module Language.Haskell.LSP.Test.Compat where
import Data.Maybe
+import System.IO
#if MIN_VERSION_process(1,6,3)
-import System.Process hiding (getPid)
+-- We have to hide cleanupProcess for process-1.6.3.0
+-- cause it is in the public api for 1.6.3.0 versions
+-- shipped with ghc >= 8.6 and < 8.6.4
+import System.Process hiding (getPid, cleanupProcess)
+# if MIN_VERSION_process(1,6,4)
+import qualified System.Process (getPid, cleanupProcess)
+# else
+import Foreign.C.Error
+import GHC.IO.Exception ( IOErrorType(..), IOException(..) )
+
import qualified System.Process (getPid)
+import qualified Control.Exception as C
+# endif
#else
+import Control.Concurrent.MVar
+import Foreign.C.Error
+import GHC.IO.Exception ( IOErrorType(..), IOException(..) )
import System.Process
import System.Process.Internals
-import Control.Concurrent.MVar
+
+import qualified Control.Exception as C
#endif
#ifdef mingw32_HOST_OS
#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
#endif
_ -> return Nothing
#endif
+
+cleanupRunningProcess :: (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle) -> IO ()
+cleanupRunningProcess p@(_, _, _, ph) =
+ getProcessExitCode ph >>= maybe (cleanupProcess p) (const $ return ())
+
+cleanupProcess :: (Maybe Handle, Maybe Handle, Maybe Handle, ProcessHandle) -> IO ()
+#if MIN_VERSION_process(1,6,4)
+cleanupProcess = System.Process.cleanupProcess
+#else
+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 ()) (ignoreSigPipe . hClose) mb_stdin
+ maybe (return ()) hClose mb_stdout
+ maybe (return ()) hClose mb_stderr
+
+ return ()
+
+ignoreSigPipe :: IO () -> IO ()
+ignoreSigPipe = C.handle $ \e -> case e of
+ IOError { ioe_type = ResourceVanished
+ , ioe_errno = Just ioe }
+ | Errno ioe == ePIPE -> return ()
+ _ -> C.throwIO e
+#endif