First attempt to add auto

Language/Haskell/GhcMod.hs

@@ -36,6 +36,7 @@ module Language.Haskell.GhcMod (
   , splits
   , sig
   , refine
+  , auto
   , modules
   , languages
   , flags

Language/Haskell/GhcMod/CaseSplit.hs

@@ -5,8 +5,7 @@ module Language.Haskell.GhcMod.CaseSplit (
   ) where
 
 import CoreMonad (liftIO)
-import Data.Function (on)
-import Data.List (find, intercalate, sortBy)
+import Data.List (find, intercalate)
 import Data.Maybe (isJust)
 import qualified Data.Text as T
 import qualified Data.Text.IO as T (readFile)
@@ -18,7 +17,7 @@ import Language.Haskell.GhcMod.Convert
 import qualified Language.Haskell.GhcMod.Gap as Gap
 import Language.Haskell.GhcMod.Monad
 import Language.Haskell.GhcMod.SrcUtils
-import Outputable (ppr, PprStyle)
+import Outputable (PprStyle)
 import qualified TyCon as Ty
 import qualified Type as Ty
 

Language/Haskell/GhcMod/FillSig.hs

@@ -3,6 +3,7 @@
 module Language.Haskell.GhcMod.FillSig (
     sig
   , refine
+  , auto
   ) where
 
 import Data.Char (isSymbol)
@@ -23,6 +24,7 @@ import qualified Type as Ty
 import qualified HsBinds as Ty
 import qualified Class as Ty
 import qualified Language.Haskell.Exts.Annotated as HE
+import Djinn.GHC
 
 ----------------------------------------------------------------
 -- INTIAL CODE FROM FUNCTION OR INSTANCE SIGNATURE
@@ -143,6 +145,7 @@ getSignatureFromHE file lineNo colNo = do
                    return $ HEFamSignature s Open name (map cleanTyVarBind tys)
                  HE.DataFamDecl (HE.SrcSpanInfo s _) _ (HE.DHead _ name tys) _ ->
                    return $ HEFamSignature s Open name (map cleanTyVarBind tys)
+                 _ -> fail ""
              _ -> Nothing
   where cleanTyVarBind (HE.KindedVar _ n _) = n
         cleanTyVarBind (HE.UnkindedVar _ n) = n
@@ -310,3 +313,26 @@ doParen True  s = if ' ' `elem` s then '(':s ++ ")" else s
 isSearchedVar :: Id -> G.HsExpr Id -> Bool
 isSearchedVar i (G.HsVar i2) = i == i2
 isSearchedVar _ _ = False
+
+
+----------------------------------------------------------------
+-- REFINE AUTOMATICALLY
+----------------------------------------------------------------
+
+auto :: IOish m
+     => FilePath     -- ^ A target file.
+     -> Int          -- ^ Line number.
+     -> Int          -- ^ Column number.
+     -> GhcModT m String
+auto file lineNo colNo = ghandle handler body
+  where
+    body = inModuleContext file $ \dflag style -> do
+        opt <- options
+        modSum <- Gap.fileModSummary file
+        p <- G.parseModule modSum
+        tcm@TypecheckedModule{tm_typechecked_source = tcs} <- G.typecheckModule p
+        whenFound' opt (findVar dflag style tcm tcs lineNo colNo) $ \(loc, _name, rty, paren) -> do
+          text:_ <- djinn False rty
+          return (fourInts loc, doParen paren text)
+            
+    handler (SomeException _) = emptyResult =<< options

ghc-mod.cabal

@@ -107,6 +107,7 @@ Library
                       , split
                       , haskell-src-exts
                       , text
+                      , djinn-ghc
   if impl(ghc >= 7.8)
     Build-Depends:      Cabal >= 1.18
   else
@@ -191,6 +192,7 @@ Test-Suite spec
                       , split
                       , haskell-src-exts
                       , text
+                      , djinn-ghc
   if impl(ghc >= 7.8)
     Build-Depends:      Cabal >= 1.18
   else

src/GHCMod.hs

@@ -41,6 +41,7 @@ usage =    progVersion
         ++ "\t ghc-mod split" ++ ghcOptHelp ++ "<HaskellFile> <module> <line-no> <column-no>\n"
         ++ "\t ghc-mod sig" ++ ghcOptHelp ++ "<HaskellFile> <module> <line-no> <column-no>\n"
         ++ "\t ghc-mod refine" ++ ghcOptHelp ++ "<HaskellFile> <module> <line-no> <column-no> <expression>\n"
+        ++ "\t ghc-mod auto" ++ ghcOptHelp ++ "<HaskellFile> <module> <line-no> <column-no>\n"
         ++ "\t ghc-mod find <symbol>\n"
         ++ "\t ghc-mod lint [-h opt] <HaskellFile>\n"
         ++ "\t ghc-mod root\n"
@@ -125,6 +126,7 @@ main = flip E.catches handlers $ do
       "split"   -> nArgs 4 $ splits cmdArg1 (read cmdArg3) (read cmdArg4)
       "sig"     -> nArgs 4 $ sig cmdArg1 (read cmdArg3) (read cmdArg4)
       "refine"  -> nArgs 5 $ refine cmdArg1 (read cmdArg3) (read cmdArg4) cmdArg5
+      "auto"    -> nArgs 4 $ auto cmdArg1 (read cmdArg3) (read cmdArg4)
       "find"    -> nArgs 1 $ findSymbol cmdArg1
       "lint"    -> nArgs 1 $ withFile lint cmdArg1
       "root"    -> rootInfo

src/GHCModi.hs

@@ -131,6 +131,7 @@ loop set mvar = do
         "split"  -> doSplit set arg
         "sig"    -> doSig set arg
         "refine" -> doRefine set arg
+        "auto"   -> doAuto set arg
         "boot"   -> bootIt set
         "browse" -> browseIt set arg
         "quit"   -> return ("quit", False, set)
@@ -271,6 +272,16 @@ doRefine set fileArg  = do
     ret <- refine file (read line) (read column) expr
     return (ret, True, set')
 
+doAuto :: IOish m
+       => Set FilePath
+       -> FilePath
+       -> GhcModT m (String, Bool, Set FilePath)
+doAuto set fileArg  = do
+    let [file, line, column] = words fileArg
+    set' <- newFileSet set file
+    ret <- auto file (read line) (read column)
+    return (ret, True, set')
+
 ----------------------------------------------------------------
 
 bootIt :: IOish m