Function guess_remote_head

remote.c:2492–2544

}

struct ref *guess_remote_head(const struct ref *head,
			      const struct ref *refs,
			      unsigned flags)
{
	const struct ref *r;
	struct ref *list = NULL;
	struct ref **tail = &list;

	if (!head)
		return NULL;

	/*
	 * Some transports support directly peeking at
	 * where HEAD points; if that is the case, then
	 * we don't have to guess.
	 */
	if (head->symref)
		return copy_ref(find_ref_by_name(refs, head->symref));

	/* If a remote branch exists with the default branch name, let's use it. */
	if (!(flags & REMOTE_GUESS_HEAD_ALL)) {
		char *default_branch =
			repo_default_branch_name(the_repository,
						 flags & REMOTE_GUESS_HEAD_QUIET);
		char *ref = xstrfmt("refs/heads/%s", default_branch);

		r = find_ref_by_name(refs, ref);
		free(ref);
		free(default_branch);

		if (r && oideq(&r->old_oid, &head->old_oid))
			return copy_ref(r);

		/* Fall back to the hard-coded historical default */
		r = find_ref_by_name(refs, "refs/heads/master");
		if (r && oideq(&r->old_oid, &head->old_oid))
			return copy_ref(r);
	}

	/* Look for another ref that points there */
	for (r = refs; r; r = r->next) {
		if (r != head &&
		    starts_with(r->name, "refs/heads/") &&
		    oideq(&r->old_oid, &head->old_oid)) {
			*tail = copy_ref(r);
			tail = &((*tail)->next);
			if (!(flags & REMOTE_GUESS_HEAD_ALL))
				break;
		}
	}

	return list;
}

struct stale_heads_info {
	struct string_list *ref_names;