HsDev.Util

Documentation

directoryContents :: FilePath -> IO [FilePath]

Get directory contents safely

traverseDirectory :: FilePath -> IO [FilePath]

Collect all file names in directory recursively

isParent :: FilePath -> FilePath -> Bool

Is one path parent of another

haskellSource :: FilePath -> Bool

Is haskell source?

cabalFile :: FilePath -> Bool

Is cabal file?

String utils

tab :: Int -> String -> String

Add N tabs to line

tabs :: Int -> String -> String

Add N tabs to multiline

trim :: String -> String

Trim string

split :: (a -> Bool) -> [a] -> [[a]]

Split list

Helper

(.::) :: FromJSON a => HashMap Text Value -> Text -> Parser a

Workaround, sometimes we get HM.lookup "foo" v == Nothing, but lookup "foo" (HM.toList v) == Just smth

(.::?) :: FromJSON a => HashMap Text Value -> Text -> Parser (Maybe a)

objectUnion :: Value -> Value -> Value

Union two JSON objects

Exceptions

liftException :: MonadCatchIO m => m a -> ErrorT String m a

Lift IO exception to ErrorT

liftExceptionM :: (MonadCatchIO m, Error e, MonadError e m) => m a -> m a

Lift IO exception to MonadError

liftIOErrors :: MonadCatchIO m => ErrorT String m a -> ErrorT String m a

Lift IO exceptions to ErrorT

eitherT :: (Monad m, Error e, MonadError e m) => Either String a -> m a

UTF-8

fromUtf8 :: ByteString -> String

toUtf8 :: String -> ByteString

IO

hGetLineBS :: Handle -> IO ByteString

logException :: String -> (String -> IO ()) -> IO () -> IO ()

logIO :: String -> (String -> IO ()) -> IO () -> IO ()

ignoreIO :: IO () -> IO ()