Teach ahead-behind and serialized status to play nicely together

t/t7524-serialized-status.sh

@@ -137,4 +137,30 @@ test_expect_success 'verify serialized status handles path scopes' '
 	test_i18ncmp expect output
 '
 
+test_expect_success 'verify no-ahead-behind and serialized status integration' '
+	test_when_finished "rm serialized_status.dat new_change.txt output" &&
+	cat >expect <<-\EOF &&
+	# branch.oid 68d4a437ea4c2de65800f48c053d4d543b55c410
+	# branch.head alt_branch
+	# branch.upstream master
+	# branch.ab +1 -0
+	? expect
+	? serialized_status.dat
+	? untracked/
+	? untracked_1.txt
+	EOF
+
+	git checkout -b alt_branch master --track >/dev/null &&
+	touch alt_branch_changes.txt &&
+	git add alt_branch_changes.txt &&
+	test_tick &&
+	git commit -m"New commit on alt branch"  &&
+
+	git status --untracked-files=complete --ignored=matching --serialize >serialized_status.dat &&
+	touch new_change.txt &&
+
+	git -c status.aheadBehind=false status --porcelain=v2 --branch --ahead-behind --deserialize=serialized_status.dat >output &&
+	test_i18ncmp expect output
+'
+
 test_done

wt-status-deserialize.c

@@ -510,6 +510,7 @@ static int wt_deserialize_fd(const struct wt_status *cmd_s, struct wt_status *de
 	/* show_branch */
 	/* show_stash */
 	/* hints */
+	/* ahead_behind_flags */
 	if (cmd_s->detect_rename != des_s->detect_rename) {
 		trace_printf_key(&trace_deserialize, "reject: detect_rename");
 		return DESERIALIZE_ERR;
@@ -548,6 +549,7 @@ static int wt_deserialize_fd(const struct wt_status *cmd_s, struct wt_status *de
 	des_s->show_branch = cmd_s->show_branch;
 	des_s->show_stash = cmd_s->show_stash;
 	/* hints */
+	des_s->ahead_behind_flags = cmd_s->ahead_behind_flags;
 	des_s->status_format = cmd_s->status_format;
 	des_s->fp = cmd_s->fp;
 	if (cmd_s->prefix && *cmd_s->prefix)
@@ -556,7 +558,6 @@ static int wt_deserialize_fd(const struct wt_status *cmd_s, struct wt_status *de
 	return DESERIALIZE_OK;
 }
 
-
 /*
  * Read raw serialized status data from the given file
  *

wt-status-serialize.c

@@ -48,6 +48,7 @@ static void wt_serialize_v1_header(struct wt_status *s, int fd)
 	/* show_branch */
 	/* show_stash */
 	packet_write_fmt(fd, "hints %d\n", s->hints);
+	/* ahead_behind_flags */
 	packet_write_fmt(fd, "detect_rename %d\n", s->detect_rename);
 	packet_write_fmt(fd, "rename_score %d\n", s->rename_score);
 	packet_write_fmt(fd, "rename_limit %d\n", s->rename_limit);