35 lines
1.4 KiB
Haskell
35 lines
1.4 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 (SrcLoc(..))
|
|
import System.IO
|
|
|
|
-- | 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
|
|
(flags, classify, hint) <- liftIO $ argsSettings $ optLintHlintOpts opt
|
|
hSrc <- liftIO $ openFile tempfile ReadMode
|
|
liftIO $ hSetEncoding hSrc (encoding flags)
|
|
res <- liftIO $ parseModuleEx flags file =<< Just `fmap` hGetContents hSrc
|
|
case res of
|
|
Right m -> pack . map show $ filter ((/=Ignore) . ideaSeverity) $ applyHints classify hint [m]
|
|
Left ParseError{parseErrorLocation=loc, parseErrorMessage=err} ->
|
|
return $ showSrcLoc loc ++ ":Error:" ++ err ++ "\n"
|
|
where
|
|
pack = convert' . map init -- init drops the last \n.
|
|
handler (SomeException e) = return $ checkErrorPrefix ++ show e ++ "\n"
|
|
showSrcLoc (SrcLoc f l c) = concat [f, ":", show l, ":", show c]
|