ghc-mod/Language/Haskell/GhcMod/Lint.hs
Nikolay Yakimov 57a31c348d Use HLint3.hlint in Lint
Related: #826
2016-08-27 19:33:26 +03:00

31 lines
1.1 KiB
Haskell

module Language.Haskell.GhcMod.Lint where
import Exception (ghandle)
import Control.Exception (SomeException(..))
import Language.Haskell.GhcMod.Logger (checkErrorPrefix)
import Language.Haskell.GhcMod.Convert
import Language.Haskell.GhcMod.Types
import Language.Haskell.GhcMod.Monad
import Language.Haskell.HLint3
import Language.Haskell.GhcMod.Utils (withMappedFile)
import Language.Haskell.Exts.SrcLoc (SrcSpan(..))
-- | Checking syntax of a target file using hlint.
-- Warnings and errors are returned.
lint :: IOish m
=> LintOpts -- ^ Configuration parameters
-> FilePath -- ^ A target file.
-> GhcModT m String
lint opt file = ghandle handler $
withMappedFile file $ \tempfile -> do
res <- liftIO $ hlint $ "--quiet" : tempfile : optLintHlintOpts opt
pack . map (show . substFile file tempfile) $ res
where
pack = convert' . map init -- init drops the last \n.
handler (SomeException e) = return $ checkErrorPrefix ++ show e ++ "\n"
substFile orig temp idea
| srcSpanFilename (ideaSpan idea) == temp
= idea{ideaSpan=(ideaSpan idea){srcSpanFilename = orig}}
substFile _ _ idea = idea