add wayland-proxy-virtwl module

nixosModules/clanCore/wayland-proxy-virtwl.nix

@@ -0,0 +1,43 @@
+{ pkgs, config, lib, ... }:
+{
+  options = {
+    # maybe upstream this?
+    services.wayland-proxy-virtwl = {
+      enable = lib.mkEnableOption "wayland-proxy-virtwl";
+      package = lib.mkPackageOption pkgs "wayland-proxy-virtwl" { };
+    };
+  };
+  config = lib.mkIf config.services.wayland-proxy-virtwl.enable {
+    programs.xwayland.enable = lib.mkDefault true;
+    environment.etc."X11/xkb".source = config.services.xserver.xkb.dir;
+
+    environment.sessionVariables = {
+      WAYLAND_DISPLAY = "wayland-1";
+      DISPLAY = ":0";
+      QT_QPA_PLATFORM = "wayland"; # Qt Applications
+      GDK_BACKEND = "wayland"; # GTK Applications
+      XDG_SESSION_TYPE = "wayland"; # Electron Applications
+      SDL_VIDEODRIVER = "wayland";
+      CLUTTER_BACKEND = "wayland";
+    };
+
+    # Is there a better way to do this?
+    programs.bash.loginShellInit = ''
+      if [ "$(tty)" = "/dev/ttyS0" ]; then
+        systemctl --user start graphical-session.target
+      fi
+    '';
+
+    systemd.user.services.wayland-proxy-virtwl = {
+      description = "Wayland proxy for virtwl";
+      before = [ "graphical-session.target" ];
+      wantedBy = [ "graphical-session.target" ];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${config.services.wayland-proxy-virtwl.package}/bin/wayland-proxy-virtwl --virtio-gpu --x-display=0 --xwayland-binary=${pkgs.xwayland}/bin/Xwayland";
+        Restart = "always";
+        RestartSec = 5;
+      };
+    };
+  };
+}