<?php

namespace WP_CLI\Bootstrap;

use WP_CLI;
use WP_CLI\Runner;

/**
 * Class RunnerInstance.
 *
 * Convenience class for steps that make use of the `WP_CLI\Runner` object.
 *
 * @package WP_CLI\Bootstrap
 */
final class RunnerInstance {

    /**
     * Return an instance of the `WP_CLI\Runner` object.
     *
     * Includes necessary class files first as needed.
     *
     * @return Runner
     */
    public function __invoke() {
        if ( ! class_exists( 'WP_CLI\Runner' ) ) {
            require_once WP_CLI_ROOT . '/php/WP_CLI/Runner.php';
        }

        if ( ! class_exists( 'WP_CLI\Configurator' ) ) {
            require_once WP_CLI_ROOT . '/php/WP_CLI/Configurator.php';
        }

        return WP_CLI::get_runner();
    }
}