Answering (part of) my own question: there's an environment variable CHANGE_AUTHOR that gets set on a PR. There's also the pipeline-github-plugin that provides information about a PR.
Now to figure out how to find out if the change author is a member/collaborator or not... -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/601db8fb-8f13-4dfa-bbaf-4595629053f7%40googlegroups.com.
