add gnome module

modules/gnome.nix

@@ -0,0 +1,92 @@
+{ config, nixosConfig, lib, mylib, pkgs, ... }:
+
+with lib;
+with mylib.modules;
+
+let
+  cfg = config.modules.gnome;
+in {
+
+  options.modules.gnome = {
+    enable = mkEnableOpt "Gnome Desktop";
+    extensions = mkBoolOpt false "Enable Gnome shell-extensions";
+
+    # TODO: Add other themes, whitesur for example
+    theme = {
+      papirusIcons = mkBoolOpt false "Enable the Papirus icon theme";
+      numixCursor = mkBoolOpt false "Enable the Numix cursor theme";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = nixosConfig.services.xserver.desktopManager.gnome.enable;
+        message = "Can't enable Gnome module when Gnome is not enabled!";
+      }
+    ];
+
+    gtk = mkMerge [
+      { enable = true; }
+
+      (optionalAttrs cfg.papirusIcons {
+        iconTheme.package = pkgs.papirus-icon-theme;
+        iconTheme.name = "Papirus";
+      })
+    ];
+
+    home.pointerCursor = mkMerge [
+      {
+        pointerCursor.gtk.enable = true;
+        pointerCursor.x11.enable = true;
+      }
+
+      (optionalAttrs cfg.numixCursor {
+        pointerCursor.package = pkgs.numix-cursor-theme;
+        pointerCursor.name = "Numix-Cursor";
+      })
+    ];
+
+    home.packages = with pkgs; builtins.concatLists [
+      [
+        # gnome.gnome-session # Allow to start gnome from tty (sadly this is not usable, many things don't work)
+        gnome.gnome-boxes # VM
+        gnome.sushi # Gnome files previews
+        gnome.gnome-logs # systemd log viewer
+        gnome.gnome-tweaks # conflicts with nixos/hm gnome settings file sometimes, watch out what settings to change
+        gnome.gnome-nettool
+        gnome.simple-scan
+        gnome.gnome-sound-recorder
+        gnome.file-roller # archive manager
+        # gnome-usage # Alternative system performance monitor (gnome.gnome-system-monitor is the preinstalled one)
+        # gnome-secrets # Alternative keepass database viewer
+        gnome-firmware
+      ]
+
+      (optionals cfg.extensions [
+        gnomeExtensions.appindicator
+        gnomeExtensions.blur-my-shell
+        gnomeExtensions.sound-output-device-chooser
+        gnomeExtensions.vitals
+        gnomeExtensions.no-overview
+        # gnomeExtensions.switch-workspace
+        gnomeExtensions.maximize-to-empty-workspace
+        gnomeExtensions.pip-on-top
+        gnomeExtensions.custom-hot-corners-extended
+        # gnomeExtensions.dock-from-dash
+        gnomeExtensions.gamemode
+        # gnomeExtensions.gsconnect # kde connect alternative
+        # gnomeExtensions.quake-mode # dropdown for any application
+        # gnomeExtensions.systemd-manager # to quickly start nextcloud
+        gnomeExtensions.extensions-sync
+        gnomeExtensions.tweaks-in-system-menu
+        # gnomeExtensions.compiz-windows-effect # WobBlY wiNdoWS
+        gnomeExtensions.panel-scroll
+        gnomeExtensions.rounded-window-corners
+        # gnomeExtensions.easyeffects-preset-selector # Throws error com.sth could not be found, dbus problem?
+        gnomeExtensions.launch-new-instance
+        gnomeExtensions.auto-activities
+      ])
+    ];
+  };
+}