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--- a/src/XMonad/Core.hs
+++ b/src/XMonad/Core.hs
@@ -48,6 +48,7 @@ import System.Posix.Types (ProcessID)
import System.Process
import System.Directory
import System.Exit
+import System.Environment (lookupEnv)
import Graphics.X11.Xlib
import Graphics.X11.Xlib.Extras (Event)
import Data.Typeable
@@ -463,6 +464,7 @@ recompile force = io $ do
err = base ++ ".errors"
src = base ++ ".hs"
lib = dir </> "lib"
+ ghc <- fromMaybe "ghc" <$> liftIO (lookupEnv "NIX_GHC")
libTs <- mapM getModTime . Prelude.filter isSource =<< allFiles lib
srcT <- getModTime src
binT <- getModTime bin
@@ -471,7 +473,7 @@ recompile force = io $ do
-- temporarily disable SIGCHLD ignoring:
uninstallSignalHandlers
status <- bracket (openFile err WriteMode) hClose $ \h ->
- waitForProcess =<< runProcess "ghc" ["--make", "xmonad.hs", "-i", "-ilib", "-fforce-recomp", "-main-is", "main", "-v0", "-o",binn] (Just dir)
+ waitForProcess =<< runProcess ghc ["--make", "xmonad.hs", "-i", "-ilib", "-fforce-recomp", "-main-is", "main", "-v0", "-o",binn] (Just dir)
Nothing Nothing Nothing (Just h)
-- re-enable SIGCHLD:
@@ -480,6 +482,7 @@ recompile force = io $ do
-- now, if it fails, run xmessage to let the user know:
when (status /= ExitSuccess) $ do
ghcErr <- readFile err
+ xmessage <- fromMaybe "xmessage" <$> liftIO (lookupEnv "XMONAD_XMESSAGE")
let msg = unlines $
["Error detected while loading xmonad configuration file: " ++ src]
++ lines (if null ghcErr then show status else ghcErr)
@@ -487,7 +490,7 @@ recompile force = io $ do
-- nb, the ordering of printing, then forking, is crucial due to
-- lazy evaluation
hPutStrLn stderr msg
- forkProcess $ executeFile "xmessage" True ["-default", "okay", msg] Nothing
+ forkProcess $ executeFile xmessage True ["-default", "okay", msg] Nothing
return ()
return (status == ExitSuccess)
else return True
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