Efficiently\Larasset\Commands\AssetsCommand::copyOptions PHP Method

    protected function copyOptions()
    {
        $sys = strtoupper(PHP_OS);
        if (substr($sys, 0, 3) == "WIN") {
            // Copy all files recursively, verifies each new file and overwrites existing files without prompting you.
            $copyOptions = "/E /V /Y";
        } elseif ($sys == "LINUX") {
            // Preserve date creation attribute, copy all files recursively and treat destination as a normal file
            $copyOptions = "-pRT";
        } else {
            $copyOptions = "-pR";
            // MacOS
        }
        return $copyOptions;
    }