Jenkins delete builds older than latest 20 builds for all jobs

Question

I am in the process of cleaning up Jenkins (it was setup incorrectly) and I need to delete builds that are older than the latest 20 builds for every job.

Is there an

Answer 1

I got an issue No such property: builds for class: com.cloudbees.hudson.plugins.folder.Folder on Folders Plugin 6.6 while running @Dave Bacher's script

Alter it to use functional api

import jenkins.model.Jenkins
import hudson.model.Job

MAX_BUILDS = 5
Jenkins.instance.getAllItems(Job.class).each { job ->
  println job.name
  def recent = job.builds.limit(MAX_BUILDS)
  for (build in job.builds) {
    if (!recent.contains(build)) {
      println "Preparing to delete: " + build
      build.delete()
    }
  }
}