def projects = Jenkins.instance.projects.collect { it } // 獲取自由風格的所有項目，注意，只能獲取自由風格項目
println(projects) // 輸出：[hudson.model.FreeStyleProject@4b8b02d[AutoTest-OMG], hudson.model.FreeStyleProject@2b953627[AutoTest-QDD],...,]
for(def project : projects) { 
  println(project.name)  // 獲取項目名稱 
  println(project.getBuilds()) // 獲取構建記錄，輸出：[AutoTest-OMG #190, AutoTest-OMG #189, ...,]
  println(job.nextBuildNumber) // 獲取下一次構建號，形如：256
}

def jobNames = Jenkins.instance.getJobNames()
for (def jobName : jobNames) {
  println(jobName) // 注意：如果是多分支項目，則輸出名稱為fullName，形如：alpha-Deployer/vip

}

def jobNames = Jenkins.instance.getJobNames()
for (def jobName : jobNames) {
    def job = Jenkins.instance.getItemByFullName(jobName)
    job.getBuilds().findAll { it.number < job.nextBuildNumber - 5 }.each { it.delete() } 
}

def projectName = "FREE-STYLE-PROJECT" // 項目名稱
def project = Jenkins.instance.getItem(projectName)
project.getBuilds().findAll { it.number > 10 }.each { it.delete() } 

def jobName = "FREE-STYLE-PROJECT" // 項目名稱
def job = Jenkins.instance.getItem(jobName) // 本行代碼也可以使用 def job = Jenkins.instance.getItemByFullName(jobName) 替代
println(job.getClass()) // 輸出：org.jenkinsci.plugins.workflow.job.WorkflowJob
println(job.getBuilds().getClass()) // 輸出：class hudson.util.RunList
job.getBuilds().each { println(it.getClass()) } // 輸出：class org.jenkinsci.plugins.workflow.job.WorkflowRun
job.getBuilds().each { it.delete() } // 刪除所有構建記錄

def jobName = "CI-Builder/omg"
def job = Jenkins.instance.getItemByFullName(jobName) 
job.getBuilds().each { it.delete() }

def projectName = "CI-Builder"
def project = Jenkins.instance.getItem(projectName) 
def jobs = project.getItems().each {
  def job = it
  job.getBuilds().each { 
    it.delete() 
  }
  job.nextBuildNumber = 1
  job.save()
}