1 files changed, 15 insertions, 0 deletions
diff --git a/shallow.c b/shallow.c
index cdf37d694d..f2c04b28dc 100644
--- a/shallow.c
+++ b/shallow.c
@@ -220,3 +220,18 @@ void setup_alternate_shallow(struct lock_file *shallow_lock,
 		*alternate_shallow_file = "";
 	strbuf_release(&sb);
 }
+
+static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
+{
+	int fd = *(int *)cb;
+	if (graft->nr_parent == -1)
+		packet_write(fd, "shallow %s\n", sha1_to_hex(graft->sha1));
+	return 0;
+}
+
+void advertise_shallow_grafts(int fd)
+{
+	if (!is_repository_shallow())
+		return;
+	for_each_commit_graft(advertise_shallow_grafts_cb, &fd);
+}