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git/t/t3418-rebase-continue.sh
Ævar Arnfjörð Bjarmason e5b32bffd1 rebase: don't override --no-reschedule-failed-exec with config
Fix a bug in how --no-reschedule-failed-exec interacts with
rebase.rescheduleFailedExec=true being set in the config. Before this
change the --no-reschedule-failed-exec config option would be
overridden by the config.

This bug happened because of the particulars of how "rebase" works
v.s. most other git commands when it comes to parsing options and
config:

When we read the config and parse the CLI options we correctly prefer
the --no-reschedule-failed-exec option over
rebase.rescheduleFailedExec=true in the config. So far so good.

However the --reschedule-failed-exec option doesn't take effect when
the rebase starts (we'd just create a
".git/rebase-merge/reschedule-failed-exec" file if it was true). It
only takes effect when the exec command fails, at which point we'll
reschedule the failed "exec" command.

Since we only wrote out the positive
".git/rebase-merge/reschedule-failed-exec" under
--reschedule-failed-exec, but nothing with --no-reschedule-failed-exec
we'll forget that we asked not to reschedule failed "exec", and would
happily re-read the config and see that
rebase.rescheduleFailedExec=true is set.

So the config will effectively override the user having explicitly
disabled the option on the command-line.

Even more confusingly: Since rebase accepts different options based on
its state there wasn't even a way to get around this with "rebase
--continue --no-reschedule-failed-exec" (but you could of course set
the config with "rebase -c ...").

I think the least bad way out of this is to declare that for such
options and config whatever we decide at the beginning of the rebase
goes. So we'll now always create either a "reschedule-failed-exec" or
a "no-reschedule-failed-exec file at the start, not just the former if
we decided we wanted the feature.

With this new worldview you can no longer change the setting once a
rebase has started except by manually removing the state files
discussed above. I think making it work like that is the the least
confusing thing we can do.

In the future we might want to learn to change the setting in the
middle by combining "--edit-todo" with
"--[no-]reschedule-failed-exec", we currently don't support combining
those options, or any other way to change the state in the middle of
the rebase short of manually editing the files in
".git/rebase-merge/*".

The bug being fixed here originally came about because of a
combination of the behavior of the code added in d421afa0c6 (rebase:
introduce --reschedule-failed-exec, 2018-12-10) and the addition of
the config variable in 969de3ff0e (rebase: add a config option to
default to --reschedule-failed-exec, 2018-12-10).

