Required files
pathname
facets/pathname/home
facets/pathname/null
facets/pathname/op_div
facets/pathname/op_fetch
facets/pathname/root
facets/pathname/work
facets/pathname/empty
facets/pathname/exists
facets/pathname/glob
facets/pathname/outofdate
facets/pathname/readline
facets/pathname/rootname
facets/pathname/safe
facets/pathname/split_root
facets/pathname/to_str
facets/pathname/uptodate
facets/pathname/visit
facets/pathname/to_path