static int repo_init_directories()

in src/repository.c [1903:2033]
82 lines of code
35 McCabe index (conditional complexity)

static int repo_init_directories(
	git_buf *repo_path,
	git_buf *wd_path,
	const char *given_repo,
	git_repository_init_options *opts)
{
	int error = 0;
	bool is_bare, add_dotgit, has_dotgit, natural_wd;
	mode_t dirmode;

	/* There are three possible rules for what we are allowed to create:
	 * - MKPATH means anything we need
	 * - MKDIR means just the .git directory and its parent and the workdir
	 * - Neither means only the .git directory can be created
	 *
	 * There are 5 "segments" of path that we might need to deal with:
	 * 1. The .git directory
	 * 2. The parent of the .git directory
	 * 3. Everything above the parent of the .git directory
	 * 4. The working directory (often the same as #2)
	 * 5. Everything above the working directory (often the same as #3)
	 *
	 * For all directories created, we start with the init_mode value for
	 * permissions and then strip off bits in some cases:
	 *
	 * For MKPATH, we create #3 (and #5) paths without S_ISGID or S_IWOTH
	 * For MKPATH and MKDIR, we create #2 (and #4) without S_ISGID
	 * For all rules, we create #1 using the untouched init_mode
	 */

	/* set up repo path */

	is_bare = ((opts->flags & GIT_REPOSITORY_INIT_BARE) != 0);

	add_dotgit =
		(opts->flags & GIT_REPOSITORY_INIT_NO_DOTGIT_DIR) == 0 &&
		!is_bare &&
		git__suffixcmp(given_repo, "/" DOT_GIT) != 0 &&
		git__suffixcmp(given_repo, "/" GIT_DIR) != 0;

	if (git_buf_joinpath(repo_path, given_repo, add_dotgit ? GIT_DIR : "") < 0)
		return -1;

	has_dotgit = (git__suffixcmp(repo_path->ptr, "/" GIT_DIR) == 0);
	if (has_dotgit)
		opts->flags |= GIT_REPOSITORY_INIT__HAS_DOTGIT;

	/* set up workdir path */

	if (!is_bare) {
		if (opts->workdir_path) {
			if (git_path_join_unrooted(
					wd_path, opts->workdir_path, repo_path->ptr, NULL) < 0)
				return -1;
		} else if (has_dotgit) {
			if (git_path_dirname_r(wd_path, repo_path->ptr) < 0)
				return -1;
		} else {
			git_error_set(GIT_ERROR_REPOSITORY, "cannot pick working directory"
				" for non-bare repository that isn't a '.git' directory");
			return -1;
		}

		if (git_path_to_dir(wd_path) < 0)
			return -1;
	} else {
		git_buf_clear(wd_path);
	}

	natural_wd =
		has_dotgit &&
		wd_path->size > 0 &&
		wd_path->size + strlen(GIT_DIR) == repo_path->size &&
		memcmp(repo_path->ptr, wd_path->ptr, wd_path->size) == 0;
	if (natural_wd)
		opts->flags |= GIT_REPOSITORY_INIT__NATURAL_WD;

	/* create directories as needed / requested */

	dirmode = pick_dir_mode(opts);

	if ((opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0) {
		/* create path #5 */
		if (wd_path->size > 0 &&
			(error = mkdir_parent(wd_path, dirmode, false)) < 0)
			return error;

		/* create path #3 (if not the same as #5) */
		if (!natural_wd &&
			(error = mkdir_parent(repo_path, dirmode, has_dotgit)) < 0)
			return error;
	}

	if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
		(opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0)
	{
		/* create path #4 */
		if (wd_path->size > 0 &&
			(error = git_futils_mkdir(
				wd_path->ptr, dirmode & ~S_ISGID,
				GIT_MKDIR_VERIFY_DIR)) < 0)
			return error;

		/* create path #2 (if not the same as #4) */
		if (!natural_wd &&
			(error = git_futils_mkdir(
				repo_path->ptr, dirmode & ~S_ISGID,
				GIT_MKDIR_VERIFY_DIR | GIT_MKDIR_SKIP_LAST)) < 0)
			return error;
	}

	if ((opts->flags & GIT_REPOSITORY_INIT_MKDIR) != 0 ||
		(opts->flags & GIT_REPOSITORY_INIT_MKPATH) != 0 ||
		has_dotgit)
	{
		/* create path #1 */
		error = git_futils_mkdir(repo_path->ptr, dirmode,
			GIT_MKDIR_VERIFY_DIR | ((dirmode & S_ISGID) ? GIT_MKDIR_CHMOD : 0));
	}

	/* prettify both directories now that they are created */

	if (!error) {
		error = git_path_prettify_dir(repo_path, repo_path->ptr, NULL);

		if (!error && wd_path->size > 0)
			error = git_path_prettify_dir(wd_path, wd_path->ptr, NULL);
	}

	return error;
}