Jenkins - Cleanup old builds

jenkins-cleanup-old-builds.groovy

import com.cloudbees.hudson.plugins.folder.*;

/**
 * Utility function used to delete old builds associated to a Jenkins project.
 *
 * @param item the current Jenkins item to process, this can be a Folder or a Project
 * @param numberOfBuildsToKeep the total number of builds to keep. Please note that one more build could be 
 *        kept if the firt "numberOfBuildsToKeep" builds are all in failed state.
 */
def deleteOldBuilds(item, numberOfBuildsToKeep) {
  
  // If the item is a project then remove its old builds
  if(item instanceof Project) {
  
    def i = 1
    def numberOfSuccessfulBuildsKept = 0
  
    println ""
    println "Begin deletion of old builds for project \"" + item.getName() + "\"..."
    
    for (build in item.getBuilds()) {
      
      if(i++ > numberOfBuildsToKeep) {
        if(item.getBuildStatusIconClassName() == "icon-blue" && numberOfSuccessfulBuildsKept == 0) {
          println "Keep " + build
        } else {
          println "Delete " + build
          build.delete()
        }
      } else if(item.getBuildStatusIconClassName() == "icon-blue") {
        numberOfSuccessfulBuildsKept++;
      }
      
    }
    
  }
  
  // If the item is a folder then execute recursive call
  else if(item instanceof Folder) {
    for (subItem in item.items) {
      deleteOldBuilds(subItem, numberOfBuildsToKeep);
    }
  }
}

// For each root item
for (item in Jenkins.instance.items) {
  deleteOldBuilds(item, 3);
}