Fix build on case-insensitive filesystems (#873)

GhcModExe/Check.hs

@@ -0,0 +1,57 @@
+module GhcModExe.Check (
+    checkSyntax
+  , check
+  , expandTemplate
+  , expand
+  ) where
+
+import Control.Applicative
+import Prelude
+import Language.Haskell.GhcMod.DynFlags
+import qualified Language.Haskell.GhcMod.Gap as Gap
+import Language.Haskell.GhcMod.Logger
+import Language.Haskell.GhcMod.Monad
+
+----------------------------------------------------------------
+
+-- | Checking syntax of a target file using GHC.
+--   Warnings and errors are returned.
+checkSyntax :: IOish m
+            => [FilePath]  -- ^ The target files.
+            -> GhcModT m String
+checkSyntax []    = return ""
+checkSyntax files = either id id <$> check files
+
+----------------------------------------------------------------
+
+-- | Checking syntax of a target file using GHC.
+--   Warnings and errors are returned.
+check :: IOish m
+      => [FilePath]  -- ^ The target files.
+      -> GhcModT m (Either String String)
+check files =
+    runGmlTWith
+      (map Left files)
+      return
+      ((fmap fst <$>) . withLogger Gap.setNoMaxRelevantBindings)
+      (return ())
+
+----------------------------------------------------------------
+
+-- | Expanding Haskell Template.
+expandTemplate :: IOish m
+               => [FilePath]  -- ^ The target files.
+               -> GhcModT m String
+expandTemplate []    = return ""
+expandTemplate files = either id id <$> expand files
+
+----------------------------------------------------------------
+
+-- | Expanding Haskell Template.
+expand :: IOish m => [FilePath] -> GhcModT m (Either String String)
+expand files =
+    runGmlTWith
+      (map Left files)
+      return
+      ((fmap fst <$>) . withLogger (Gap.setDumpSplices . setNoWarningFlags))
+      (return ())