debugging

1 files changed, 13 insertions, 0 deletions

diff --git a/src/System/Console/Concurrent/Internal.hs b/src/System/Console/Concurrent/Internal.hs
index 985bc130..5b9cf454 100644
--- a/src/System/Console/Concurrent/Internal.hs
+++ b/src/System/Console/Concurrent/Internal.hs
@@ -31,6 +31,7 @@ import qualified Data.Text as T
 import qualified Data.Text.IO as T
 import Control.Applicative
 import Prelude
+import System.Log.Logger
 
 import Utility.Monad
 import Utility.Exception
@@ -286,18 +287,30 @@ fgProcess p = do
 	r@(_, _, _, h) <- P.createProcess p
 		`onException` dropOutputLock
 	registerOutputThread
+	debug ["fgProcess", showProc p]
 	-- Wait for the process to exit and drop the lock.
 	asyncProcessWaiter $ do
 		void $ tryIO $ P.waitForProcess h
 		unregisterOutputThread
 		dropOutputLock
+		debug ["fgProcess done", showProc p]
 	return (toConcurrentProcessHandle r)
+	
+debug :: [String] -> IO ()
+debug = debugM "concurrent-output" . unwords
+
+showProc :: P.CreateProcess -> String
+showProc = go . P.cmdspec
+  where
+	go (P.ShellCommand s) = s
+	go (P.RawCommand c ps) = show (c, ps)
 
 #ifndef mingw32_HOST_OS
 bgProcess :: P.CreateProcess -> IO (Maybe Handle, Maybe Handle, Maybe Handle, ConcurrentProcessHandle)
 bgProcess p = do
 	(toouth, fromouth) <- pipe
 	(toerrh, fromerrh) <- pipe
+	debug ["bgProcess", showProc p]
 	let p' = p
 		{ P.std_out = rediroutput (P.std_out p) toouth
 		, P.std_err = rediroutput (P.std_err p) toerrh