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-10 23:23:49 -07:00

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#!/bin/sh
test_description='git rebase --continue tests'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
. ./test-lib.sh
. "$TEST_DIRECTORY"/lib-rebase.sh
set_fake_editor
test_expect_success 'setup' '
test_commit "commit-new-file-F1" F1 1 &&
test_commit "commit-new-file-F2" F2 2 &&
git checkout -b topic HEAD^ &&
test_commit "commit-new-file-F2-on-topic-branch" F2 22 &&
git checkout main
'
test_expect_success 'interactive rebase --continue works with touched file' '
rm -fr .git/rebase-* &&
git reset --hard &&
git checkout main &&
FAKE_LINES="edit 1" git rebase -i HEAD^ &&
test-tool chmtime =-60 F1 &&
git rebase --continue
'
test_expect_success 'non-interactive rebase --continue works with touched file' '
rm -fr .git/rebase-* &&
git reset --hard &&
git checkout main &&
test_must_fail git rebase --onto main main topic &&
echo "Resolved" >F2 &&
git add F2 &&
test-tool chmtime =-60 F1 &&
git rebase --continue
'
test_expect_success 'rebase --continue can not be used with other options' '
test_must_fail git rebase -v --continue &&
test_must_fail git rebase --continue -v
'
test_expect_success 'rebase --continue remembers merge strategy and options' '
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F2-on-topic-branch &&
test_commit "commit-new-file-F3-on-topic-branch" F3 32 &&
test_when_finished "rm -fr test-bin funny.was.run" &&
mkdir test-bin &&
cat >test-bin/git-merge-funny <<-EOF &&
#!$SHELL_PATH
case "\$1" in --opt) ;; *) exit 2 ;; esac
shift &&
>funny.was.run &&
exec git merge-recursive "\$@"
EOF
chmod +x test-bin/git-merge-funny &&
(
PATH=./test-bin:$PATH &&
test_must_fail git rebase -s funny -Xopt main topic
) &&
test -f funny.was.run &&
rm funny.was.run &&
echo "Resolved" >F2 &&
git add F2 &&
(
PATH=./test-bin:$PATH &&
git rebase --continue
) &&
test -f funny.was.run
'
test_expect_success 'rebase -i --continue handles merge strategy and options' '
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F2-on-topic-branch &&
test_commit "commit-new-file-F3-on-topic-branch-for-dash-i" F3 32 &&
test_when_finished "rm -fr test-bin funny.was.run funny.args" &&
mkdir test-bin &&
cat >test-bin/git-merge-funny <<-EOF &&
#!$SHELL_PATH
echo "\$@" >>funny.args
case "\$1" in --opt) ;; *) exit 2 ;; esac
case "\$2" in --foo) ;; *) exit 2 ;; esac
case "\$4" in --) ;; *) exit 2 ;; esac
shift 2 &&
>funny.was.run &&
exec git merge-recursive "\$@"
EOF
chmod +x test-bin/git-merge-funny &&
(
PATH=./test-bin:$PATH &&
test_must_fail git rebase -i -s funny -Xopt -Xfoo main topic
) &&
test -f funny.was.run &&
rm funny.was.run &&
echo "Resolved" >F2 &&
git add F2 &&
(
PATH=./test-bin:$PATH &&
git rebase --continue
) &&
test -f funny.was.run
'
test_expect_success REBASE_P 'rebase passes merge strategy options correctly' '
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F3-on-topic-branch &&
test_commit theirs-to-merge &&
git reset --hard HEAD^ &&
test_commit some-commit &&
test_tick &&
git merge --no-ff theirs-to-merge &&
FAKE_LINES="1 edit 2 3" git rebase -i -f -p -m \
-s recursive --strategy-option=theirs HEAD~2 &&
test_commit force-change &&
git rebase --continue
'
test_expect_success 'rebase -r passes merge strategy options correctly' '
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F3-on-topic-branch &&
test_commit merge-theirs &&
git reset --hard HEAD^ &&
test_commit some-other-commit &&
test_tick &&
git merge --no-ff merge-theirs &&
FAKE_LINES="1 3 edit 4 5 7 8 9" git rebase -i -f -r -m \
-s recursive --strategy-option=theirs HEAD~2 &&
test_commit force-change-ours &&
git rebase --continue
'
test_expect_success '--skip after failed fixup cleans commit message' '
test_when_finished "test_might_fail git rebase --abort" &&
git checkout -b with-conflicting-fixup &&
test_commit wants-fixup &&
test_commit "fixup! wants-fixup" wants-fixup.t 1 wants-fixup-1 &&
test_commit "fixup! wants-fixup" wants-fixup.t 2 wants-fixup-2 &&
test_commit "fixup! wants-fixup" wants-fixup.t 3 wants-fixup-3 &&
test_must_fail env FAKE_LINES="1 fixup 2 squash 4" \
git rebase -i HEAD~4 &&
: now there is a conflict, and comments in the commit message &&
git show HEAD >out &&
grep "fixup! wants-fixup" out &&
: skip and continue &&
echo "cp \"\$1\" .git/copy.txt" | write_script copy-editor.sh &&
(test_set_editor "$PWD/copy-editor.sh" && git rebase --skip) &&
: the user should not have had to edit the commit message &&
test_path_is_missing .git/copy.txt &&
: now the comments in the commit message should have been cleaned up &&
git show HEAD >out &&
! grep "fixup! wants-fixup" out &&
: now, let us ensure that "squash" is handled correctly &&
git reset --hard wants-fixup-3 &&
test_must_fail env FAKE_LINES="1 squash 4 squash 2 squash 4" \
