Fix conditionals for process-1.6.3.0

[lsp-test.git] / src / Language / Haskell / LSP / Test / Compat.hs

diff --git a/src/Language/Haskell/LSP/Test/Compat.hs b/src/Language/Haskell/LSP/Test/Compat.hs
index cd7de0885e31db77eabd2f5b5b289255bf44385e..a68f74158bb95baa85d5965556eecaf5689c1044 100644 (file)
--- a/src/Language/Haskell/LSP/Test/Compat.hs
+++ b/src/Language/Haskell/LSP/Test/Compat.hs
@@ -1,30 +1,81 @@
 {-# LANGUAGE CPP #-}
+-- For some reason ghc warns about not using
+-- Control.Monad.IO.Class but it's needed for
+-- MonadIO
+{-# OPTIONS_GHC -Wunused-imports #-}
 module Language.Haskell.LSP.Test.Compat where
 
-import Control.Concurrent.Chan
-import Control.Monad.IO.Class
-import Data.Conduit
+import Data.Maybe
+import System.IO
+
+#if MIN_VERSION_process(1,6,3)
+# if MIN_VERSION_process(1,6,4)
+import System.Process hiding (getPid, cleanupProcess)
+import qualified System.Process (getPid, cleanupProcess)
+# else
+import System.Process hiding (getPid)
+import qualified System.Process (getPid)
+# endif
+#else
+import System.Process
+import System.Process.Internals
+import Control.Concurrent.MVar
+#endif
 
 #ifdef mingw32_HOST_OS
+import qualified System.Win32.Process
+#else
+import qualified System.Posix.Process
+#endif
 
-import qualified System.Win32.Process as P (getCurrentProcessId)
-getProcessID :: IO Int
-getProcessID = fromIntegral <$> P.getCurrentProcessId
 
+getCurrentProcessID :: IO Int
+#ifdef mingw32_HOST_OS
+getCurrentProcessID = fromIntegral <$> System.Win32.Process.getCurrentProcessId
 #else
+getCurrentProcessID = fromIntegral <$> System.Posix.Process.getProcessID
+#endif
 
-import qualified System.Posix.Process as P (getProcessID)
-getProcessID :: IO Int
-getProcessID = fromIntegral <$> P.getProcessID
-
+getProcessID :: ProcessHandle -> IO Int
+getProcessID p = fromIntegral . fromJust <$> getProcessID' p
+  where
+#if MIN_VERSION_process(1,6,3)
+  getProcessID' = System.Process.getPid
+#else
+#if MIN_VERSION_process(1,6,0)
+  getProcessID' (ProcessHandle mh _ _) = do
+#else
+  getProcessID' (ProcessHandle mh _) = do
+#endif
+    p_ <- readMVar mh
+    case p_ of
+#ifdef mingw32_HOST_OS
+      OpenHandle h -> do
+        pid <- System.Win32.Process.getProcessId h
+        return $ Just pid
+#else
+      OpenHandle pid -> return $ Just pid
 #endif
+      _ -> return Nothing
+#endif
+
+cleanupRunningProcess :: (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle) -> IO ()
+cleanupRunningProcess p@(_, _, _, ph) =
+  getProcessExitCode ph >>= maybe (cleanupProcess p) (const $ return ())
 
-#if MIN_VERSION_conduit(1,3,0)
-chanSource :: MonadIO m => Chan o -> ConduitT i o m b
+cleanupProcess :: (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle) -> IO ()
+#if MIN_VERSION_process(1,6,4)
+cleanupProcess = System.Process.cleanupProcess
 #else
-chanSource :: MonadIO m => Chan o -> ConduitM i o m b
+cleanupProcess (mb_stdin, mb_stdout, mb_stderr, ph) = do
+
+    terminateProcess ph
+    -- Note, it's important that other threads that might be reading/writing
+    -- these handles also get killed off, since otherwise they might be holding
+    -- the handle lock and prevent us from closing, leading to deadlock.
+    maybe (return ()) hClose mb_stdin
+    maybe (return ()) hClose mb_stdout
+    maybe (return ()) hClose mb_stderr
+
+    return ()
 #endif
-chanSource c = do
-  x <- liftIO $ readChan c
-  yield x
-  chanSource c