[FrameworkBundle] Move Router cache directory to kernel.build_dir

[fabpot]

Q	A
Feature PR	symfony/symfony#52962
PR author(s)	@Okhoshi
Merged in	7.1

We created this issue to not forget to document this new feature. We would really appreciate if you can help us with this task. If you are not sure how to do it, please ask us and we will help you.

To fix this issue, please create a PR against the 7.1 branch in the symfony-docs repository.

Thank you! 😃

[alexandre-daubois]

Had a look but it seems there's nothing to update here

[Okhoshi]

Thanks @alexandre-daubois for jumping on this so quickly 🙏

The only part I could see that would need an update is https://symfony.com/doc/current/reference/configuration/framework.html#cache-dir because the config is deprecated. I can take care of that update anyway :).

I now realize that one could set the cache_dir to null to disable the caching completely. I should reinstate that possibility.

[alexandre-daubois]

Ah yes, I missed this occurrence. PR always welcome if you're motivated to create it 🙂

[Okhoshi]

I'll create the PR once symfony/symfony#53059 is merged :)

[alexandre-daubois]

I think you can create the PR even without your last PR merged. Ping me if you need help/review 👍