Delete old Jenkins pipeline job builds

deletePipelineOldBuilds.groovy

import java.util.ArrayList


def MULTIBRANCH_JOBNAME = "project"
def BRANCH_NAME = "develop"
def MAX_TO_KEEP = 10

def hi = hudson.model.Hudson.instance
def item = hi.getItemByFullName(MULTIBRANCH_JOBNAME)
def jobs = item.getAllJobs()

Iterator<?> iterator = jobs.iterator()

while (iterator.hasNext()) {
    def job = iterator.next()
    def recent = job.builds.limit(MAX_TO_KEEP)
    if (job.name != BRANCH_NAME) {
        continue
    }
    for (build in job.builds) {
      if (!recent.contains(build)) {
          println "Preparing to delete: " + build
          build.delete()
      }
    }
}