Better BSPWM binding

hm_modules/bspwm.nix

@@ -1,11 +1,16 @@
 { pkgs, lib, ... }:
 
 let
+  xsetroot = "${pkgs.xorg.xsetroot}/bin/xsetroot";
   monitorPages = [ "Ⅰ" "Ⅱ" "Ⅲ" "Ⅳ" "Ⅴ" "Ⅵ" "Ⅶ" "Ⅷ" "Ⅸ" "Ⅹ" ];
   monitorPagesString = lib.strings.concatStringsSep " " monitorPages;
+  monitorSetupScript = pkgs.writeShellScript "monitorSetupScript" ''
+    autorand -c || true
+    for monitor in $(bspc query -M --names); do
+      bspc monitor $monitor -d ${monitorPagesString}
+    done
+  '';
   strPalette = pkgs.lib.rice.palette.toRGBHex pkgs.rice.colorPalette;
-  xrandr = "${pkgs.xorg.xrandr}/bin/xrandr";
-  xsetroot = "${pkgs.xorg.xsetroot}/bin/xsetroot";
 in
 {
   xsession.windowManager.bspwm = {
@@ -27,19 +32,12 @@ in
       "Zathura" = { state = "tiled"; };
       "Yad" = { state = "floating"; };
     };
-    extraConfig = ''
-      ${xsetroot} -solid black -cursor_name left_ptr
-      autorandr -c
-
-      for monitor in $(${xrandr} --listactivemonitors | cut -d " " -f 6); do
-        bspc monitor $monitor -d ${monitorPagesString}
-      done
-
-      systemctl --user restart \
-        polybar.service \
-        update-background.service
-    '';
-    startupPrograms = [ ];
+    startupPrograms = [
+      "${monitorSetupScript}" # Setup monitors
+      "systemctl --user restart polybar" # Restart polybar
+      "${xsetroot} -solid black -cursor_name left_ptr" # Set cursor
+      "${pkgs.update-background}/bin/update-background" # Set background
+    ];
   };
   services = {
     network-manager-applet.enable = true;