nixos: add gnome module

nixosModules/desktop/default.nix

@@ -6,6 +6,7 @@
 }: {
   imports = [
     ./greetd
+    ./gnome
     ./hyprland
     ./sway
     ./waylandComp.nix
@@ -13,7 +14,8 @@
 
   config =
     lib.mkIf (
-      config.ar.desktop.hyprland.enable
+      config.ar.desktop.gnome.enable
+      || config.ar.desktop.hyprland.enable
       || config.ar.desktop.steam.enable
       || config.ar.desktop.sway.enable
     ) {

nixosModules/desktop/gnome/default.nix

@@ -0,0 +1,66 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: {
+  config = lib.mkIf config.ar.desktop.gnome.enable {
+    # nixpkgs.overlays = [
+    #   # GNOME 46: triple-buffering-v4-46
+    #   (final: prev: {
+    #     gnome = prev.gnome.overrideScope (gnomeFinal: gnomePrev: {
+    #       mutter = gnomePrev.mutter.overrideAttrs (old: {
+    #         src = pkgs.fetchFromGitLab {
+    #           domain = "gitlab.gnome.org";
+    #           owner = "vanvugt";
+    #           repo = "mutter";
+    #           rev = "triple-buffering-v4-46";
+    #           hash = "sha256-nz1Enw1NjxLEF3JUG0qknJgf4328W/VvdMjJmoOEMYs=";
+    #         };
+    #       });
+    #     });
+    #   })
+    # ];
+
+    security.pam.services = {
+      login.fprintAuth = false;
+
+      gdm = {
+        enableGnomeKeyring = true;
+        gnupg.enable = true;
+        kwallet.enable = true;
+      };
+
+      gdm-fingerprint = lib.mkIf (config.services.fprintd.enable) {
+        text = ''
+          auth       required                    pam_shells.so
+          auth       requisite                   pam_nologin.so
+          auth       requisite                   pam_faillock.so      preauth
+          auth       required                    ${pkgs.fprintd}/lib/security/pam_fprintd.so
+          auth       optional                    pam_permit.so
+          auth       required                    pam_env.so
+          auth       [success=ok default=1]      ${pkgs.gnome.gdm}/lib/security/pam_gdm.so
+          auth       optional                    ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so
+
+          account    include                     login
+
+          password   required                    pam_deny.so
+
+          session    include                     login
+          session    optional                    ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start
+        '';
+      };
+    };
+
+    # Enable GNOME and GDM.
+    services = {
+      gnome.tracker-miners.enable = true;
+      udev.packages = with pkgs; [gnome.gnome-settings-daemon];
+
+      xserver = {
+        desktopManager.gnome.enable = true;
+        displayManager.gdm.enable = true;
+      };
+    };
+  };
+}

nixosModules/options.nix

@@ -29,6 +29,7 @@
         };
       };
 
+      gnome.enable = lib.mkEnableOption "GNOME desktop session.";
       hyprland.enable = lib.mkEnableOption "Hyprland wayland session.";
       steam.enable = lib.mkEnableOption "Steam + Gamescope session.";
       sway.enable = lib.mkEnableOption "Sway wayland session.";