Use new hlint API

Language/Haskell/GhcMod/Lint.hs

@@ -6,11 +6,10 @@ import Language.Haskell.GhcMod.Logger (checkErrorPrefix)
 import Language.Haskell.GhcMod.Convert
 import Language.Haskell.GhcMod.Types
 import Language.Haskell.GhcMod.Monad
-import Language.Haskell.HLint (hlint)
+import Language.Haskell.HLint3
 
 import Language.Haskell.GhcMod.Utils (withMappedFile)
-
-import Data.List (stripPrefix)
+import Language.Haskell.Exts.Pretty (prettyPrint)
 
 -- | Checking syntax of a target file using hlint.
 --   Warnings and errors are returned.
@@ -18,12 +17,14 @@ lint :: IOish m
      => LintOpts  -- ^ Configuration parameters
      -> FilePath  -- ^ A target file.
      -> GhcModT m String
-lint opt file =
-  withMappedFile file $ \tempfile ->
-        liftIO (hlint $ tempfile : "--quiet" : optLintHlintOpts opt)
-    >>= mapM (replaceFileName tempfile)
-    >>= ghandle handler . pack
- where
+lint opt file = ghandle handler $
+  withMappedFile file $ \tempfile -> do
+    (flags, classify, hint) <- liftIO $ argsSettings $ optLintHlintOpts opt
+    res <- liftIO $ parseModuleEx flags file =<< Just `fmap` readFile tempfile
+    case res of
+      Right m -> pack . map show $ applyHints classify hint [m]
+      Left ParseError{parseErrorLocation=loc, parseErrorMessage=err} ->
+        return $ prettyPrint loc ++ ":Error:" ++ err ++ "\n"
+  where
     pack = convert' . map init -- init drops the last \n.
     handler (SomeException e) = return $ checkErrorPrefix ++ show e ++ "\n"
-    replaceFileName fp s = return $ maybe (show s) (file++) $ stripPrefix fp (show s)

ghc-mod.cabal

@@ -167,7 +167,7 @@ Library
                       , ghc               < 7.11
                       , ghc-paths         < 0.2
                       , ghc-syb-utils     < 0.3
-                      , hlint             < 1.10 && >= 1.8.61
+                      , hlint             < 1.10 && >= 1.9.26
                       , monad-journal     < 0.8 && >= 0.4
                       , old-time          < 1.2
                       , pretty            < 1.2