No RuboCop doc links for extensions

[Earlopain]

Description

Here is how it looks like for buildin cops:

RuboCop Rails (and all other extensions):

This may be an upstream issue rubocop/rubocop#12884

However I think it makes sense to report this here as well since I don't think there are many consumers of this API in the first place.

Context

documentation_url will only return a result for base RuboCop cops. Per the methods documentation, extensions are encouraged to implement this themselves but none I know of do, including all the official ones.

https://github.com/rubocop/rubocop/blob/7f9595aa3ca3524f888b1464c4eeb7e15aabfc22/lib/rubocop/cop/base.rb#L63-L69

rubocop --show-docs-url Rails/Exit prints the correct result, however it relies on private API.

[andyw8]

👋 Thanks for the report, and for creating the issue upstream. I don't think there's really anything we can do within ruby-lsp for this currently. Once rubocop/rubocop#12884 is resolved, this should start to work. If not, feel free to re-open.