ghc-mod/Language/Haskell/GhcMod/Lint.hs
2014-07-15 12:10:18 +09:00

22 lines
745 B
Haskell

module Language.Haskell.GhcMod.Lint where
import Exception (ghandle)
import Control.Exception (SomeException(..))
import CoreMonad (liftIO)
import Language.Haskell.GhcMod.Logger (checkErrorPrefix)
import Language.Haskell.GhcMod.Convert
import Language.Haskell.GhcMod.Monad
import Language.Haskell.HLint (hlint)
-- | Checking syntax of a target file using hlint.
-- Warnings and errors are returned.
lint :: IOish m
=> FilePath -- ^ A target file.
-> GhcModT m String
lint file = do
opt <- options
ghandle handler . pack =<< (liftIO $ hlint $ file : "--quiet" : hlintOpts opt)
where
pack = convert' . map (init . show) -- init drops the last \n.
handler (SomeException e) = return $ checkErrorPrefix ++ show e ++ "\n"