Merge branch 'jn/maint-sequencer-fixes' into maint

* jn/maint-sequencer-fixes:
  revert: stop creating and removing sequencer-old directory
  Revert "reset: Make reset remove the sequencer state"
  revert: do not remove state until sequence is finished
  revert: allow single-pick in the middle of cherry-pick sequence
  revert: pass around rev-list args in already-parsed form
  revert: allow cherry-pick --continue to commit before resuming
  revert: give --continue handling its own function

2 files changed, 156 insertions, 58 deletions

diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 2c4c1c851d..e80050e1fe 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -2,6 +2,7 @@
 
 test_description='Test cherry-pick continuation features
 
+ +  conflicting: rewrites unrelated to conflicting
   + yetanotherpick: rewrites foo to e
   + anotherpick: rewrites foo to d
   + picked: rewrites foo to c
@@ -27,6 +28,7 @@ test_cmp_rev () {
 }
 
 test_expect_success setup '
+	git config advice.detachedhead false
 	echo unrelated >unrelated &&
 	git add unrelated &&
 	test_commit initial foo a &&
@@ -35,8 +37,8 @@ test_expect_success setup '
 	test_commit picked foo c &&
 	test_commit anotherpick foo d &&
 	test_commit yetanotherpick foo e &&
-	git config advice.detachedhead false
-
+	pristine_detach initial &&
+	test_commit conflicting unrelated
 '
 
 test_expect_success 'cherry-pick persists data on failure' '
@@ -48,6 +50,18 @@ test_expect_success 'cherry-pick persists data on failure' '
 	test_path_is_file .git/sequencer/opts
 '
 
+test_expect_success 'cherry-pick mid-cherry-pick-sequence' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick base..anotherpick &&
+	test_cmp_rev picked CHERRY_PICK_HEAD &&
+	# "oops, I forgot that these patches rely on the change from base"
+	git checkout HEAD foo &&
+	git cherry-pick base &&
+	git cherry-pick picked &&
+	git cherry-pick --continue &&
+	git diff --exit-code anotherpick
+'
+
 test_expect_success 'cherry-pick persists opts correctly' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick -s -m 1 --strategy=recursive -X patience -X ours base..anotherpick &&
@@ -189,10 +203,10 @@ test_expect_success '--abort refuses to clobber unrelated change, harder case' '
 	test_cmp_rev initial HEAD
 '
 
-test_expect_success 'cherry-pick cleans up sequencer state when one commit is left' '
+test_expect_success 'cherry-pick still writes sequencer state when one commit is left' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick base..picked &&
-	test_path_is_missing .git/sequencer &&
+	test_path_is_dir .git/sequencer &&
 	echo "resolved" >foo &&
 	git add foo &&
 	git commit &&
@@ -213,7 +227,7 @@ test_expect_success 'cherry-pick cleans up sequencer state when one commit is le
 	test_cmp expect actual
 '
 
-test_expect_failure '--abort after last commit in sequence' '
+test_expect_success '--abort after last commit in sequence' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick base..picked &&
 	git cherry-pick --abort &&
@@ -243,7 +257,66 @@ test_expect_success '--continue complains when there are unresolved conflicts' '
 	test_must_fail git cherry-pick --continue
 '
 
-test_expect_success '--continue continues after conflicts are resolved' '
+test_expect_success '--continue of single cherry-pick' '
+	pristine_detach initial &&
+	echo c >expect &&
+	test_must_fail git cherry-pick picked &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+
+	test_cmp expect foo &&
+	test_cmp_rev initial HEAD^ &&
+	git diff --exit-code HEAD &&
+	test_must_fail git rev-parse --verify CHERRY_PICK_HEAD
+'
+
+test_expect_success '--continue of single revert' '
+	pristine_detach initial &&
+	echo resolved >expect &&
+	echo "Revert \"picked\"" >expect.msg &&
+	test_must_fail git revert picked &&
+	echo resolved >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+
+	git diff --exit-code HEAD &&
+	test_cmp expect foo &&
+	test_cmp_rev initial HEAD^ &&
+	git diff-tree -s --pretty=tformat:%s HEAD >msg &&
+	test_cmp expect.msg msg &&
+	test_must_fail git rev-parse --verify CHERRY_PICK_HEAD &&
+	test_must_fail git rev-parse --verify REVERT_HEAD
+'
+
+test_expect_success '--continue after resolving conflicts' '
+	pristine_detach initial &&
+	echo d >expect &&
+	cat >expect.log <<-\EOF &&
+	OBJID
+	:100644 100644 OBJID OBJID M	foo
+	OBJID
+	:100644 100644 OBJID OBJID M	foo
+	OBJID
+	:100644 100644 OBJID OBJID M	unrelated
+	OBJID
+	:000000 100644 OBJID OBJID A	foo
+	:000000 100644 OBJID OBJID A	unrelated
+	EOF
+	test_must_fail git cherry-pick base..anotherpick &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+	{
+		git rev-list HEAD |
+		git diff-tree --root --stdin |
+		sed "s/$_x40/OBJID/g"
+	} >actual.log &&
+	test_cmp expect foo &&
+	test_cmp expect.log actual.log
+'
+
+test_expect_success '--continue after resolving conflicts and committing' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick base..anotherpick &&
 	echo "c" >foo &&
@@ -270,6 +343,29 @@ test_expect_success '--continue continues after conflicts are resolved' '
 	test_cmp expect actual
 '
 
