Platformsh\Cli\Command\Environment\EnvironmentLogCommand::execute PHP Метод

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->validateInput($input);
        if ($input->getOption('tail') && $this->runningViaMulti) {
            throw new \InvalidArgumentException('The --tail option cannot be used with "multi"');
        }
        $selectedEnvironment = $this->getSelectedEnvironment();
        $appName = $this->selectApp($input);
        $sshUrl = $selectedEnvironment->getSshUrl($appName);
        // Select the log file that the user specified.
        if ($logType = $input->getArgument('type')) {
            // @todo this might need to be cleverer
            if (substr($logType, -4) === '.log') {
                $logType = substr($logType, 0, strlen($logType) - 4);
            }
            $logFilename = '/var/log/' . $logType . '.log';
        } elseif (!$input->isInteractive()) {
            $this->stdErr->writeln('No log type specified.');
            return 1;
        } else {
            /** @var \Platformsh\Cli\Helper\QuestionHelper $questionHelper */
            $questionHelper = $this->getHelper('question');
            /** @var \Platformsh\Cli\Helper\ShellHelper $shellHelper */
            $shellHelper = $this->getHelper('shell');
            // Read the list of files from the environment.
            $cacheKey = sprintf('log-files:%s', $sshUrl);
            $cache = $this->api()->getCache();
            if (!($result = $cache->fetch($cacheKey))) {
                $result = $shellHelper->execute(['ssh', $sshUrl, 'ls -1 /var/log/*.log']);
                // Cache the list for 1 hour.
                $cache->save($cacheKey, $result, 86400);
            }
            // Provide a fallback list of files, in case the SSH command failed.
            $defaultFiles = ['/var/log/access.log', '/var/log/error.log'];
            $files = $result ? explode("\n", $result) : $defaultFiles;
            // Ask the user to choose a file.
            $files = array_combine($files, array_map(function ($file) {
                return str_replace('.log', '', basename(trim($file)));
            }, $files));
            $logFilename = $questionHelper->choose($files, 'Enter a number to choose a log: ');
        }
        $command = sprintf('tail -n %1$d %2$s', $input->getOption('lines'), escapeshellarg($logFilename));
        if ($input->getOption('tail')) {
            $command .= ' -f';
        }
        $this->stdErr->writeln(sprintf('Reading log file <info>%s:%s</info>', $sshUrl, $logFilename));
        $sshCommand = sprintf('ssh -C %s %s', escapeshellarg($sshUrl), escapeshellarg($command));
        return $this->getHelper('shell')->executeSimple($sshCommand);
    }