Symfony\Component\Console\Helper\ProgressBar::display PHP Method

    public function display()
    {
        if (OutputInterface::VERBOSITY_QUIET === $this->output->getVerbosity()) {
            return;
        }
        if (null === $this->format) {
            $this->setRealFormat($this->internalFormat ?: $this->determineBestFormat());
        }
        $this->overwrite($this->buildLine());
    }

 /**
  * Run the command.
  *
  * @param InputInterface $input
  * @param OutputInterface $output
  *
  * @return void
  * @throws Exception
  */
 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $serviceName = $input->getArgument('service');
     $service = $this->serviceManager->getService($serviceName);
     $hostProvider = $service->getHostProvider();
     $this->getApplication()->find('listhosts')->run(new ArrayInput(['service' => $serviceName]), $output);
     $output->writeln("");
     $progress = new ProgressBar($output, 5);
     $progress->setFormat(' %current%/%max% [%bar%] %percent:3s%% %message%');
     $progress->setMessage('Checking existing hosts');
     $progress->start();
     $currentHostCount = count($hostProvider->getHostsForService($service));
     if ($service->maxHosts && $currentHostCount >= $service->maxHosts) {
         throw new Exception("There are already {$currentHostCount}/{$service->maxHosts} hosts for {$serviceName}.");
     }
     $newInstance = $currentHostCount + 1;
     $hostname = sprintf($service->hostnameTemplate, $newInstance);
     $host = $hostProvider->launch($hostname, $service->hostDefaults);
     $hostname = $host->getHostname();
     // Just check it set the right name
     $progress->setMessage("Created host " . $hostname . " at " . $hostProvider->getName());
     $progress->advance();
     sleep(5);
     $progress->setMessage("Waiting for " . $hostname . " to be ready");
     $progress->advance();
     while (!$host->isReady()) {
         $lastState = $host->getState();
         $progress->setMessage("Waiting for " . $hostname . " to be ready (Current sate: " . $lastState . ")");
         $progress->display();
         sleep(10);
     }
     if (!empty($service->testUrl)) {
         $progress->setMessage("Testing host's HTTP response");
         $progress->advance();
         do {
             $lastResponse = $host->testHttp($service->testUrl, $service->testUrlHeaders);
             $progress->setMessage("Testing host's HTTP response (Current response: {$lastResponse})");
             $progress->display();
             $lastResponse === 200 || sleep(5);
         } while ($lastResponse !== 200);
     }
     $dnsProvider = $service->getDnsProvider();
     $recordData = [];
     foreach ($host->publicIps as $ip) {
         foreach ($service->dnsRecords as $domain => $domainRecords) {
             foreach ($domainRecords as $record => $recordSettings) {
                 $data = ['domain' => $domain, 'type' => $ip->version === 6 ? 'AAAA' : 'A', 'name' => sprintf($record, $newInstance), 'value' => $ip->ip];
                 $recordData[] = $data + $recordSettings;
             }
         }
     }
     $progress->setMessage("Adding " . count($recordData) . " DNS records to " . $dnsProvider->getName());
     $progress->advance();
     $dnsProvider->addRecords($recordData);
     $progress->setMessage('Done!');
     $progress->finish();
     $output->writeln("");
     $output->writeln("");
     $this->getApplication()->find('listhosts')->run(new ArrayInput(['service' => $serviceName]), $output);
 }