public static function getBundledCaBundlePath()
    {
        $caBundleFile = __DIR__.'/../res/cacert.pem';

        // cURL does not understand 'phar://' paths
        // see https://github.com/composer/ca-bundle/issues/10
        if (0 === strpos($caBundleFile, 'phar://')) {
            file_put_contents(
                $tempCaBundleFile = tempnam(sys_get_temp_dir(), 'openssl-ca-bundle-'),
                file_get_contents($caBundleFile)
            );

            register_shutdown_function(function() use ($tempCaBundleFile) {
                @unlink($tempCaBundleFile);
            });

            $caBundleFile = $tempCaBundleFile;
        }

        return $caBundleFile;
    }