public static function getEnv($name)
    {
        $envs = [];
        $output = self::runCommand('env', [$name]);
        if (trim($output->getOutput()) == "$name is not running. Please start this with docker-machine start $name") {
            throw new \Exception('Docker machine has not been started yet.');
        }
        $envOutput = explode(PHP_EOL, $output->getOutput());
        foreach ($envOutput as $line) {
            if (strpos($line, 'export') !== false) {
                list(, $export) = explode(' ', $line, 2);
                list($key, $value) = explode('=', $export, 2);
                $envs[$key] = str_replace('"', '', $value);
            }
        }
        return $envs;
    }