Modularize nixos and home-manager packages

modules/programs/gnome_services.nix

@@ -0,0 +1,28 @@
+{ lib, config, options, pkgs, ... }: {
+
+  options.mods = {
+    gnome_services.enable = lib.mkOption {
+      default = true;
+      type = lib.types.bool;
+      example = false;
+      description = ''
+        Enables gnome services: keyring and settings daemon.
+        Note: Do not use these for environments which ship these functionalities by default: GNOME, KDE
+      '';
+    };
+  };
+
+  config = lib.mkIf config.mods.gnome_services.enable (lib.optionalAttrs (options?services.gnome.gnome-keyring) {
+    programs.dconf.enable = true;
+    services = {
+      # needed for GNOME services outside of GNOME Desktop
+      dbus.packages = with pkgs; [
+        gcr
+        gnome.gnome-settings-daemon
+      ];
+
+      gnome.gnome-keyring.enable = true;
+      gvfs.enable = true;
+    };
+  });
+}