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module Test.Haddock.Utils where
import Control.Monad
import Data.Maybe
import System.Directory
import System.FilePath
mlast :: [a] -> Maybe a
mlast = listToMaybe . reverse
partitionM :: Monad m => (a -> m Bool) -> [a] -> m ([a], [a])
partitionM _ [] = pure ([], [])
partitionM p (x:xs) = do
(ss, fs) <- partitionM p xs
b <- p x
pure $ if b then (x:ss, fs) else (ss, x:fs)
whenM :: Monad m => m Bool -> m () -> m ()
whenM mb action = mb >>= \b -> when b action
getDirectoryTree :: FilePath -> IO [FilePath]
getDirectoryTree path = do
(dirs, files) <- partitionM isDirectory =<< contents
subfiles <- fmap concat . forM dirs $ \dir ->
map (dir </>) <$> getDirectoryTree (path </> dir)
pure $ files ++ subfiles
where
contents = filter realEntry <$> getDirectoryContents path
isDirectory entry = doesDirectoryExist $ path </> entry
realEntry entry = not $ entry == "." || entry == ".."
createEmptyDirectory :: FilePath -> IO ()
createEmptyDirectory path = do
whenM (doesDirectoryExist path) $ removeDirectoryRecursive path
createDirectory path
-- | Just like 'copyFile' but output directory path is not required to exist.
copyFile' :: FilePath -> FilePath -> IO ()
copyFile' old new = do
createDirectoryIfMissing True $ takeDirectory new
copyFile old new
crlfToLf :: String -> String
crlfToLf "" = ""
crlfToLf ('\r' : '\n' : rest) = '\n' : crlfToLf rest
crlfToLf ('\r' : rest) = '\n' : crlfToLf rest
crlfToLf (other : rest) = other : crlfToLf rest
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