Refactor back to a more modular configuration

modules/nixos/desktop/dwm/default.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+with lib;
+
+let
+  cfg = config.nixosModules.desktop.dwm;
+in
+{
+  options.nixosModules.desktop.dwm.enable = mkEnableOption "Enable dwm";
+
+  config = mkIf cfg.enable {
+    services = {
+      dwm-status = {
+        enable = true;
+
+        order = [
+          "audio"
+          "battery"
+          "network"
+          "time"
+        ];
+      };
+
+      xserver.windowManager.dwm.enable = true;
+    };
+
+    systemd.user.services.dwm-status.serviceConfig.Restart = "on-failure";
+
+    environment.systemPackages = with pkgs; [
+      dmenu
+      dmenu-bluetooth
+      dunst
+      networkmanager_dmenu
+      poweralertd
+      slock
+      xdotool
+      xwallpaper
+    ];
+
+    home-manager.users.opdavies =
+      { config, ... }:
+      {
+        home = {
+          file."${config.home.sessionVariables.XINITRC}".source = ./xinitrc;
+
+          sessionVariables = {
+            XINITRC = "${config.xdg.configHome}/X11/xinitrc";
+          };
+        };
+      };
+  };
+}