[PATCH] sequencer: fix cleanup with --signoff and -x

[Phillip Wood <phillip.wood123@gmail.com>]

From: Phillip Wood <phillip.wood@dunelm.org.uk>

Before commit 356ee4659b ("sequencer: try to commit without forking 'git
commit'", 2017-11-24) when --signoff or -x were given on the command
line the commit message was cleaned up with --cleanup=space or
commit.cleanup if it was set. Unfortunately this behavior was lost when
I implemented committing without forking. Fix this and add some tests to
catch future regressions.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
---

This clashes with dl/merge-cleanup-scissors-fix, I've sent some
rebased patches to Denton and he's going to send a re-roll based on
those.

 sequencer.c              | 24 +++++++++++++++++-------
 sequencer.h              |  1 +
 t/t3511-cherry-pick-x.sh | 20 ++++++++++++++++++++
 3 files changed, 38 insertions(+), 7 deletions(-)

diff --git a/sequencer.c b/sequencer.c
index 0db410d590..15457bbe71 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -172,17 +172,22 @@ static int git_sequencer_config(const char *k, const char *v, void *cb)
 		if (status)
 			return status;
 
-		if (!strcmp(s, "verbatim"))
+		if (!strcmp(s, "verbatim")) {
 			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_NONE;
-		else if (!strcmp(s, "whitespace"))
+			opts->explicit_cleanup = 1;
+		} else if (!strcmp(s, "whitespace")) {
 			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
-		else if (!strcmp(s, "strip"))
+			opts->explicit_cleanup = 1;
+		} else if (!strcmp(s, "strip")) {
 			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_ALL;
-		else if (!strcmp(s, "scissors"))
+			opts->explicit_cleanup = 1;
+		} else if (!strcmp(s, "scissors")) {
 			opts->default_msg_cleanup = COMMIT_MSG_CLEANUP_SPACE;
-		else
+			opts->explicit_cleanup = 1;
+		} else {
 			warning(_("invalid commit message cleanup mode '%s'"),
 				  s);
+		}
 
 		free((char *)s);
 		return status;
@@ -1382,8 +1387,13 @@ static int try_to_commit(struct repository *r,
 		msg = &commit_msg;
 	}
 
-	cleanup = (flags & CLEANUP_MSG) ? COMMIT_MSG_CLEANUP_ALL :
-					  opts->default_msg_cleanup;
+	if (flags & CLEANUP_MSG)
+		cleanup = COMMIT_MSG_CLEANUP_ALL;
+	else if ((opts->signoff || opts->record_origin) &&
+		 !opts->explicit_cleanup)
+		cleanup = COMMIT_MSG_CLEANUP_SPACE;
+	else
+		cleanup = opts->default_msg_cleanup;
 
 	if (cleanup != COMMIT_MSG_CLEANUP_NONE)
 		strbuf_stripspace(msg, cleanup == COMMIT_MSG_CLEANUP_ALL);
diff --git a/sequencer.h b/sequencer.h
index 4d505b3590..82bc7a48d5 100644
--- a/sequencer.h
+++ b/sequencer.h
@@ -47,6 +47,7 @@ struct replay_opts {
 
 	char *gpg_sign;
 	enum commit_msg_cleanup_mode default_msg_cleanup;
+	int explicit_cleanup;
 
 	/* Merge strategy */
 	char *strategy;
diff --git a/t/t3511-cherry-pick-x.sh b/t/t3511-cherry-pick-x.sh
index 9888bf34b9..84a587daf3 100755
--- a/t/t3511-cherry-pick-x.sh
+++ b/t/t3511-cherry-pick-x.sh
@@ -298,4 +298,24 @@ test_expect_success 'cherry-pick preserves commit message' '
 	test_cmp expect actual
 '
 
+test_expect_success 'cherry-pick -x cleans commit message' '
+	pristine_detach initial &&
+	git cherry-pick -x mesg-unclean &&
+	git log -1 --pretty=format:%B >actual &&
+	printf "%s\n(cherry picked from commit %s)\n" \
+		"$mesg_unclean" $(git rev-parse mesg-unclean) |
+			git stripspace >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'cherry-pick -x respects commit.cleanup' '
+	pristine_detach initial &&
+	git -c commit.cleanup=strip cherry-pick -x mesg-unclean &&
+	git log -1 --pretty=format:%B >actual &&
+	printf "%s\n(cherry picked from commit %s)\n" \
+		"$mesg_unclean" $(git rev-parse mesg-unclean) |
+			git stripspace -s >expect &&
+	test_cmp expect actual
+'
+
 test_done
-- 
2.21.0