Kill all queued jenkins jobs

Delete historic hobs and some workspaces

MAX_BUILDS = 5
MAX_ENV_BUILDS = 2

Jenkins.instance.getAllItems(org.jenkinsci.plugins.workflow.job.WorkflowJob.class).each { it ->
  def job = Jenkins.instance.getItemByFullName(it.fullName, Job.class)
  def limit = (it.fullName =~ /^environment/) ? MAX_ENV_BUILDS : MAX_BUILDS
  def recent = job.getBuilds().limit(limit)
  println "Processing job " + it.fullName + " " + it.class + " BuildCount: " + job.getBuilds().size() + " Limit: " + limit
  
  
  for (build in job.getBuilds()) {
    //println "Considering: " + build
    if (!recent.contains(build)) {
      println "Deleting build from job " + it
      // Delete build
      build.delete()
    }
  }
};

  
jenkins.model.Jenkins.instance.getAllItems(hudson.model.AbstractProject).each { job ->
  if (job.building) {
    println "Skipping job $job.name, currently building"
  } else {
    println "Wiping out workspace of $job.name"
    job.doDoWipeOutWorkspace()
  }
}
 print "Done!"

kill_deploy_jobs.groovy

import hudson.model.*

def q = Jenkins.instance.queue

q.items.each {
  if (it =~ /deploy-to/) {
    q.cancel(it.task)
  }
}

kill_queued_jenkins.groovy

import hudson.model.*

def q = Jenkins.instance.queue

q.items.each { q.cancel(it.task) }

Kill all 'queued deploy' jobs:

import hudson.model.*

def q = Jenkins.instance.queue

q.items.each { 
  if (it =~ /deploy-to/) {
  	q.cancel(it.task)
  }
}

why not just

import hudson.model.*
def queue = Hudson.instance.queue
println "Queue contains ${queue.items.length} items"
queue.clear()
println "Queue cleared"

src: https://github.com/jenkinsci/jenkins-scripts/blob/master/scriptler/clearBuildQueue.groovy