{-# 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 Data.Maybe
+
+#if MIN_VERSION_process(1,6,3)
+import System.Process hiding (getPid)
+import qualified System.Process (getPid)
+#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