new include scheme.

Check.hs

@@ -1,6 +1,7 @@
 module Check (checkSyntax) where
 
 import Bag
+import Cabal
 import Control.Applicative
 import Data.IORef
 import ErrUtils
@@ -9,9 +10,9 @@ import FastString
 import GHC
 import HscTypes
 import Outputable hiding (showSDoc)
+import Prelude hiding (catch)
 import Pretty
 import Types
-import Prelude hiding (catch)
 
 ----------------------------------------------------------------
 
@@ -23,12 +24,24 @@ checkSyntax _ file = unlines <$> check file
 check :: String -> IO [String]
 check fileName = withGHC $ do
     ref <- newRef []
-    initSession ["-Wall","-fno-warn-unused-do-bind"]
-    setTargetFile fileName
+    (owdir,mdirfile) <- getDirs
+    case mdirfile of
+        Nothing -> do
+            initSession options Nothing
+            setTargetFile fileName
+        Just (cdir,cfile) -> do
+            midirs <- parseCabalFile cfile
+            changeToCabalDirectory cdir
+            let idirs = case midirs of
+                    Nothing   -> [cdir,owdir]
+                    Just dirs -> dirs ++ [owdir]
+            initSession options (Just idirs)
+            setTargetFile (ajustFileName fileName owdir cdir)
     loadWithLogger (refLogger ref) LoadAllTargets `gcatch` handleParseError ref
     clearWarnings
     readRef ref
   where
+    options = ["-Wall","-fno-warn-unused-do-bind"]
     handleParseError ref e = do
         liftIO . writeIORef ref $ errBagToStrList . srcErrorMessages $ e
         return Succeeded

Info.hs

@@ -71,12 +71,12 @@ inModuleContext :: FilePath -> ModuleString -> Ghc String -> IO String
 inModuleContext fileName modstr action = withGHC valid
   where
     valid = do
-        initSession ["-w"]
+        initSession ["-w"] Nothing
         setTargetFile fileName
         loadWithLogger (\_ -> return ()) LoadAllTargets
         mif setContextFromTarget action invalid
     invalid = do
-        initSession ["-w"]
+        initSession ["-w"] Nothing
         setTargetBuffer
         loadWithLogger defaultWarnErrLogger LoadAllTargets
         mif setContextFromTarget action (return errorMessage)

Types.hs

@@ -25,27 +25,23 @@ withGHC body = ghandle ignore $ runGhc (Just libdir) body
 initSession0 :: Ghc [PackageId]
 initSession0 = getSessionDynFlags >>= setSessionDynFlags
 
-initSession :: [String] -> Ghc [PackageId]
-initSession cmdOpts = do
+initSession :: [String] -> Maybe [FilePath] -> Ghc [PackageId]
+initSession cmdOpts midirs = do
     dflags <- getSessionDynFlags
     let opts = map noLoc cmdOpts
     (dflags',_,_) <- parseDynamicFlags dflags opts
-    setSessionDynFlags $ setFlags dflags'
+    setSessionDynFlags $ setFlags dflags' midirs
 
 ----------------------------------------------------------------
 
-setFlags :: DynFlags -> DynFlags
-setFlags d = d {
-    importPaths = importPaths d ++ importDirs
-  , packageFlags = ghcPackage : packageFlags d
-  , ghcLink = NoLink
--- GHC.desugarModule does not produces the pattern warnings, why?
---  , hscTarget = HscNothing
-  , hscTarget = HscInterpreted
-  }
-
-importDirs :: [String]
-importDirs = ["..","../..","../../..","../../../..","../../../../.."]
+setFlags :: DynFlags -> Maybe [FilePath] -> DynFlags
+setFlags d midirs = maybe d' (\x -> d' { importPaths = x }) midirs
+  where
+    d' = d {
+        packageFlags = ghcPackage : packageFlags d
+      , ghcLink = NoLink
+      , hscTarget = HscInterpreted
+      }
 
 ghcPackage :: PackageFlag
 ghcPackage = ExposePackage "ghc"

ghc-mod.cabal

@@ -23,14 +23,15 @@ Data-Files:             Makefile ghc.el ghc-func.el ghc-doc.el ghc-comp.el
                         ghc-flymake.el ghc-command.el ghc-info.el
 Executable ghc-mod
   Main-Is:              GHCMod.hs
-  Other-Modules:        List Browse Check Info Lang Lint Types
+  Other-Modules:        List Browse Cabal Check Info Lang Lint Types
   if impl(ghc >= 6.12)
     GHC-Options:        -Wall -fno-warn-unused-do-bind
   else
     GHC-Options:        -Wall
-  Build-Depends:        base >= 4.0 && < 5, ghc, ghc-paths,
+  Build-Depends:        base >= 4.0 && < 5, ghc, ghc-paths, transformers,
                         process, directory, filepath, old-time,
-                        hlint >= 1.7.1
+                        hlint >= 1.7.1,
+                        attoparsec, enumerator, attoparsec-enumerator
 Source-Repository head
   Type:                 git
   Location:             git://github.com/kazu-yamamoto/ghc-mod.git