[Kill All Builds] kill all queued and running jobs #Jenkins

kill_all.groovy

import java.util.ArrayList
import hudson.model.*;

// Remove everything which is currently queued
def q = Jenkins.instance.queue
for (queued in Jenkins.instance.queue.items) {
  q.cancel(queued.task)
}

// stop all the currently running jobs
for (job in Jenkins.instance.items) {
  stopJobs(job)
}

def stopJobs(job) {
  if (job in com.cloudbees.hudson.plugins.folder.Folder) {
    for (child in job.items) {
      stopJobs(child)
    }    
  } else if (job in org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProject) {
    for (child in job.items) {
      stopJobs(child)
    }
  } else if (job in org.jenkinsci.plugins.workflow.job.WorkflowJob) {
    
    if (job.isBuilding()) {
      for (build in job.builds) {
        build.doKill()
      }
    }
  }
}