Migrate the remaining parts of the exposed API to GhcMod a

Language/Haskell/GhcMod/Lint.hs

@@ -1,19 +1,21 @@
 module Language.Haskell.GhcMod.Lint where
 
-import Control.Applicative ((<$>))
-import Control.Exception (handle, SomeException(..))
+import Exception (ghandle)
+import Control.Exception (SomeException(..))
+import Control.Monad.Trans (liftIO)
 import Language.Haskell.GhcMod.Logger (checkErrorPrefix)
 import Language.Haskell.GhcMod.Convert
+import Language.Haskell.GhcMod.Monad
 import Language.Haskell.GhcMod.Types
 import Language.Haskell.HLint (hlint)
 
 -- | Checking syntax of a target file using hlint.
 --   Warnings and errors are returned.
-lintSyntax :: Options
-           -> FilePath  -- ^ A target file.
-           -> IO String
-lintSyntax opt file = handle handler $ pack <$> hlint (file : "--quiet" : hopts)
-  where
-    pack = convert opt . map (init . show) -- init drops the last \n.
-    hopts = hlintOpts opt
+lint :: FilePath  -- ^ A target file.
+     -> GhcMod 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"