1 <?php

     2 

     3 /*

     4  * This file is part of the Symfony package.

     5  *

     6  * (c) Fabien Potencier <fabien@symfony.com>

     7  *

     8  * For the full copyright and license information, please view the LICENSE

     9  * file that was distributed with this source code.

    10  */

    11 

    12 namespace Symfony\Bundle\TwigBundle\CacheWarmer;

    13 

    14 use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface;

    15 use Symfony\Component\DependencyInjection\ContainerInterface;

    16 use Symfony\Bundle\FrameworkBundle\CacheWarmer\TemplateFinderInterface;

    17 

    18 /**

    19  * Generates the Twig cache for all templates.

    20  *

    21  * This warmer must be registered after TemplatePathsCacheWarmer,

    22  * as the Twig loader will need the cache generated by it.

    23  *

    24  * @author Fabien Potencier <fabien@symfony.com>

    25  */

    26 class TemplateCacheCacheWarmer implements CacheWarmerInterface

    27 {

    28     protected $container;

    29     protected $warmer;

    30 

    31     /**

    32      * Constructor.

    33      *

    34      * @param ContainerInterface      $container The dependency injection container

    35      * @param TemplateFinderInterface $finder    The template paths cache warmer

    36      */

    37     public function __construct(ContainerInterface $container, TemplateFinderInterface $finder)

    38     {

    39         // We don't inject the Twig environment directly as it depends on the

    40         // template locator (via the loader) which might be a cached one.

    41         // The cached template locator is available once the TemplatePathsCacheWarmer

    42         // has been warmed up

    43         $this->container = $container;

    44         $this->finder = $finder;

    45     }

    46 

    47     /**

    48      * Warms up the cache.

    49      *

    50      * @param string $cacheDir The cache directory

    51      */

    52     public function warmUp($cacheDir)

    53     {

    54         $twig = $this->container->get('twig');

    55 

    56         foreach ($this->finder->findAllTemplates() as $template) {

    57             if ('twig' !== $template->get('engine')) {

    58                 continue;

    59             }

    60 

    61             try {

    62                 $twig->loadTemplate($template);

    63             } catch (\Twig_Error $e) {

    64                 // problem during compilation, give up

    65             }

    66         }

    67     }

    68 

    69     /**

    70      * Checks whether this warmer is optional or not.

    71      *

    72      * @return Boolean always true

    73      */

    74     public function isOptional()

    75     {

    76         return true;

    77     }

    78 }