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git/t/t3430-rebase-merges.sh
Ævar Arnfjörð Bjarmason bef805b7d8 tests: change "mkdir -p && write_script" to use "test_hook" 
Change tests that used a "mkdir -p .git/hooks && write_script" pattern
to use the new "test_hook" helper instead. The new helper does not
create the .git/hooks directory, rather we assume that the default
template will do so for us.

An upcoming series[1] will extend "test_hook" to operate in a
"--template=" mode, but for now assuming that we have a .git/hooks
already is a safe assumption. If that assumption becomes false in the
future we'll only need to change 'test_hook", instead of all of these
callsites.

1. https://lore.kernel.org/git/cover-00.13-00000000000-20211212T201308Z-avarab@gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-03-17 08:40:26 -07:00

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#!/bin/sh
#
# Copyright (c) 2018 Johannes E. Schindelin
#
test_description='git rebase -i --rebase-merges
This test runs git rebase "interactively", retaining the branch structure by
recreating merge commits.
Initial setup:
-- B -- (first)
/ \
A - C - D - E - H (main)
\ \ /
\ F - G (second)
\
Conflicting-G
'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
. "$TEST_DIRECTORY"/lib-log-graph.sh
test_cmp_graph () {
cat >expect &&
lib_test_cmp_graph --boundary --format=%s "$@"
}
test_expect_success 'setup' '
write_script replace-editor.sh <<-\EOF &&
mv "$1" "$(git rev-parse --git-path ORIGINAL-TODO)"
cp script-from-scratch "$1"
EOF
test_commit A &&
git checkout -b first &&
test_commit B &&
b=$(git rev-parse --short HEAD) &&
git checkout main &&
test_commit C &&
c=$(git rev-parse --short HEAD) &&
test_commit D &&
d=$(git rev-parse --short HEAD) &&
git merge --no-commit B &&
test_tick &&
git commit -m E &&
git tag -m E E &&
e=$(git rev-parse --short HEAD) &&
git checkout -b second C &&
test_commit F &&
f=$(git rev-parse --short HEAD) &&
test_commit G &&
g=$(git rev-parse --short HEAD) &&
git checkout main &&
git merge --no-commit G &&
test_tick &&
git commit -m H &&
h=$(git rev-parse --short HEAD) &&
git tag -m H H &&
git checkout A &&
test_commit conflicting-G G.t
'
test_expect_success 'create completely different structure' '
cat >script-from-scratch <<-\EOF &&
label onto
# onebranch
pick G
pick D
label onebranch
# second
reset onto
pick B
label second
reset onto
merge -C H second
merge onebranch # Merge the topic branch '\''onebranch'\''
EOF
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
git rebase -i -r A main &&
test_cmp_graph <<-\EOF
* Merge the topic branch '\''onebranch'\''
|\
| * D
| * G
* | H
|\ \
| |/
|/|
| * B
|/
* A
EOF
'
test_expect_success 'generate correct todo list' '
cat >expect <<-EOF &&
label onto
reset onto
pick $b B
label E
reset onto
pick $c C
label branch-point
pick $f F
pick $g G
label H
reset branch-point # C
pick $d D
merge -C $e E # E
merge -C $h H # H
EOF
grep -v "^#" <.git/ORIGINAL-TODO >output &&
test_cmp expect output
'
test_expect_success '`reset` refuses to overwrite untracked files' '
git checkout -b refuse-to-reset &&
test_commit dont-overwrite-untracked &&
git checkout @{-1} &&
: >dont-overwrite-untracked.t &&
echo "reset refs/tags/dont-overwrite-untracked" >script-from-scratch &&
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_must_fail git rebase -ir HEAD &&
git rebase --abort
'
test_expect_success 'failed `merge -C` writes patch (may be rescheduled, too)' '
test_when_finished "test_might_fail git rebase --abort" &&
git checkout -b conflicting-merge A &&
: fail because of conflicting untracked file &&
>G.t &&
echo "merge -C H G" >script-from-scratch &&
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
test_must_fail git rebase -ir HEAD &&
grep "^merge -C .* G$" .git/rebase-merge/done &&
grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
test_path_is_file .git/rebase-merge/patch &&
: fail because of merge conflict &&
rm G.t .git/rebase-merge/patch &&
git reset --hard conflicting-G &&
test_must_fail git rebase --continue &&
! grep "^merge -C .* G$" .git/rebase-merge/git-rebase-todo &&
test_path_is_file .git/rebase-merge/patch
'
