Symfony\Installer\DemoCommand::execute PHP Метод

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        try {
            $this->checkInstallerVersion()->checkProjectName()->checkPermissions()->download()->extract()->cleanUp()->updateComposerConfig()->createGitIgnore()->checkSymfonyRequirements()->displayInstallationResult();
        } catch (AbortException $e) {
            aborted:
            $output->writeln('');
            $output->writeln('<error>Aborting download and cleaning up temporary directories.</>');
            $this->cleanUp();
            return 1;
        } catch (\Exception $e) {
            // Guzzle can wrap the AbortException in a GuzzleException
            if ($e->getPrevious() instanceof AbortException) {
                goto aborted;
            }
            $this->cleanUp();
            throw $e;
        }
    }