EzSystems\PlatformInstallerBundle\Command\InstallPlatformCommand::cacheClear PHP Метод

    private function cacheClear(OutputInterface $output)
    {
        if (!is_writable($this->cacheDir)) {
            throw new \RuntimeException(sprintf('Unable to write in the "%s" directory', $this->cacheDir));
        }
        $output->writeln(sprintf('Clearing cache for directory <info>%s</info>', $this->cacheDir));
        $oldCacheDir = $this->cacheDir . '_old';
        if ($this->filesystem->exists($oldCacheDir)) {
            $this->filesystem->remove($oldCacheDir);
        }
        $this->cacheClearer->clear($this->cacheDir);
        $this->filesystem->rename($this->cacheDir, $oldCacheDir);
        $this->filesystem->remove($oldCacheDir);
    }