l xephyrify: add minimal xmonad

lass/5pkgs/xephyrify/default.nix

@@ -1,9 +1,42 @@
-{ writeDashBin, coreutils, xorg, virtualgl, ... }:
+{ writeDashBin, writeHaskell, coreutils, xorg, virtualgl, ... }:
 
-writeDashBin "xephyrify" ''
+let
+
+  minimalXmonad = writeHaskell "minimalXmonad" {
+    executables.xmonad = {
+      extra-depends = [
+        "containers"
+        "xmonad"
+      ];
+      text = /* haskell */ ''
+        module Main where
+        import XMonad
+        import qualified Data.Map as Map
+
+        main :: IO ()
+        main = do
+          xmonad def
+            { workspaces = [ "1" ]
+            , layoutHook = myLayoutHook
+            , keys = myKeys
+            , normalBorderColor  = "#000000"
+            , focusedBorderColor = "#000000"
+            }
+
+        myLayoutHook = Full
+        myKeys _ = Map.fromList []
+      '';
+    };
+  };
+
+in writeDashBin "xephyrify" ''
   NDISPLAY=:$(${coreutils}/bin/shuf -i 100-65536 -n 1)
+  echo "using DISPLAY $NDISPLAY"
   ${xorg.xorgserver}/bin/Xephyr -br -ac -reset -terminate -resizeable $NDISPLAY &
   XEPHYR_PID=$!
+  DISPLAY=$NDISPLAY ${minimalXmonad}/bin/xmonad &
+  XMONAD_PID=$!
   DISPLAY=$NDISPLAY ${virtualgl}/bin/vglrun "$@"
+  kill $XMONAD_PID
   kill $XEPHYR_PID
 ''