<?php

/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
namespace yii\composer;

use Composer\Composer;
use Composer\IO\IOInterface;
use Composer\Plugin\PluginInterface;

/**
 * Plugin is the composer plugin that registers the Yii composer installer.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Plugin implements PluginInterface {
	/**
	 * @inheritdoc
	 */
	public function activate(Composer $composer, IOInterface $io) {
		$installer = new Installer ( $io, $composer );
		$composer->getInstallationManager ()->addInstaller ( $installer );
		$file = rtrim ( $composer->getConfig ()->get ( 'vendor-dir' ), '/' ) . '/yiisoft/extensions.php';
		if (! is_file ( $file )) {
			@mkdir ( dirname ( $file ), 0777, true );
			file_put_contents ( $file, "<?php\n\nreturn [];\n" );
		}
	}
}