nixos/freenet: refactor

# NixOS module for Freenet daemon

{

  config,

  lib,

  pkgs,

  ...

}:

let

let

  cfg = config.services.freenet;

  varDir = "/var/lib/freenet";

in

{

  ### configuration

  options = {

    services.freenet = {

      enable = lib.mkOption {

        type = lib.types.bool;

        default = false;

        description = "Enable the Freenet daemon";

      };

      enable = lib.mkEnableOption "Freenet daemon";

      nice = lib.mkOption {

        type = lib.types.int;

        default = 10;

        description = "Set the nice level for the Freenet daemon";

      };

    };

  };

  ### implementation

  config = lib.mkIf cfg.enable {

    systemd.services.freenet = {

      description = "Freenet daemon";

      after = [ "network.target" ];

      wantedBy = [ "multi-user.target" ];

      serviceConfig.ExecStart = "${pkgs.freenet}/bin/freenet";

      serviceConfig.User = "freenet";

      serviceConfig.UMask = "0007";

      serviceConfig.WorkingDirectory = varDir;

      serviceConfig.Nice = cfg.nice;

      serviceConfig = {

        ExecStart = lib.getExe pkgs.freenet;

        User = "freenet";

        UMask = "0007";

        WorkingDirectory = varDir;

        Nice = cfg.nice;

      };

    };

    users.users.freenet = {

    users.groups.freenet.gid = config.ids.gids.freenet;

  };

  meta.maintainers = with lib.maintainers; [ nagy ];

}