refactor: modularize hyprland and desktop environment configurations

hosts/callisto/configuration.nix

@@ -27,7 +27,7 @@
     theming = {
       enable = true;
     };
-    desktop.greeter.enable = true;
+    desktop.enable = true;
   };
 
   boot = {
@@ -200,9 +200,6 @@
 
   programs.dconf.enable = true;
 
-  programs.hyprland.enable = true;
-  # programs.hyprland.package = inputs.stablepkgs.legacyPackages.${pkgs.stdenv.hostPlatform.system}.hyprland;
-
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave

hosts/callisto/default.nix

@@ -12,7 +12,7 @@
       ../../modules/linux/fonts
       ../../modules/linux/greeter
       ../../modules/linux/core
-      ../../modules/linux/desktop-portal
+      ../../modules/linux/desktop-environment
       ../../modules/linux/stylix
       ../../overlays
       {

modules/linux/desktop-environment/default.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.liminalOS.desktop;
+in
+{
+  options.liminalOS.desktop = {
+    enable = lib.mkEnableOption "liminalOS desktop environment with Hyprland and other utilities";
+    hyprland.enable = lib.mkOption {
+      type = lib.types.bool;
+      default = cfg.enable;
+      description = ''
+        Whether to enable Hyprland. Sets up a default configuration at the system and user level, and installs xdg-desktop-portal-gtk.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    xdg.portal = lib.mkIf cfg.hyprland.enable {
+      enable = true;
+      extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
+    };
+
+    programs.hyprland.enable = cfg.hyprland.enable;
+  };
+}

modules/linux/desktop-portal/default.nix

@@ -1,7 +0,0 @@
-{ pkgs, ... }:
-{
-  xdg.portal = {
-    enable = true;
-    extraPortals = with pkgs; [ xdg-desktop-portal-gtk ];
-  };
-}