test_expect_success 'failed `merge <branch>` does not crash' '
test_when_finished "test_might_fail git rebase --abort" &&
git checkout conflicting-G &&
echo "merge G" >script-from-scratch &&
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
test_must_fail git rebase -ir HEAD &&
! grep "^merge G$" .git/rebase-merge/git-rebase-todo &&
grep "^Merge branch ${SQ}G${SQ}$" .git/rebase-merge/message
'
test_expect_success 'merge -c commits before rewording and reloads todo-list' '
cat >script-from-scratch <<-\EOF &&
merge -c E B
merge -c H G
EOF
git checkout -b merge-c H &&
(
set_reword_editor &&
GIT_SEQUENCE_EDITOR="\"$PWD/replace-editor.sh\"" \
git rebase -i -r D
) &&
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)" &&
test_commit A1 &&
test_commit A2 &&
git reset --hard $base &&
test_commit B1 &&
test_tick &&
git merge -m "Merge branch A" A2 &&
git checkout -b upstream-with-a2 $base &&
test_tick &&
git cherry-pick A2 &&
git checkout already-upstream &&
test_tick &&
git rebase -i -r upstream-with-a2 &&
test_cmp_graph upstream-with-a2.. <<-\EOF
* Merge branch A
|\
| * A1
* | B1
|/
o A2
EOF
'
test_expect_success 'do not rebase cousins unless asked for' '
git checkout -b cousins main &&
before="$(git rev-parse --verify HEAD)" &&
test_tick &&
git rebase -r HEAD^ &&
test_cmp_rev HEAD $before &&
test_tick &&
git rebase --rebase-merges=rebase-cousins HEAD^ &&
test_cmp_graph HEAD^.. <<-\EOF
* Merge the topic branch '\''onebranch'\''
|\
| * D
| * G
|/
o H
EOF
'
test_expect_success 'refs/rewritten/* is worktree-local' '
git worktree add wt &&
cat >wt/script-from-scratch <<-\EOF &&
label xyz
exec GIT_DIR=../.git git rev-parse --verify refs/rewritten/xyz >a || :
exec git rev-parse --verify refs/rewritten/xyz >b
EOF
test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
git -C wt rebase -i HEAD &&
test_must_be_empty wt/a &&
test_cmp_rev HEAD "$(cat wt/b)"
'
test_expect_success '--abort cleans up refs/rewritten' '
git checkout -b abort-cleans-refs-rewritten H &&
GIT_SEQUENCE_EDITOR="echo break >>" git rebase -ir @^ &&
git rev-parse --verify refs/rewritten/onto &&
git rebase --abort &&
test_must_fail git rev-parse --verify refs/rewritten/onto
'
test_expect_success '--quit cleans up refs/rewritten' '
git checkout -b quit-cleans-refs-rewritten H &&
GIT_SEQUENCE_EDITOR="echo break >>" git rebase -ir @^ &&
git rev-parse --verify refs/rewritten/onto &&
git rebase --quit &&
test_must_fail git rev-parse --verify refs/rewritten/onto
'
test_expect_success 'post-rewrite hook and fixups work for merges' '
git checkout -b post-rewrite H &&
test_commit same1 &&
git reset --hard HEAD^ &&
test_commit same2 &&
git merge -m "to fix up" same1 &&
echo same old same old >same2.t &&
test_tick &&
git commit --fixup HEAD same2.t &&
fixup="$(git rev-parse HEAD)" &&
test_hook post-rewrite <<-\EOF &&
cat >actual
EOF
test_tick &&
git rebase -i --autosquash -r HEAD^^^ &&
printf "%s %s\n%s %s\n%s %s\n%s %s\n" >expect $(git rev-parse \
$fixup^^2 HEAD^2 \
$fixup^^ HEAD^ \
$fixup^ HEAD \
$fixup HEAD) &&
test_cmp expect actual
'
test_expect_success 'refuse to merge ancestors of HEAD' '
echo "merge HEAD^" >script-from-scratch &&
test_config -C wt sequence.editor \""$PWD"/replace-editor.sh\" &&
before="$(git rev-parse HEAD)" &&
git rebase -i HEAD &&
test_cmp_rev HEAD $before
'
test_expect_success 'root commits' '
git checkout --orphan unrelated &&
(GIT_AUTHOR_NAME="Parsnip" GIT_AUTHOR_EMAIL="root@example.com" \
test_commit second-root) &&
test_commit third-root &&
cat >script-from-scratch <<-\EOF &&
pick third-root
label first-branch
reset [new root]
pick second-root
merge first-branch # Merge the 3rd root
EOF
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
git rebase -i --force-rebase --root -r &&
test "Parsnip" = "$(git show -s --format=%an HEAD^)" &&
test $(git rev-parse second-root^0) != $(git rev-parse HEAD^) &&
test $(git rev-parse second-root:second-root.t) = \
$(git rev-parse HEAD^:second-root.t) &&
test_cmp_graph HEAD <<-\EOF &&
* Merge the 3rd root
|\
| * third-root
* second-root
EOF
: fast forward if possible &&
before="$(git rev-parse --verify HEAD)" &&
test_might_fail git config --unset sequence.editor &&
test_tick &&
