Receive E-Mail notifications when Jenkins plug-in updates are available

Install Groovy script plug-in via Jenkin UpdateCenter

Create a new Jenkins job and name it e.g. zPluginCheck

• Set to “Build periodically” with a reasonable schedule (once a day?!)

• Add “E-Mail notification” as a post build action

• Add an “Execute system Groovy script” build step:

  // Explicitly checking for updates works only with Jenkins >= 1.501
  // Not available in LTS release :(
  //
  //hudson.model.Hudson.instance.updateCenter.getSiteList().each(
  // {hudson.model.UpdateSite s -> s.doInvalidateData()
  //    println(s.isDue())})
  //hudson.model.Hudson.instance.updateCenter.updateAllSites()
  
  def updates = []
  hudson.model.Hudson.instance.pluginManager.plugins.inject(updates) {
      List toUpdate, p -> if(p.hasUpdate()) {
       toUpdate << "${p.longName}/${p.shortName}:${p.version}"
      }
      toUpdate
  }.inspect()
  
  if(!updates.empty) {
     println(updates)
     throw new hudson.AbortException("Found available updates.")
  }