ghc-mod list should take care of sandboxes

Language/Haskell/GhcMod/List.hs

@@ -1,6 +1,7 @@
 module Language.Haskell.GhcMod.List (listModules, listMods) where
 
 import Control.Applicative
+import Control.Monad (void)
 import Data.List
 import GHC
 import Language.Haskell.GhcMod.GHCApi
@@ -11,13 +12,13 @@ import UniqFM
 ----------------------------------------------------------------
 
 -- | Listing installed modules.
-listModules :: Options -> IO String
+listModules :: Options -> Cradle -> IO String
-listModules opt = convert opt . nub . sort <$> withGHCDummyFile (listMods opt)
+listModules opt cradle = convert opt . nub . sort <$> withGHCDummyFile (listMods opt cradle)
 
 -- | Listing installed modules.
-listMods :: Options -> Ghc [String]
+listMods :: Options -> Cradle -> Ghc [String]
-listMods opt = do
+listMods opt cradle = do
-    initializeFlags opt
+    void $ initializeFlagsWithCradle opt cradle [] False
     getExposedModules <$> getSessionDynFlags
   where
     getExposedModules = map moduleNameString

src/GHCMod.hs

@@ -97,7 +97,7 @@ main = flip catches handlers $ do
                         else throw (TooManyArguments cmdArg0)
     res <- case cmdArg0 of
       "browse" -> concat <$> mapM (browseModule opt) remainingArgs
-      "list"   -> listModules opt
+      "list"   -> listModules opt cradle
       "check"  -> checkSyntax opt cradle remainingArgs
       "expand" -> checkSyntax opt { expandSplice = True } cradle remainingArgs
       "debug"  -> nArgs 1 $ debugInfo opt cradle cmdArg1
@@ -107,7 +107,7 @@ main = flip catches handlers $ do
       "lang"   -> listLanguages opt
       "flag"   -> listFlags opt
       "boot"   -> do
-         mods  <- listModules opt
+         mods  <- listModules opt cradle
          langs <- listLanguages opt
          flags <- listFlags opt
          pre   <- concat <$> mapM (browseModule opt) preBrowsedModules

test/ListSpec.hs

@@ -8,5 +8,6 @@ spec :: Spec
 spec = do
     describe "listModules" $ do
         it "lists up module names" $ do
-            modules <- lines <$> listModules defaultOptions
+            cradle <- findCradle
+            modules <- lines <$> listModules defaultOptions cradle
             modules `shouldContain` ["Data.Map"]