Add error or warning for GitHub links

[apinnick]

OpenShift does not allow links to GitHub repositories unless they are in auto-generated API references. Other projects require project management approval. The RHSSG also does not allow links to GitHub. I think it would be a good idea to add a rule to detect GitHub links.

[aireilly]

Great idea! Do you want to put this in? Something like this would work:

---
extends: substitution
ignorecase: false
level: error
link: https://redhat-documentation.github.io/vale-at-red-hat/docs/main/reference-guide/github/
message: "%s"
scope: raw
swap:
  # Start each error message with "Do not use ..."
  # Error messages must be single quoted.
  'https://github.com/': 'Do not include links to GitHub in source.'

[apinnick]

Feel free to assign me to this issue if that helps.

[aireilly]

Note - repos inside the OpenShift org are Ok. https://github.com/openshift/* are fine.

[apinnick]

Note - repos inside the OpenShift org are Ok. https://github.com/openshift/* are fine.

I think "owned and maintained by Red Hat" would cover that. Or did you want that URL in the 'valid' list?

[aireilly]

I think we need clarification from @kalexand-rh maybe. Are all GitHub links forbidden? Or are GitHub links from inside the OpenShift organization allowed?