git/t/t3407-rebase-abort.sh
Phillip Wood bc7f5db896 prune: mark rebase autostash and orig-head as reachable
Rebase records the oid of HEAD before rebasing and the commit created by
"--autostash" in files in the rebase state directory. This means that
the autostash commit is never reachable from any ref or reflog and when
rebasing a detached HEAD the original HEAD can become unreachable if the
user expires HEAD's the reflog while the rebase is running. Fix this by
reading the relevant files when marking reachable commits.

Note that it is possible for the commit recorded in
.git/rebase-merge/amend to be unreachable but pruning that object does
not affect the operation of "git rebase --continue" as we're only
interested in the object id, not in the object itself.

Reported-by: Orgad Shaneh <orgads@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-02-09 10:04:59 -08:00

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#!/bin/sh
test_description='git rebase --abort tests'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
test_expect_success setup '
test_commit a a a &&
git branch to-rebase &&
test_commit --annotate b a b &&
test_commit --annotate c a c &&
git checkout to-rebase &&
test_commit "merge should fail on this" a d d &&
test_commit --annotate "merge should fail on this, too" a e pre-rebase
'
# Check that HEAD is equal to "pre-rebase" and the current branch is
# "to-rebase"
check_head() {
test_cmp_rev HEAD pre-rebase^{commit} &&
test "$(git symbolic-ref HEAD)" = refs/heads/to-rebase
}
testrebase() {
type=$1
state_dir=$2
test_expect_success "rebase$type --abort" '
# Clean up the state from the previous one
git reset --hard pre-rebase &&
test_must_fail git rebase$type main &&
test_path_is_dir "$state_dir" &&
git rebase --abort &&
check_head &&
test_path_is_missing "$state_dir"
'
test_expect_success "pre rebase$type head is marked as reachable" '
# Clean up the state from the previous one
git checkout -f --detach pre-rebase &&
test_tick &&
git commit --amend --only -m "reworded" &&
orig_head=$(git rev-parse HEAD) &&
test_must_fail git rebase$type main &&
# Stop ORIG_HEAD marking $state_dir/orig-head as reachable
git update-ref -d ORIG_HEAD &&
git reflog expire --expire="$GIT_COMMITTER_DATE" --all &&
git prune --expire=now &&
git rebase --abort &&
test_cmp_rev $orig_head HEAD
'
test_expect_success "rebase$type --abort after --skip" '
# Clean up the state from the previous one
git checkout -B to-rebase pre-rebase &&
test_must_fail git rebase$type main &&
test_path_is_dir "$state_dir" &&
test_must_fail git rebase --skip &&
test_cmp_rev HEAD main &&
git rebase --abort &&
check_head &&
test_path_is_missing "$state_dir"
'
test_expect_success "rebase$type --abort after --continue" '
# Clean up the state from the previous one
git reset --hard pre-rebase &&
test_must_fail git rebase$type main &&
test_path_is_dir "$state_dir" &&
echo c > a &&
echo d >> a &&
git add a &&
test_must_fail git rebase --continue &&
test_cmp_rev ! HEAD main &&
git rebase --abort &&
check_head &&
test_path_is_missing "$state_dir"
'
test_expect_success "rebase$type --abort when checking out a tag" '
test_when_finished "git symbolic-ref HEAD refs/heads/to-rebase" &&
git reset --hard a -- &&
test_must_fail git rebase$type --onto b c pre-rebase &&
test_cmp_rev HEAD b^{commit} &&
git rebase --abort &&
test_cmp_rev HEAD pre-rebase^{commit} &&
! git symbolic-ref HEAD
'
test_expect_success "rebase$type --abort does not update reflog" '
# Clean up the state from the previous one
git reset --hard pre-rebase &&
git reflog show to-rebase > reflog_before &&
test_must_fail git rebase$type main &&
git rebase --abort &&
git reflog show to-rebase > reflog_after &&
test_cmp reflog_before reflog_after &&
rm reflog_before reflog_after
'
test_expect_success 'rebase --abort can not be used with other options' '
# Clean up the state from the previous one
git reset --hard pre-rebase &&
test_must_fail git rebase$type main &&
test_must_fail git rebase -v --abort &&
test_must_fail git rebase --abort -v &&
git rebase --abort
'
test_expect_success "rebase$type --quit" '
test_when_finished "git symbolic-ref HEAD refs/heads/to-rebase" &&
# Clean up the state from the previous one
git reset --hard pre-rebase &&
test_must_fail git rebase$type main &&
test_path_is_dir $state_dir &&
head_before=$(git rev-parse HEAD) &&
git rebase --quit &&
test_cmp_rev HEAD $head_before &&
test_path_is_missing .git/rebase-apply
'
}
testrebase " --apply" .git/rebase-apply
testrebase " --merge" .git/rebase-merge
test_done