interserver / myadmin-plugin-installer

	 * @param Event $event

	 * @return array an array of directory paths

	 */

	public static function getWritableDirs(Event $event) {

		$configuration = $event->getComposer()->getPackage()->getExtra();

		if (!isset($configuration['writable-dirs']))

			throw new \Exception('The writable-dirs must be specified in composer arbitrary extra data.');

		if (!is_array($configuration['writable-dirs']))

			throw new \Exception('The writable-dirs must be an array.');

		return $configuration['writable-dirs'];

	}

	/**

	 * returns a list of writeable files specified in the writeable-files composer extra options

	 * @param Event $event

	 * @return array an array of file paths

	 */

	public static function getWritableFiles(Event $event) {

		$configuration = $event->getComposer()->getPackage()->getExtra();

		if (!isset($configuration['writable-files']))

			throw new \Exception('The writable-files must be specified in composer arbitrary extra data.');

		if (!is_array($configuration['writable-files']))

			throw new \Exception('The writable-files must be an array.');

		return $configuration['writable-files'];

	}

	/**

	 * Sets Writrable Directory permissions for any directories listed in the writeable-dirs option using setfacl