# Copyright (c) 2019-2024, see AUTHORS. Licensed under MIT License, see LICENSE.

{ config, lib, pkgs, ... }:

with lib;

{

  ###### interface

  options = {

    system.stateVersion = mkOption {
      type = types.enum [
        "19.09"
        "20.03"
        "20.09"
        "21.05"
        "21.11"
        "22.05"
        "22.11"
        "23.05"
        "23.11"
        "24.05"
      ];
      description = ''
        It is occasionally necessary for Nix-on-Droid to change
        configuration defaults in a way that is incompatible with
        stateful data. This could, for example, include switching the
        default data format or location of a file.

        </para><para>

        The <emphasis>state version</emphasis> indicates which default
        settings are in effect and will therefore help avoid breaking
        program configurations. Switching to a higher state version
        typically requires performing some manual steps, such as data
        conversion or moving files.
      '';
    };

  };

}