Support for Elm and Haskell dependencies

tests/samples/codefiles/haskell.hs

@@ -0,0 +1,20 @@
+{-# OPTIONS_GHC -Wall #-}
+{-# LANGUAGE OverloadedStrings #-}
+module Socket (watchFile) where
+
+import Control.Concurrent (forkIO, threadDelay)
+import Control.Exception (SomeException, catch)
+import qualified Data.ByteString.Char8 as BS
+import qualified Network.WebSockets as WS
+import qualified System.FSNotify.Devel as Notify
+import qualified System.FSNotify as Notify
+
+
+watchFile :: FilePath -> WS.PendingConnection -> IO ()
+watchFile watchedFile pendingConnection =
+  do  connection <- WS.acceptRequest pendingConnection
+
+      Notify.withManager $ \mgmt ->
+        do  stop <- Notify.treeExtAny mgmt "." ".elm" print
+            tend connection
+            stop