git rebase -i --root -r &&
test_cmp_rev HEAD $before
'
test_expect_success 'a "merge" into a root commit is a fast-forward' '
head=$(git rev-parse HEAD) &&
cat >script-from-scratch <<-EOF &&
reset [new root]
merge $head
EOF
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
git rebase -i -r HEAD^ &&
test_cmp_rev HEAD $head
'
test_expect_success 'A root commit can be a cousin, treat it that way' '
git checkout --orphan khnum &&
test_commit yama &&
git checkout -b asherah main &&
test_commit shamkat &&
git merge --allow-unrelated-histories khnum &&
test_tick &&
git rebase -f -r HEAD^ &&
test_cmp_rev ! HEAD^2 khnum &&
test_cmp_graph HEAD^.. <<-\EOF &&
* Merge branch '\''khnum'\'' into asherah
|\
| * yama
o shamkat
EOF
test_tick &&
git rebase --rebase-merges=rebase-cousins HEAD^ &&
test_cmp_graph HEAD^.. <<-\EOF
* Merge branch '\''khnum'\'' into asherah
|\
| * yama
|/
o shamkat
EOF
'
test_expect_success 'labels that are object IDs are rewritten' '
git checkout -b third B &&
test_commit I &&
third=$(git rev-parse HEAD) &&
git checkout -b labels main &&
git merge --no-commit third &&
test_tick &&
git commit -m "Merge commit '\''$third'\'' into labels" &&
echo noop >script-from-scratch &&
test_config sequence.editor \""$PWD"/replace-editor.sh\" &&
test_tick &&
git rebase -i -r A &&
grep "^label $third-" .git/ORIGINAL-TODO &&
! grep "^label $third$" .git/ORIGINAL-TODO
'
test_expect_success 'octopus merges' '
git checkout -b three &&
test_commit before-octopus &&
test_commit three &&
git checkout -b two HEAD^ &&
test_commit two &&
git checkout -b one HEAD^ &&
test_commit one &&
test_tick &&
(GIT_AUTHOR_NAME="Hank" GIT_AUTHOR_EMAIL="hank@sea.world" \
git merge -m "Tüntenfüsch" two three) &&
: fast forward if possible &&
before="$(git rev-parse --verify HEAD)" &&
test_tick &&
git rebase -i -r HEAD^^ &&
test_cmp_rev HEAD $before &&
test_tick &&
git rebase -i --force-rebase -r HEAD^^ &&
test "Hank" = "$(git show -s --format=%an HEAD)" &&
test "$before" != $(git rev-parse HEAD) &&
test_cmp_graph HEAD^^.. <<-\EOF
*-. Tüntenfüsch
|\ \
| | * three
| * | two
| |/
* / one
|/
o before-octopus
EOF
'
test_expect_success 'with --autosquash and --exec' '
git checkout -b with-exec H &&
echo Booh >B.t &&
test_tick &&
git commit --fixup B B.t &&
write_script show.sh <<-\EOF &&
subject="$(git show -s --format=%s HEAD)"
content="$(git diff HEAD^ HEAD | tail -n 1)"
echo "$subject: $content"
EOF
test_tick &&
git rebase -ir --autosquash --exec ./show.sh A >actual &&
grep "B: +Booh" actual &&
grep "E: +Booh" actual &&
grep "G: +G" actual
'
test_expect_success '--continue after resolving conflicts after a merge' '
git checkout -b already-has-g E &&
git cherry-pick E..G &&
test_commit H2 &&
git checkout -b conflicts-in-merge H &&
test_commit H2 H2.t conflicts H2-conflict &&
test_must_fail git rebase -r already-has-g &&
grep conflicts H2.t &&
echo resolved >H2.t &&
git add -u &&
git rebase --continue &&
test_must_fail git rev-parse --verify HEAD^2 &&
test_path_is_missing .git/MERGE_HEAD
'
test_expect_success '--rebase-merges with strategies' '
git checkout -b with-a-strategy F &&
test_tick &&
git merge -m "Merge conflicting-G" conflicting-G &&
: first, test with a merge strategy option &&
git rebase -ir -Xtheirs G &&
echo conflicting-G >expect &&
test_cmp expect G.t &&
: now, try with a merge strategy other than recursive &&
git reset --hard @{1} &&
write_script git-merge-override <<-\EOF &&
echo overridden$1 >>G.t
git add G.t
EOF
PATH="$PWD:$PATH" git rebase -ir -s override -Xxopt G &&
test_write_lines G overridden--xopt >expect &&
test_cmp expect G.t
'
test_expect_success '--rebase-merges with commit that can generate bad characters for filename' '
git checkout -b colon-in-label E &&
git merge -m "colon: this should work" G &&
git rebase --rebase-merges --force-rebase E
'
test_expect_success '--rebase-merges with message matched with onto label' '
git checkout -b onto-label E &&
git merge -m onto G &&
git rebase --rebase-merges --force-rebase E &&
test_cmp_graph <<-\EOF
* onto
|\
| * G
| * F
* | E
|\ \
| * | B
* | | D
| |/
|/|
* | C
|/
* A
EOF
'
test_done
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