY_PICK_HEAD for fixup and squash commands as that would
prevent `git commit --amend` from running.

Note that the error message shown by `git commit` for an empty pick
during a rebase is currently wrong as it talks about running `git
cherry-pick --skip` rather than `git rebase --skip`. This will be fixed
in a future commit which is why the tests are in t3403-rebase-skip.sh.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Phillip Wood 2019-12-06 16:06:09 +00:00 committed by Junio C Hamano
parent f028d661c7
commit 21b11c6d1d
2 changed files with 56 additions and 1 deletions
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4
sequencer.c
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@ -1916,7 +1916,9 @@ static int do_pick_commit(struct repository *r,
* However, if the merge did not even start, then we don't want to
* write it at all.
*/
if (command == TODO_PICK && !opts->no_commit && (res == 0 || res == 1) &&
if ((command == TODO_PICK || command == TODO_REWORD ||
command == TODO_EDIT) && !opts->no_commit &&
(res == 0 || res == 1) &&
update_ref(NULL, "CHERRY_PICK_HEAD", &commit->object.oid, NULL,
REF_NO_DEREF, UPDATE_REFS_MSG_ON_ERR))
res = -1;

53
t/t3403-rebase-skip.sh
View File

@ -29,6 +29,13 @@ test_expect_success setup '
test_tick &&
git commit -m reverted-goodbye &&
git tag reverted-goodbye &&
git checkout goodbye &&
test_tick &&
GIT_AUTHOR_NAME="Another Author" \
GIT_AUTHOR_EMAIL="another.author@example.com" \
git commit --amend --no-edit -m amended-goodbye &&
test_tick &&
git tag amended-goodbye &&
git checkout -f skip-reference &&
echo moo > hello &&
@ -85,6 +92,52 @@ test_expect_success 'moved back to branch correctly' '
test_debug 'gitk --all & sleep 1'
test_expect_success 'correct advice upon picking empty commit' '
test_when_finished "git rebase --abort" &&
test_must_fail git rebase -i --onto goodbye \
amended-goodbye^ amended-goodbye 2>err &&
test_i18ngrep "previous cherry-pick is now empty" err &&
test_i18ngrep "git cherry-pick --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git cherry-pick --skip" err
'
test_expect_success 'correct authorship when committing empty pick' '
test_when_finished "git rebase --abort" &&
test_must_fail git rebase -i --onto goodbye \
amended-goodbye^ amended-goodbye &&
git commit --allow-empty &&
git log --pretty=format:"%an <%ae>%n%ad%B" -1 amended-goodbye >expect &&
git log --pretty=format:"%an <%ae>%n%ad%B" -1 HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'correct advice upon rewording empty commit' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="reword 1" git rebase -i \
--onto goodbye amended-goodbye^ amended-goodbye 2>err
) &&
test_i18ngrep "previous cherry-pick is now empty" err &&
test_i18ngrep "git cherry-pick --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git cherry-pick --skip" err
'
test_expect_success 'correct advice upon editing empty commit' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="edit 1" git rebase -i \
--onto goodbye amended-goodbye^ amended-goodbye 2>err
) &&
test_i18ngrep "previous cherry-pick is now empty" err &&
test_i18ngrep "git cherry-pick --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git cherry-pick --skip" err
'
test_expect_success 'fixup that empties commit fails' '
test_when_finished "git rebase --abort" &&
(