fsx

type FileSystem interface {
	ReadDir(dirname string) ([]fs.DirEntry, error)
	ReadFile(filename string) ([]byte, error)
	Join(elem ...string) string

	// Base returns the last element of path.
	// Trailing path separators are removed before extracting the last element.
	// If the path is empty, Base returns ".".
	// If the path consists entirely of separators, Base returns a single separator.
	Base(filename string) string

	// Abs returns an absolute representation of path.
	Abs(path string) (string, error)
}