int git_submodule_lookup()

in src/submodule.c [252:365]

• 87 lines of code
• 23 McCabe index (conditional complexity)

int git_submodule_lookup(
	git_submodule **out, /* NULL if user only wants to test existence */
	git_repository *repo,
	const char *name)    /* trailing slash is allowed */
{
	int error;
	unsigned int location;
	git_submodule *sm;

	assert(repo && name);

	if (repo->is_bare) {
		git_error_set(GIT_ERROR_SUBMODULE, "cannot get submodules without a working tree");
		return -1;
	}

	if (repo->submodule_cache != NULL) {
		if ((sm = git_strmap_get(repo->submodule_cache, name)) != NULL) {
			if (out) {
				*out = sm;
				GIT_REFCOUNT_INC(*out);
			}
			return 0;
		}
	}

	if ((error = submodule_alloc(&sm, repo, name)) < 0)
		return error;

	if ((error = git_submodule_reload(sm, false)) < 0) {
		git_submodule_free(sm);
		return error;
	}

	if ((error = git_submodule_location(&location, sm)) < 0) {
		git_submodule_free(sm);
		return error;
	}

	/* If it's not configured or we're looking by path  */
	if (location == 0 || location == GIT_SUBMODULE_STATUS_IN_WD) {
		git_config_backend *mods;
		const char *pattern = "submodule\\..*\\.path";
		git_buf path = GIT_BUF_INIT;
		fbp_data data = { NULL, NULL };

		git_buf_puts(&path, name);
		while (path.ptr[path.size-1] == '/') {
			path.ptr[--path.size] = '\0';
		}
		data.path = path.ptr;

		mods = open_gitmodules(repo, GITMODULES_EXISTING);

		if (mods)
			error = git_config_backend_foreach_match(mods, pattern, find_by_path, &data);

		git_config_backend_free(mods);

		if (error < 0) {
			git_submodule_free(sm);
			git_buf_dispose(&path);
			return error;
		}

		if (data.name) {
			git__free(sm->name);
			sm->name = data.name;
			sm->path = git_buf_detach(&path);

			/* Try to load again with the right name */
			if ((error = git_submodule_reload(sm, false)) < 0) {
				git_submodule_free(sm);
				return error;
			}
		}

		git_buf_dispose(&path);
	}

	if ((error = git_submodule_location(&location, sm)) < 0) {
		git_submodule_free(sm);
		return error;
	}

	/* If we still haven't found it, do the WD check */
	if (location == 0 || location == GIT_SUBMODULE_STATUS_IN_WD) {
		git_submodule_free(sm);
		error = GIT_ENOTFOUND;

		/* If it's not configured, we still check if there's a repo at the path */
		if (git_repository_workdir(repo)) {
			git_buf path = GIT_BUF_INIT;
			if (git_buf_join3(&path,
					  '/', git_repository_workdir(repo), name, DOT_GIT) < 0)
				return -1;

			if (git_path_exists(path.ptr))
				error = GIT_EEXISTS;

			git_buf_dispose(&path);
		}

		submodule_set_lookup_error(error, name);
		return error;
	}

	if (out)
		*out = sm;
	else
		git_submodule_free(sm);

	return 0;
}