commit: convert lookup_commit_graft to struct object_id

With this patch, commit.h doesn't contain the string 'sha1' any more.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

commit.c

@@ -199,11 +199,11 @@ static void prepare_commit_graft(void)
 	commit_graft_prepared = 1;
 }
 
-struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
+struct commit_graft *lookup_commit_graft(const struct object_id *oid)
 {
 	int pos;
 	prepare_commit_graft();
-	pos = commit_graft_pos(sha1);
+	pos = commit_graft_pos(oid->hash);
 	if (pos < 0)
 		return NULL;
 	return commit_graft[pos];
@@ -335,7 +335,7 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s
 	bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */
 	pptr = &item->parents;
 
-	graft = lookup_commit_graft(item->object.oid.hash);
+	graft = lookup_commit_graft(&item->object.oid);
 	while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) {
 		struct commit *new_parent;
 

commit.h

@@ -249,7 +249,7 @@ typedef int (*each_commit_graft_fn)(const struct commit_graft *, void *);
 
 struct commit_graft *read_graft_line(char *buf, int len);
 int register_commit_graft(struct commit_graft *, int);
-struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
+struct commit_graft *lookup_commit_graft(const struct object_id *oid);
 
 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);
 extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos);

fsck.c

@@ -736,7 +736,7 @@ static int fsck_commit_buffer(struct commit *commit, const char *buffer,
 		buffer += 41;
 		parent_line_count++;
 	}
-	graft = lookup_commit_graft(commit->object.oid.hash);
+	graft = lookup_commit_graft(&commit->object.oid);
 	parent_count = commit_list_count(commit->parents);
 	if (graft) {
 		if (graft->nr_parent == -1 && !parent_count)

shallow.c

@@ -107,7 +107,7 @@ struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
 		cur_depth++;
 		if ((depth != INFINITE_DEPTH && cur_depth >= depth) ||
 		    (is_repository_shallow() && !commit->parents &&
-		     (graft = lookup_commit_graft(commit->object.oid.hash)) != NULL &&
+		     (graft = lookup_commit_graft(&commit->object.oid)) != NULL &&
 		     graft->nr_parent < 0)) {
 			commit_list_insert(commit, &result);
 			commit->object.flags |= shallow_flag;
@@ -398,7 +398,7 @@ void prepare_shallow_info(struct shallow_info *info, struct oid_array *sa)
 	for (i = 0; i < sa->nr; i++) {
 		if (has_object_file(sa->oid + i)) {
 			struct commit_graft *graft;
-			graft = lookup_commit_graft(sa->oid[i].hash);
+			graft = lookup_commit_graft(&sa->oid[i]);
 			if (graft && graft->nr_parent < 0)
 				continue;
 			info->ours[info->nr_ours++] = i;