init function

AssetManager.php

	public function init()
	{
		parent::init();
		$this->basePath = Yii::getAlias($this->basePath);
		if (!is_dir($this->basePath)) {
			throw new InvalidConfigException("The directory does not exist: {$this->basePath}");
		} elseif (!is_writable($this->basePath)) {
			throw new InvalidConfigException("The directory is not writable by the Web process: {$this->basePath}");
		} else {
			$this->basePath = realpath($this->basePath);
		}
		$this->baseUrl = rtrim(Yii::getAlias($this->baseUrl), '/');
	}