Function submodule_to_gitdir

submodule.c:2702–2734

* Put the gitdir for a submodule (given relative to the main * repository worktree) into `buf`, or return -1 on error. */

 * repository worktree) into `buf`, or return -1 on error.
 */
int submodule_to_gitdir(struct repository *repo,
			struct strbuf *buf, const char *submodule)
{
	const struct submodule *sub;
	const char *git_dir;
	int ret = 0;

	if (validate_submodule_path(submodule) < 0)
		exit(128);

	strbuf_reset(buf);
	strbuf_addstr(buf, submodule);
	strbuf_complete(buf, '/');
	strbuf_addstr(buf, ".git");

	git_dir = read_gitfile(buf->buf);
	if (git_dir) {
		strbuf_reset(buf);
		strbuf_addstr(buf, git_dir);
	}
	if (!is_git_directory(buf->buf)) {
		sub = submodule_from_path(repo, null_oid(the_hash_algo), submodule);
		if (!sub) {
			ret = -1;
			goto cleanup;
		}
		strbuf_reset(buf);
		submodule_name_to_gitdir(buf, repo, sub->name);
	}

cleanup:
	return ret;
}

void submodule_name_to_gitdir(struct strbuf *buf, struct repository *r,
			      const char *submodule_name)