1 files changed, 23 insertions, 0 deletions
diff --git a/shallow.c b/shallow.c
index ec9179480f..3c36dd82bc 100644
--- a/shallow.c
+++ b/shallow.c
@@ -617,3 +617,26 @@ static void post_assign_shallow(struct shallow_info *info,
 
 	free(ca.commits);
 }
+
+/* (Delayed) step 7, reachability test at commit level */
+int delayed_reachability_test(struct shallow_info *si, int c)
+{
+	if (si->need_reachability_test[c]) {
+		struct commit *commit = lookup_commit(si->shallow->sha1[c]);
+
+		if (!si->commits) {
+			struct commit_array ca;
+			memset(&ca, 0, sizeof(ca));
+			head_ref(add_ref, &ca);
+			for_each_ref(add_ref, &ca);
+			si->commits = ca.commits;
+			si->nr_commits = ca.nr;
+		}
+
+		si->reachable[c] = in_merge_bases_many(commit,
+						       si->nr_commits,
+						       si->commits);
+		si->need_reachability_test[c] = 0;
+	}
+	return si->reachable[c];
+}