/
TemplateCacheWarmer.php
90 lines (78 loc) · 2.64 KB
/
TemplateCacheWarmer.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bundle\TwigBundle\CacheWarmer;
use Psr\Container\ContainerInterface;
use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface;
use Symfony\Contracts\Service\ServiceSubscriberInterface;
use Twig\Environment;
use Twig\Error\Error;
/**
* Generates the Twig cache for all templates.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class TemplateCacheWarmer implements CacheWarmerInterface, ServiceSubscriberInterface
{
private $container;
private $twig;
private $iterator;
public function __construct(ContainerInterface $container, iterable $iterator)
{
// As this cache warmer is optional, dependencies should be lazy-loaded, that's why a container should be injected.
$this->container = $container;
$this->iterator = $iterator;
}
/**
* {@inheritdoc}
*
* @return string[] A list of template files to preload on PHP 7.4+
*/
public function warmUp(string $cacheDir)
{
if (null === $this->twig) {
$this->twig = $this->container->get('twig');
}
$files = [];
foreach ($this->iterator as $template) {
try {
$template = $this->twig->load($template);
if (\is_callable([$template, 'unwrap'])) {
$files[] = (new \ReflectionClass($template->unwrap()))->getFileName();
}
} catch (Error $e) {
/*
* Problem during compilation, give up for this template (e.g. syntax errors).
* Failing silently here allows to ignore templates that rely on functions that aren't available in
* the current environment. For example, the WebProfilerBundle shouldn't be available in the prod
* environment, but some templates that are never used in prod might rely on functions the bundle provides.
* As we can't detect which templates are "really" important, we try to load all of them and ignore
* errors. Error checks may be performed by calling the lint:twig command.
*/
}
}
return $files;
}
/**
* {@inheritdoc}
*/
public function isOptional()
{
return true;
}
/**
* {@inheritdoc}
*/
public static function getSubscribedServices()
{
return [
'twig' => Environment::class,
];
}
}