+test_expect_success '--continue asks for help after resolving patch to nil' '
+	pristine_detach conflicting &&
+	test_must_fail git cherry-pick initial..picked &&
+
+	test_cmp_rev unrelatedpick CHERRY_PICK_HEAD &&
+	git checkout HEAD -- unrelated &&
+	test_must_fail git cherry-pick --continue 2>msg &&
+	test_i18ngrep "The previous cherry-pick is now empty" msg
+'
+
+test_expect_success 'follow advice and skip nil patch' '
+	pristine_detach conflicting &&
+	test_must_fail git cherry-pick initial..picked &&
+
+	git checkout HEAD -- unrelated &&
+	test_must_fail git cherry-pick --continue &&
+	git reset &&
+	git cherry-pick --continue &&
+
+	git rev-list initial..HEAD >commits &&
+	test_line_count = 3 commits
+'
+
 test_expect_success '--continue respects opts' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick -x base..anotherpick &&
@@ -288,6 +384,29 @@ test_expect_success '--continue respects opts' '
 	grep "cherry picked from" anotherpick_msg
 '
 
+test_expect_success '--continue of single-pick respects -x' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick -x picked &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+	test_path_is_missing .git/sequencer &&
+	git cat-file commit HEAD >msg &&
+	grep "cherry picked from" msg
+'
+
+test_expect_success '--continue respects -x in first commit in multi-pick' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick -x picked anotherpick &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+	test_path_is_missing .git/sequencer &&
+	git cat-file commit HEAD^ >msg &&
+	picked=$(git rev-parse --verify picked) &&
+	grep "cherry picked from.*$picked" msg
+'
+
 test_expect_success '--signoff is not automatically propagated to resolved conflict' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick --signoff base..anotherpick &&
@@ -306,6 +425,32 @@ test_expect_success '--signoff is not automatically propagated to resolved confl
 	grep "Signed-off-by:" anotherpick_msg
 '
 
+test_expect_success '--signoff dropped for implicit commit of resolution, multi-pick case' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick -s picked anotherpick &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+
+	git diff --exit-code HEAD &&
+	test_cmp_rev initial HEAD^^ &&
+	git cat-file commit HEAD^ >msg &&
+	! grep Signed-off-by: msg
+'
+
+test_expect_success 'sign-off needs to be reaffirmed after conflict resolution, single-pick case' '
+	pristine_detach initial &&
+	test_must_fail git cherry-pick -s picked &&
+	echo c >foo &&
+	git add foo &&
+	git cherry-pick --continue &&
+
+	git diff --exit-code HEAD &&
+	test_cmp_rev initial HEAD^ &&
+	git cat-file commit HEAD >msg &&
+	! grep Signed-off-by: msg
+'
+
 test_expect_success 'malformed instruction sheet 1' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick base..anotherpick &&
@@ -328,4 +473,9 @@ test_expect_success 'malformed instruction sheet 2' '
 	test_must_fail git cherry-pick --continue
 '
 
+test_expect_success 'empty commit set' '
+	pristine_detach initial &&
+	test_expect_code 128 git cherry-pick base..base
+'
+
 test_done
diff --git a/t/t7106-reset-sequence.sh b/t/t7106-reset-sequence.sh
deleted file mode 100755
index 83f7ea59c9..0000000000
--- a/t/t7106-reset-sequence.sh
+++ /dev/null
@@ -1,52 +0,0 @@
-#!/bin/sh
-
-test_description='Test interaction of reset --hard with sequencer
-
-  + anotherpick: rewrites foo to d
-  + picked: rewrites foo to c
-  + unrelatedpick: rewrites unrelated to reallyunrelated
-  + base: rewrites foo to b
-  + initial: writes foo as a, unrelated as unrelated
-'
-
-. ./test-lib.sh
-
-pristine_detach () {
-	git cherry-pick --quit &&
-	git checkout -f "$1^0" &&
-	git read-tree -u --reset HEAD &&
-	git clean -d -f -f -q -x
-}
-
-test_expect_success setup '
-	echo unrelated >unrelated &&
-	git add unrelated &&
-	test_commit initial foo a &&
-	test_commit base foo b &&
-	test_commit unrelatedpick unrelated reallyunrelated &&
-	test_commit picked foo c &&
-	test_commit anotherpick foo d &&
-	git config advice.detachedhead false
-
-'
-
-test_expect_success 'reset --hard cleans up sequencer state, providing one-level undo' '
-	pristine_detach initial &&
-	test_must_fail git cherry-pick base..anotherpick &&
-	test_path_is_dir .git/sequencer &&
-	git reset --hard &&
-	test_path_is_missing .git/sequencer &&
-	test_path_is_dir .git/sequencer-old &&
-	git reset --hard &&
-	test_path_is_missing .git/sequencer-old
-'
-
-test_expect_success 'cherry-pick --abort does not leave sequencer-old dir' '
-	pristine_detach initial &&
-	test_must_fail git cherry-pick base..anotherpick &&
-	git cherry-pick --abort &&
-	test_path_is_missing .git/sequencer &&
-	test_path_is_missing .git/sequencer-old
-'
-
-test_done