sf2cli.php

<?php

// change this with the actual path you cloned sf2 to
$sf2_path = '~/symfony/src';

use Symfony\Foundation\ClassLoader;
use Symfony\Components\Console\Application;

require_once $sf2_path.'/Symfony/Foundation/ClassLoader.php';

$loader = new ClassLoader();
$loader->registerNamespace('Symfony', $sf2_path);
$loader->register();

$app = new Application();
$app->run();