nix-configs/modules/de/dm.nix

{
  pkgs,
  config,
  lib,
  ...
}: let
  cfg = config.jade.desktop.dm;
in
  with lib; {
    options.jade.desktop.dm.autoLogin = {
      enable = mkEnableOption "Enable Autologin";
      delay = mkOption {
        type = types.int;
        default = 0;
      };
    };
    config.services = {
      displayManager = {
        autoLogin = {
          enable = cfg.autoLogin.enable;
          user = "jade";
        };
        defaultSession = "niri";
      };
      xserver.displayManager.gdm = {
        enable = true;
        banner = "Meow :3";
        autoLogin = {
          delay = cfg.autoLogin.delay;
        };
      };
    };
  }