Support [skip ci] on default branch

[rantoniuk]

Service(s)

ci.jenkins.io

Summary

It seems to me that ci.jenkins.io currently does not support skipping CI builds when the commit message contains a pre-defined string - or - the supported strings are not aligned with Github Actions. Is the https://plugins.jenkins.io/scmskip/ installed?

Reproduction steps

See last couple of commits on https://github.com/jenkinsci/jira-plugin/commits/master/ that had [skip ci] in their commit message. The GHA did not fire, but the Jenkins jobs did.

[dduportal]

Hi @rantoniuk , thanks for raising this issue. We've triaged this issue during today's Jenkins Infra team meeting and are going to start working on it.

FTR, the scmskip plugin is NOT installed on ci.jenkins.io. I don't recall a user requesting this use case: we usually utilizes PR builds labels and accept that commits on the principal branch are always built.

But your request is legit considering you're working with tiny commits directly on the principal branch of this commit:it would avoid running unneeded builds on ci.jenkins.io.