nichts/modules/options/system/options.mod.nix

{
  config,
  lib,
  ...
}:
let
  inherit (builtins) elemAt;
  inherit (lib.options) mkOption mkEnableOption;
  inherit (lib.types)
    enum
    listOf
    str
    nullOr
    bool
    ;
  inherit (lib.lists) elem;

  inherit (config.modules.system) systemType;
in
{
  options.modules.system = {
    users = mkOption {
      type = listOf str;
      default = [ "cr" ];
      description = "A list of  users on the system.";
    };

    autoLogin = mkOption {
      type = bool;
      default = false;
      description = ''
        Whether to enable passwordless login. This is generally useful on systems with
        FDE (Full Disk Encryption) enabled. It is a security risk for systems without FDE.
      '';
    };

    systemType = mkOption {
      type = nullOr (enum [
        "desktop"
        "laptop"
        "server"
      ]);
      default = null;
      description = ''
        The type of the current system. This is used to determine whether things like graphical
        environments and power-saving programs should be installed or not.
      '';
    };

    isGraphical = mkOption {
      type = bool;
      default = elem systemType [
        "desktop"
        "laptop"
      ];
      description = ''
        Whether the current system is a graphical system.
      '';
    };

    yubikeySupport = {
      enable = mkEnableOption "yubikey support";
      deviceType = mkOption {
        type = nullOr (enum [
          "NFC5"
          "nano"
        ]);
        default = null;
        description = "A list of device models to enable Yubikey support for";
      };
    };

    sound = {
      enable = mkEnableOption "sound related programs and audio-dependent programs";
    };
    impermanence = {
      enable = mkEnableOption "Enable Impermanence";
    };

    video = {
      enable = mkEnableOption "video drivers and programs that require a graphical user interface";
      nvidia = mkEnableOption "Nvidia graphics drivers";
      amd = mkEnableOption "AMD graphics drivers";
    };

    hardware.bluetooth = {
      enable = mkEnableOption "bluetooth modules, drivers and configuration program(s)";
      powerOnBoot = mkEnableOption "Enable bluetooth on boot";
    };

    # should the device enable printing module and try to load common printer modules
    # you might need to add more drivers to the printing module for your printer to work
    printing = {
      enable = mkEnableOption "printing";
      extraDrivers = mkOption {
        type = listOf str;
        default = [ ];
        description = "A list of extra drivers to enable for printing";
      };
    };
  };
}