{- This file is part of Vervis.
 -
 - Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
 -
 - ♡ Copying is an act of love. Please copy, reuse and share.
 -
 - The author(s) have dedicated all copyright and related and neighboring
 - rights to this software to the public domain worldwide. This software is
 - distributed without any warranty.
 -
 - You should have received a copy of the CC0 Public Domain Dedication along
 - with this software. If not, see
 - <http://creativecommons.org/publicdomain/zero/1.0/>.
 -}

module Vervis
    ( subdirs
    )
where

import Data.Maybe (mapMaybe)
import System.Directory.Tree

subdirs :: FilePath -> IO [FilePath]
subdirs dir = do
    _base :/ tree <- buildL dir
    return $ case tree of
        Dir _ cs ->
            let dirName (Dir n _) = Just n
                dirName _         = Nothing
            in  mapMaybe dirName cs
        _ -> []