git/t/t3403-rebase-skip.sh
Phillip Wood 430b75f720 commit: give correct advice for empty commit during a rebase
In dcb500dc16 (cherry-pick/revert: advise using --skip, 2019-07-02),
`git commit` learned to suggest to run `git cherry-pick --skip` when
trying to cherry-pick an empty patch.

However, it was overlooked that there are more conditions than just a
`git cherry-pick` when this advice is printed (which originally
suggested the neutral `git reset`): the same can happen during a rebase.

Let's suggest the correct command, even during a rebase.

While at it, we adjust more places in `builtin/commit.c` that
incorrectly assumed that the presence of a `CHERRY_PICK_HEAD` meant that
surely this must be a `cherry-pick` in progress.

Note: we take pains to handle the situation when a user runs a `git
cherry-pick` _during_ a rebase. This is quite valid (e.g. in an `exec`
line in an interactive rebase). On the other hand, it is not possible to
run a rebase during a cherry-pick, meaning: if both `rebase-merge/` and
`sequencer/` exist or CHERRY_PICK_HEAD and REBASE_HEAD point to the same
commit , we still want to advise to use `git cherry-pick --skip`.

Original-patch-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-06 09:32:02 -08:00

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#!/bin/sh
#
# Copyright (c) 2006 Eric Wong
#
test_description='git rebase --merge --skip tests'
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
# we assume the default git am -3 --skip strategy is tested independently
# and always works :)
test_expect_success setup '
echo hello > hello &&
git add hello &&
git commit -m "hello" &&
git branch skip-reference &&
echo world >> hello &&
git commit -a -m "hello world" &&
echo goodbye >> hello &&
git commit -a -m "goodbye" &&
git tag goodbye &&
git checkout --detach &&
git checkout HEAD^ . &&
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 &&
git commit -a -m "we should skip this" &&
echo moo > cow &&
git add cow &&
git commit -m "this should not be skipped" &&
git branch pre-rebase skip-reference &&
git branch skip-merge skip-reference
'
test_expect_success 'rebase with git am -3 (default)' '
test_must_fail git rebase master
'
test_expect_success 'rebase --skip can not be used with other options' '
test_must_fail git rebase -v --skip &&
test_must_fail git rebase --skip -v
'
test_expect_success 'rebase --skip with am -3' '
git rebase --skip
'
test_expect_success 'rebase moves back to skip-reference' '
test refs/heads/skip-reference = $(git symbolic-ref HEAD) &&
git branch post-rebase &&
git reset --hard pre-rebase &&
test_must_fail git rebase master &&
echo "hello" > hello &&
git add hello &&
git rebase --continue &&
test refs/heads/skip-reference = $(git symbolic-ref HEAD) &&
git reset --hard post-rebase
'
test_expect_success 'checkout skip-merge' 'git checkout -f skip-merge'
test_expect_success 'rebase with --merge' '
test_must_fail git rebase --merge master
'
test_expect_success 'rebase --skip with --merge' '
git rebase --skip
'
test_expect_success 'merge and reference trees equal' '
test -z "$(git diff-tree skip-merge skip-reference)"
'
test_expect_success 'moved back to branch correctly' '
test refs/heads/skip-merge = $(git symbolic-ref HEAD)
'
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 rebase --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git rebase --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 rebase --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git rebase --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 rebase --skip" err &&
test_must_fail git commit &&
test_i18ngrep "git rebase --skip" err
'
test_expect_success 'correct advice upon cherry-picking an empty commit during a rebase' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="1 exec_git_cherry-pick_amended-goodbye" \
git rebase -i goodbye^ goodbye 2>err
) &&
test_i18ngrep "previous cherry-pick is now empty" err &&
test_i18ngrep "git cherry-pick --skip" err &&
test_must_fail git commit 2>err &&
test_i18ngrep "git cherry-pick --skip" err
'
test_expect_success 'correct advice upon multi cherry-pick picking an empty commit during a rebase' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="1 exec_git_cherry-pick_goodbye_amended-goodbye" \
git rebase -i goodbye^^ goodbye 2>err
) &&
test_i18ngrep "previous cherry-pick is now empty" err &&
test_i18ngrep "git cherry-pick --skip" err &&
test_must_fail git commit 2>err &&
test_i18ngrep "git cherry-pick --skip" err
'
test_expect_success 'fixup that empties commit fails' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="1 fixup 2" git rebase -i \
goodbye^ reverted-goodbye
)
'
test_expect_success 'squash that empties commit fails' '
test_when_finished "git rebase --abort" &&
(
set_fake_editor &&
test_must_fail env FAKE_LINES="1 squash 2" git rebase -i \
goodbye^ reverted-goodbye
)
'
# Must be the last test in this file
test_expect_success '$EDITOR and friends are unchanged' '
test_editor_unchanged
'
test_done