protected function makeCommand($connection, $connectionName)
    {
        $cmd[] = 'mysqldump -u ' . $connection['username'];
        $cmd[] = '--password=' . $connection['password'];
        $cmd[] = $connection['database'];
        $cmd[] = ' -h ' . $connection['host'];
        if ( ! empty($connection['port'])) {
            $cmd[] = '-P ' . $connection['port'];
        }
        $cmd[] = '> ' . $this->filename($connectionName);
        return implode(' ', $cmd);
    }