phpbb\install\console\command\install\install::execute PHP Method

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->iohandler_factory->set_environment('cli');
        /** @var \phpbb\install\helper\iohandler\cli_iohandler $iohandler */
        $iohandler = $this->iohandler_factory->get();
        $style = new SymfonyStyle($input, $output);
        $iohandler->set_style($style, $output);
        $this->installer->set_iohandler($iohandler);
        $config_file = $input->getArgument('config-file');
        if ($this->install_helper->is_phpbb_installed()) {
            $iohandler->add_error_message('INSTALL_PHPBB_INSTALLED');
            return 1;
        }
        if (!is_file($config_file)) {
            $iohandler->add_error_message(array('MISSING_FILE', $config_file));
            return 1;
        }
        try {
            $config = Yaml::parse(file_get_contents($config_file), true, false);
        } catch (ParseException $e) {
            $iohandler->add_error_message(array('INVALID_YAML_FILE', $config_file));
            return 1;
        }
        $processor = new Processor();
        $configuration = new installer_configuration();
        try {
            $config = $processor->processConfiguration($configuration, $config);
        } catch (Exception $e) {
            $iohandler->add_error_message('INVALID_CONFIGURATION', $e->getMessage());
            return 1;
        }
        $this->register_configuration($iohandler, $config);
        try {
            $this->installer->run();
            return 0;
        } catch (installer_exception $e) {
            $iohandler->add_error_message($e->getMessage());
            return 1;
        }
    }