Add gdm gnome sddm kde

modules/programs/gnome.nix

@@ -0,0 +1,74 @@
+{
+  lib,
+  options,
+  config,
+  pkgs,
+  ...
+}:
+{
+  options.mods.gnome = {
+    enable = lib.mkOption {
+      default = false;
+      example = true;
+      type = lib.types.bool;
+      description = "Enables the Gnome desktop environment";
+    };
+    useDefaultOptions = lib.mkOption {
+      default = true;
+      example = false;
+      type = lib.types.bool;
+      description = "Use default options provided by module. If disabled, will only apply extraOptions.";
+    };
+    extraOptions = lib.mkOption {
+      default = { };
+      example = { };
+      type = with lib.types; attrsOf anything;
+      description = "Extra options to be applied to the gnome config";
+    };
+    extraDconf = lib.mkOption {
+      default = { };
+      example = { };
+      type = with lib.types; attrsOf anything;
+      description = "Extra options to be applied to the dconf config";
+    };
+  };
+
+  config =
+    let
+      defaultExtensions = with pkgs.gnomeExtensions; [
+        blur-my-shell
+        dash-to-dock
+        tray-icons-reloaded
+      ];
+    in
+    lib.mkIf config.mods.gnome.enable (
+      lib.optionalAttrs (options ? services.xserver.desktopManager.gnome) (
+        {
+          services.xserver = {
+            enable = true;
+            desktopManager.gnome.enable = true;
+          };
+        }
+        // lib.mkIf config.mods.gnome.useDefaultOptions { environment.systemPackages = defaultExtensions; }
+        // {
+          services.xserver.desktopManager.gnome = config.mods.gnome.extraOptions;
+        }
+      )
+      // lib.optionalAttrs (options ? dconf) (
+        lib.mkIf config.mods.gnome.useDefaultOptions {
+          dconf = {
+            enable = true;
+            settings = {
+              "org/gnome/shell" = {
+                disable-user-extensions = false;
+                enabled-extensions = map (extension: extension.extensionUuid) defaultExtensions;
+              };
+            };
+          };
+        }
+        // {
+          dconf = config.mods.gnome.extraDconf;
+        }
+      )
+    );
+}