When writing a Jenkinsfile, if you have email notifications, or notifications in general, this probably does not make sense to send those when building a PR. Same goes for actual deployments or touching real environments by any mean.

PR are reviewed through GitHub, have a build status there, and so on. So by default, sending emails to maintainers creates unnecessary noise.

Maybe this be globally enabled/disabled by default though the new options block.

Like:

options {
   notifyOnChangeRequest = true // I would argue that we should be opinionated and put it with a default of false
}

And possibly be overridable per step, like:

notOnChangeRequest { // PR on GitHub & Bitbucket, patchset on Gerrit, Review Request in ReviewBoard...
   sh "deploy-to-production.sh"
}

For when and usual stage deactivations:

when {
    branch CHANGE_REQUEST
}

WDYT?

Thanks!