{ lib, namespace, ... }:
with lib;
let
  inherit (lib.mjallen) mkOpt;
in
{

  options.${namespace}.impermanence = {
    enable = mkEnableOption "enable impermanence";
    persistencePath = mkOption {
      type = types.str;
      default = "/nix/persist/system";
      description = "Path to the persistence directory";
    };

    # extraDirectories = mkOpt (types.listOf types.path) [ ] "Extra directory paths to add to impermanence";
    extraDirectories = mkOpt (types.listOf (types.either types.str (types.submodule {
      options = {
        directory = mkOption {
          type = types.str;
          description = "Directory path";
        };
        user = mkOption {
          type = types.str;
          default = "root";
          description = "Directory owner";
        };
        group = mkOption {
          type = types.str;
          default = "root";
          description = "Directory group";
        };
        mode = mkOption {
          type = types.str;
          default = "u=rwx,g=rx,o=";
          description = "Directory permissions";
        };
      };
    }))) [ ] "Extra directory paths to add to impermanence";
    extraFiles = mkOpt (types.listOf types.path) [ ] "Extra file paths to add to impermanence";
  };
}