Override TranslationsCacheWarmer service - symfony

Question

I have an application that contains a lot of translation resources for a lot of different languages. The warmup process takes a long time because of this.
I only support the translation of my site in a few languages, so I'd like to avoid generating catalogues for all the languages that I don't support.
What I did:
I overrode the TranslationsCacheWarmer to use my own translator. This is a custom translator that decorates the default translator but overrides the warmup method to only warmup files that are part of the locales that I support.
The problem is that the default warmer still runs generating files for all the locales.
This is the code that contains the custom translator: https://gist.github.com/marcosdsanchez/e8e2cd19031a2fbcd894
and here's how I'm defining the services:
<service id="web.translation.public_languages_translator" class="X\Translation\PublicLanguagesTranslator" public="false">
<argument type="service" id="translator.default" />
<argument type="collection">%chess.translation.public_languages%</argument>
</service>
<service id="translation.warmer" class="Symfony\Bundle\FrameworkBundle\CacheWarmer\TranslationsCacheWarmer" public="false">
<argument type="service" id="web.translation.public_languages_translator" />
<tag name="kernel.cache_warmer" />
</service>
I'm using symfony 2.7.3

Answer 1

I ended up doing something different to get the same result. Instead of trying to create a custom CacheWarmer, I created a compiler pass and modified the definition of the 'options' argument. In this compiler pass, I removed all the files that don't have the locale or language code.
Code:
<?php
namespace X\DependencyInjection\Compiler;
use X\Entity\I18nLanguage;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
class TranslatorCompilerPass implements CompilerPassInterface
{
/**
* You can modify the container here before it is dumped to PHP code.
*
* #param ContainerBuilder $container
*
* #api
*/
public function process(ContainerBuilder $container)
{
$definition = $container->getDefinition('translator.default');
$options = $definition->getArgument(3);
$keys = array_keys($options['resource_files']);
$locales = I18nLanguage::PUBLIC_LOCALES;
$langCodes = array();
foreach (I18nLanguage::PUBLIC_LOCALES as $locale) {
$langCodes[] = substr($locale, 0, strpos($locale, '_'));
}
$localesAndLangCodes = array_merge($locales, $langCodes);
foreach ($keys as $key) {
if (!in_array($key, $localesAndLangCodes, true)) {
unset($options['resource_files'][$key]);
}
}
$arguments = $definition->getArguments();
$definition->setArguments(array($arguments[0], $arguments[1], $arguments[2], $options));
}
}
That did the trick for me and I can also apply other optimizations like the removal of loaders, etc.