public function copyDir($source, $target, $dir)
    {
        $this->mkDir($target);
        $serverOs = (new \Zest\Common\OperatingSystem())->get();
        $command = ($serverOs === 'Windows') ? 'xcopy ' : 'cp -r ';
        if (is_dir($source.$dir)) {
            shell_exec($command.$source.$dir.' '.$target);
        }
    }