1.删除所有的Jenkins中的Job的编译历史并重置build号

import hudson.model.*
def items = Hudson.instance.allItems

items.each { item ->

  if (item instanceof Job) {

    def builds = item.getBuilds()

    builds.each { build ->
      def since = groovy.time.TimeCategory.minus( new Date(), build.getTime() )
      def status = build.getBuildStatusSummary().message
      println "Build: ${build} | Since: ${since} | Status: ${status}" 
      build.delete()
    }
    
    item.nextBuildNumber = 1
    item.save()
  }
}
return

2.删除某个Job的Jenkins中编译历史并重置build号

import hudson.model.*
def item = jenkins.model.Jenkins.instance.getItem("Job名字");
def builds = item.getBuilds()

builds.each { build ->
def since = groovy.time.TimeCategory.minus( new Date(), build.getTime() )
   def status = build.getBuildStatusSummary().message
   println "Build: ${build} | Since: ${since} | Status: ${status}" 
   build.delete()
}
item.nextBuildNumber = 1
item.save()
return

3.将所有的Jenkins的Job的保留的编译build历史数量（保证Jenkins所在机器的健康性）

import hudson.model.*
def items = Hudson.instance.allItems

items.each { item ->

  if (item instanceof Job) {
    item.logRotator = new hudson.tasks.LogRotator ( "", "10", "", "")
        println "$item.name fixed "
    
  }
}
return