Add hook_requirements() for PECL YAML parser

As related showing it still good to have #3205480-18: Drop PECL YAML library support in favor of only Symfony's YAML? →

Created MR with the latest patch

Fixed #33

I don't know if we have to recommend the PECL yaml parser. I think we could indicate what's be used for YAML parsing on the status report and link to a page on drupal.org that discusses the possibilities..

#47++

Recommending it is too strong, because one needs control over their hosting environment to be able to do this.

Informing is great 👍

The MR already provides informing

Your server is not using the PECL YAML extension for parsing YAML. Installing this extension will improve the performance of parsing YAML files on your server.

maybe it needs section at https://www.drupal.org/docs/getting-started/system-requirements/php-requ... → with the link from report/status

"will improve" sounds like a recommendation to me? 😅

Left a suggestion for changing it to "merely informing", i.e. purely observing.

Agree that

Installing this extension will improve the performance of parsing YAML files on your server.

sounds like a recommendation, or. that not doing it means I'm doing something wrong.

But maybe that sentence could be added to a section in https://www.drupal.org/docs/getting-started/system-requirements/php-requ... → that @andypost recommended.

So maybe

Your server is not using the PECL YAML extension for parsing YAML. See @link for more information.

It becoming a follow-up for 📌 PECL YAML library supports YAML 1.1, but Symfony supports YAML 1.2 Active

proper status

andypost → closed merge request !5641