如何正确生成 robots.txt Symfony 4？

在我看来，这里的捆绑包是多余的，可以通过几个步骤来解决

config/services.yaml

parameters:
    robots.txt:
        - 'User-agent: *'
        - 'User-agent: Google'

services:
    # default configuration for services in *this* file
    _defaults:
        autowire: true      # Automatically injects dependencies in your services.
        autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
        public: true

        bind:
            $userAgentParams: '%robots.txt%'

src/Controller/RobotsTxtController.php

<?php

namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

/**
 * @Route("robots.txt")
 */
class RobotsTxtController
{
    /**
     * @var array
     */
    private $userAgentParams;

    public function __construct(array $userAgentParams)
    {
        $this->userAgentParams = $userAgentParams;
    }

    public function __invoke(): Response
    {
        return new Response(implode(PHP_EOL, $this->userAgentParams));
    }
}