recompile example

$compiler = $this->container->get('theme_compiler');

        foreach ($shopsWithThemes as $shop) {
            if (!$current) {
                $output->writeln(sprintf('Generating new theme cache for shop "%s" ...', $shop->getName()));
                $compiler->compile($shop);
                continue;
            }

            $timestamp = $this->container->get('theme_timestamp_persistor')->getCurrentTimestamp($shop->getId());
            $output->writeln(sprintf('Generating theme cache for shop "%s" from current timestamp %s', $shop->getName(), $timestamp));
            $compiler->recompile($shop);
        }

        if ($current) {
            return 0;
        }

        $cacheManager = $this->container->get(CacheManager::class);
        $output->writeln('Clearing HTTP cache ...');
        $cacheManager->clearHttpCache();

        return 0;
    }