static int _cp_r_callback()

in src/futils.c [967:1053]
63 lines of code
27 McCabe index (conditional complexity)

static int _cp_r_callback(void *ref, git_buf *from)
{
	int error = 0;
	cp_r_info *info = ref;
	struct stat from_st, to_st;
	bool exists = false;

	if ((info->flags & GIT_CPDIR_COPY_DOTFILES) == 0 &&
		from->ptr[git_path_basename_offset(from)] == '.')
		return 0;

	if ((error = git_buf_joinpath(
			&info->to, info->to_root, from->ptr + info->from_prefix)) < 0)
		return error;

	if (!(error = git_path_lstat(info->to.ptr, &to_st)))
		exists = true;
	else if (error != GIT_ENOTFOUND)
		return error;
	else {
		git_error_clear();
		error = 0;
	}

	if ((error = git_path_lstat(from->ptr, &from_st)) < 0)
		return error;

	if (S_ISDIR(from_st.st_mode)) {
		mode_t oldmode = info->dirmode;

		/* if we are not chmod'ing, then overwrite dirmode */
		if ((info->flags & GIT_CPDIR_CHMOD_DIRS) == 0)
			info->dirmode = from_st.st_mode;

		/* make directory now if CREATE_EMPTY_DIRS is requested and needed */
		if (!exists && (info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) != 0)
			error = _cp_r_mkdir(info, from);

		/* recurse onto target directory */
		if (!error && (!exists || S_ISDIR(to_st.st_mode)))
			error = git_path_direach(from, 0, _cp_r_callback, info);

		if (oldmode != 0)
			info->dirmode = oldmode;

		return error;
	}

	if (exists) {
		if ((info->flags & GIT_CPDIR_OVERWRITE) == 0)
			return 0;

		if (p_unlink(info->to.ptr) < 0) {
			git_error_set(GIT_ERROR_OS, "cannot overwrite existing file '%s'",
				info->to.ptr);
			return GIT_EEXISTS;
		}
	}

	/* Done if this isn't a regular file or a symlink */
	if (!S_ISREG(from_st.st_mode) &&
		(!S_ISLNK(from_st.st_mode) ||
		 (info->flags & GIT_CPDIR_COPY_SYMLINKS) == 0))
		return 0;

	/* Make container directory on demand if needed */
	if ((info->flags & GIT_CPDIR_CREATE_EMPTY_DIRS) == 0 &&
		(error = _cp_r_mkdir(info, from)) < 0)
		return error;

	/* make symlink or regular file */
	if (info->flags & GIT_CPDIR_LINK_FILES) {
		if ((error = p_link(from->ptr, info->to.ptr)) < 0)
			git_error_set(GIT_ERROR_OS, "failed to link '%s'", from->ptr);
	} else if (S_ISLNK(from_st.st_mode)) {
		error = cp_link(from->ptr, info->to.ptr, (size_t)from_st.st_size);
	} else {
		mode_t usemode = from_st.st_mode;

		if ((info->flags & GIT_CPDIR_SIMPLE_TO_MODE) != 0)
			usemode = GIT_PERMS_FOR_WRITE(usemode);

		error = git_futils_cp(from->ptr, info->to.ptr, usemode);
	}

	return error;
}