nixos-configuration/modules/desktop/gnome.nix

{
  config,
  pkgs,
  lib,
  ...
}: let
  isEnabled = config.my.desktop.enableGnome;
  enableHomeManager = config.my.modulesCfg.enableHomeManager;
in {
  options.my.desktop.enableGnome = lib.mkEnableOption "gnome desktop";

  config = lib.mkMerge [
    (lib.mkIf isEnabled {
      my.desktop.enable = true;

      services = {
        xserver = {
          # Enable the GNOME Desktop Environment.
          displayManager.gdm.enable = true;
          desktopManager.gnome.enable = true;
        };

        gnome = {
          tracker-miners.enable = false;
          tracker.enable = false;
        };
      };

      programs.gpaste.enable = true;

      environment = {
        systemPackages = with pkgs; [
          gnomeExtensions.gsconnect
        ];

        # remove some gnome default apps
        gnome.excludePackages = with pkgs.gnome; [
          cheese # photo booth
          epiphany # web browser
          evince # document viewer
          geary # email client
          seahorse # password manager
          gnome-clocks
          gnome-maps
          gnome-weather
          gnome-music
          pkgs.gnome-connections
        ];
      };
    })
    (lib.mkIf (isEnabled && enableHomeManager) {
      home-manager.sharedModules = [
        {
          home.packages = with pkgs; [
            amberol
          ];
          dconf.settings = {
            "org/gnome/desktop/peripherals/keyboard" = {
              numlock-state = true;
            };
          };
        }
      ];
    })
  ];
}