Example of command that depends on the "framework.templating.assets_version" configuration value.

AcmeAssetsVersionDependentCommand.php

<?php

namespace Acme\DemoBundle\Command;

use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\HttpFoundation\Request;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;

/**
 * assets_version dependent command
 */
class AcmeAssetsVersionDependentCommand extends ContainerAwareCommand
{
    /**
     * {@inheritDoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->getContainer()->enterScope('request');
        $this->getContainer()->set('request', new Request());
        $version = $this->getContainer()->get('templating.helper.assets')->getVersion();
        $this->getContainer()->leaveScope('request');

        // use $version
    }
}