templates/system/modules/ui/desktops/budgie.nix

# Enables the Budgie desktop environment.
{
  pkgs,
  config,
  lib,
  ...
}:
let
  cfg = config.aux.system.ui.desktops.budgie;
in
{
  options = {
    aux.system.ui.desktops.budgie.enable = lib.mkEnableOption (
      lib.mdDoc "Enables the Budgie desktop environment."
    );
  };

  config = lib.mkIf cfg.enable {
    aux.system.ui.desktops = {
      enable = true;
      displayManager = lib.mkOptionDefault "lightdm";
    };

    services.xserver = {
      enable = true;
      desktopManager.budgie.enable =
        if config.services.xserver.desktopManager.gnome.enable then
          builtins.abort "Budgie and Gnome cannot be enabled at the same time due to a bug. For details and a possible workaround, please see https://discourse.nixos.org/t/help-i-cant-have-pantheon-gnome-and-plasma-installed-on-my-system-at-the-same-time/47346"
        else
          true;
    };
  };
}