Comment by jeblair

Zuul is an open-source CI/CD/project-gating-system that implements this for Github, GitLab, Gerrit, and pagure. It actually lets you stack dependencies between any of those systems. Just say "Depends-On: <url>" in the PR.

See https://zuul-ci.org/ and https://zuul-ci.org/docs/zuul/discussion/gating.html#cross-p...