revision: convert prepare_show_merge to struct object_id

bk2204 · gitster · commit 68ab61dd099a · 2017-05-08T15:12:57.000+09:00
This is a caller of lookup_commit_or_die, which we will convert later
on.

Signed-off-by: brian m. carlson &lt;sandals@crustytoothpaste.net&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/revision.c b/revision.c
@@ -1389,16 +1389,16 @@ static void prepare_show_merge(struct rev_info *revs)
 {
 	struct commit_list *bases;
 	struct commit *head, *other;
-	unsigned char sha1[20];
+	struct object_id oid;
 	const char **prune = NULL;
 	int i, prune_num = 1; /* counting terminating NULL */
 
-	if (get_sha1("HEAD", sha1))
+	if (get_oid("HEAD", &oid))
 		die("--merge without HEAD?");
-	head = lookup_commit_or_die(sha1, "HEAD");
-	if (get_sha1("MERGE_HEAD", sha1))
+	head = lookup_commit_or_die(oid.hash, "HEAD");
+	if (get_oid("MERGE_HEAD", &oid))
 		die("--merge without MERGE_HEAD?");
-	other = lookup_commit_or_die(sha1, "MERGE_HEAD");
+	other = lookup_commit_or_die(oid.hash, "MERGE_HEAD");
 	add_pending_object(revs, &head->object, "HEAD");
 	add_pending_object(revs, &other->object, "MERGE_HEAD");
 	bases = get_merge_bases(head, other);
