Autoloader::namespaces(array(
	'Symfony\Component\Console' 
                    => path('sys').'vendor/Symfony/Component/Console',
	'Symfony\Component\HttpFoundation'
                    => path('sys').'vendor/Symfony/Component/HttpFoundation',
));

$myapp = Autoloader::namespaces(array(
	'Symfony\Component\Console' => path('sys').'vendor/Symfony/Component/Console',
	'Symfony\Component\Shell'	 => path('sys').'vendor/Symfony/Component/Shell',
));

		use Symfony\Component\Console\Shell;
		$app = new Shell($myapp, '1.0 (stable)');
		$app->add("ls -la");
		$app->run(); 

Argument 1 passed to Symfony\Component\Console\Shell::__construct() must be an instance of Symfony\Component\Console\Application, null given,

//		require_once "vendor/Symfony/Component/Console/Application.php";
//		require_once "vendor/Symfony/Component/Console/Shell.php";
		use Symfony\Component\Console\Shell;
		$app = new Shell('myapp', '1.0 (stable)');
		$app->add("ls -la");
		$app->run(); 

Argument 1 passed to Symfony\Component\Console\Shell::__construct() must be an instance of Symfony\Component\Console\Application, string given

//		require_once "vendor/Symfony/Component/Console/Application.php";
//		require_once "vendor/Symfony/Component/Console/Shell.php";
		use Symfony\Component\Console\Shell;
		$app = new \Shell('myapp', '1.0 (stable)');
		$app->add("ls -la");
		$app->run(); 

Error rendering view: [administration.index]
Class 'Shell' not found

require_once "vendor/Symfony/Component/Console/Application.php";
require_once "vendor/Symfony/Component/Console/Shell.php";
$app = new Application('myapp', '1.0 (stable)');
$app->add(new SimpleCommand());
$app->run();

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console;

use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Console\Input\ArrayInput;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Output\Output;
use Symfony\Component\Console\Output\ConsoleOutput;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Command\HelpCommand;
use Symfony\Component\Console\Command\ListCommand;
use Symfony\Component\Console\Helper\HelperSet;
use Symfony\Component\Console\Helper\FormatterHelper;
use Symfony\Component\Console\Helper\DialogHelper;

/**
 * An Application is the container for a collection of commands.
 *
 * It is the main entry point of a Console application.
 *
 * This class is optimized for a standard CLI environment.
 *
 * Usage:
 *
 *     $app = new Application('myapp', '1.0 (stable)');
 *     $app->add(new SimpleCommand());
 *     $app->run();
 *
 * @author Fabien Potencier <[email protected]>
 *
 * @api
 */
class Application
{

require_once "vendor/Symfony/Component/Console/Application.php";
require_once "vendor/Symfony/Component/Console/Shell.php";
$process = new Shell();

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console;

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Input\StringInput;
use Symfony\Component\Console\Output\ConsoleOutput;
use Symfony\Component\Process\ProcessBuilder;
use Symfony\Component\Process\PhpExecutableFinder;

/**
 * A Shell wraps an Application to add shell capabilities to it.
 *
 * Support for history and completion only works with a PHP compiled
 * with readline support (either --with-readline or --with-libedit)
 *
 * @author Fabien Potencier <[email protected]>
 * @author Martin Hasoň <[email protected]>
 */
class Shell
{

<?php
namespace Acme\FooBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\Command,
    Symfony\Component\Console\Input\InputOption,
    Symfony\Component\Console\Input\InputInterface,
    Symfony\Component\Console\Output\OutputInterface;

class BarCommand extends Command
{

    protected function configure()
    {
        $this
            ->setName('foo:bar-cmd')
            ->setDescription('Test command')
            ->addOption('baz', null, InputOption::VALUE_NONE, 'Test option');
        ;
    }

    /**
     * Execute the command
     * The environment option is automatically handled.
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $output->writeln('Test command');
    }
}

You can then run the command with:

$> app/console foo:bar-cmd

And pass in options like:

$> app/console foo:bar-cmd  --baz