composer/bin/composer

#!/usr/bin/env php
<?php

require __DIR__.'/../tests/bootstrap.php';

use Composer\Composer;
use Composer\Downloader\GitDownloader;
use Composer\Command\InstallCommand;
use Composer\Installer\LibraryInstaller;

$composer = new Composer();
$composer->addDownloader('git', new GitDownloader);
$composer->addInstaller('library', new LibraryInstaller);

$cmd = new InstallCommand();
$cmd->install($composer);