Jenkins - abort running build if new one is started

Question

I use Jenkins and Multibranch Pipeline. I have a job for each active git branch. New build is triggered by push in git repository. What I want is to abort running builds in

Answer 1

I also compiled a version from the previously given ones with a few minor tweaks:

• the while() loop generated multiple outputs for each build
• the UserInterruption currently expects a userId instead of a reasoning string, and will not show a reasoning string anywhere. Therefore this just provides the userId

def killOldBuilds(userAborting) {
    def killedBuilds = []
    while(currentBuild.rawBuild.getPreviousBuildInProgress() != null) {
        def build = currentBuild.rawBuild.getPreviousBuildInProgress()
        def exec = build.getExecutor()

        if (build.number != currentBuild.number && exec != null && !killedBuilds.contains(build.number)) {
            exec.interrupt(
                    Result.ABORTED,
                    // The line below actually requires a userId, and doesn't output this text anywhere
                    new CauseOfInterruption.UserInterruption(
                            "${userAborting}"
                    )
            )
            println("Aborted previous running build #${build.number}")
            killedBuilds.add(build.number)
        }
    }
}