git rebase -i HEAD~4 &&
: the first squash failed, but there are two more in the chain &&
(test_set_editor "$PWD/copy-editor.sh" &&
test_must_fail git rebase --skip) &&
: not the final squash, no need to edit the commit message &&
test_path_is_missing .git/copy.txt &&
: The first squash was skipped, therefore: &&
git show HEAD >out &&
test_i18ngrep "# This is a combination of 2 commits" out &&
test_i18ngrep "# This is the commit message #2:" out &&
(test_set_editor "$PWD/copy-editor.sh" && git rebase --skip) &&
git show HEAD >out &&
test_i18ngrep ! "# This is a combination" out &&
: Final squash failed, but there was still a squash &&
test_i18ngrep "# This is a combination of 2 commits" .git/copy.txt &&
test_i18ngrep "# This is the commit message #2:" .git/copy.txt
'
test_expect_success 'setup rerere database' '
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F3-on-topic-branch &&
git checkout main &&
test_commit "commit-new-file-F3" F3 3 &&
test_config rerere.enabled true &&
git update-ref refs/heads/topic commit-new-file-F3-on-topic-branch &&
test_must_fail git rebase -m main topic &&
echo "Resolved" >F2 &&
cp F2 expected-F2 &&
git add F2 &&
test_must_fail git rebase --continue &&
echo "Resolved" >F3 &&
cp F3 expected-F3 &&
git add F3 &&
git rebase --continue &&
git reset --hard topic@{1}
'
prepare () {
rm -fr .git/rebase-* &&
git reset --hard commit-new-file-F3-on-topic-branch &&
git checkout main &&
test_config rerere.enabled true
}
test_rerere_autoupdate () {
action=$1 &&
test_expect_success "rebase $action --continue remembers --rerere-autoupdate" '
prepare &&
test_must_fail git rebase $action --rerere-autoupdate main topic &&
test_cmp expected-F2 F2 &&
git diff-files --quiet &&
test_must_fail git rebase --continue &&
test_cmp expected-F3 F3 &&
git diff-files --quiet &&
git rebase --continue
'
test_expect_success "rebase $action --continue honors rerere.autoUpdate" '
prepare &&
test_config rerere.autoupdate true &&
test_must_fail git rebase $action main topic &&
test_cmp expected-F2 F2 &&
git diff-files --quiet &&
test_must_fail git rebase --continue &&
test_cmp expected-F3 F3 &&
git diff-files --quiet &&
git rebase --continue
'
test_expect_success "rebase $action --continue remembers --no-rerere-autoupdate" '
prepare &&
test_config rerere.autoupdate true &&
test_must_fail git rebase $action --no-rerere-autoupdate main topic &&
test_cmp expected-F2 F2 &&
test_must_fail git diff-files --quiet &&
git add F2 &&
test_must_fail git rebase --continue &&
test_cmp expected-F3 F3 &&
test_must_fail git diff-files --quiet &&
git add F3 &&
git rebase --continue
'
}
test_rerere_autoupdate
test_rerere_autoupdate -m
GIT_SEQUENCE_EDITOR=: && export GIT_SEQUENCE_EDITOR
test_rerere_autoupdate -i
test_have_prereq !REBASE_P || test_rerere_autoupdate --preserve-merges
unset GIT_SEQUENCE_EDITOR
test_expect_success 'the todo command "break" works' '
rm -f execed &&
FAKE_LINES="break b exec_>execed" git rebase -i HEAD &&
test_path_is_missing execed &&
git rebase --continue &&
test_path_is_missing execed &&
git rebase --continue &&
test_path_is_file execed
'
test_expect_success '--reschedule-failed-exec' '
test_when_finished "git rebase --abort" &&
test_must_fail git rebase -x false --reschedule-failed-exec HEAD^ &&
grep "^exec false" .git/rebase-merge/git-rebase-todo &&
git rebase --abort &&
test_must_fail git -c rebase.rescheduleFailedExec=true \
rebase -x false HEAD^ 2>err &&
grep "^exec false" .git/rebase-merge/git-rebase-todo &&
test_i18ngrep "has been rescheduled" err
'
test_expect_success 'rebase.rescheduleFailedExec only affects `rebase -i`' '
test_config rebase.rescheduleFailedExec true &&
test_must_fail git rebase -x false HEAD^ &&
grep "^exec false" .git/rebase-merge/git-rebase-todo &&
git rebase --abort &&
git rebase HEAD^
'
test_expect_success 'rebase.rescheduleFailedExec=true & --no-reschedule-failed-exec' '
test_when_finished "git rebase --abort" &&
test_config rebase.rescheduleFailedExec true &&
test_must_fail git rebase -x false --no-reschedule-failed-exec HEAD~2 &&
test_must_fail git rebase --continue 2>err &&
! grep "has been rescheduled" err
'
test_expect_success 'new rebase.rescheduleFailedExec=true setting in an ongoing rebase is ignored' '
test_when_finished "git rebase --abort" &&
test_must_fail git rebase -x false HEAD~2 &&
test_config rebase.rescheduleFailedExec true &&
test_must_fail git rebase --continue 2>err &&
! grep "has been rescheduled" err
'
test_expect_success 'there is no --no-reschedule-failed-exec in an ongoing rebase' '
test_when_finished "git rebase --abort" &&
test_must_fail git rebase -x false HEAD~2 &&
test_expect_code 129 git rebase --continue --no-reschedule-failed-exec &&
test_expect_code 129 git rebase --edit-todo --no-reschedule-failed-exec
'
test_done