Jenkins worksplace cleanup

set_prebuild_cleanup.groovy

import hudson.tasks.*
import hudson.plugins.ws_cleanup.*

processGroup(Jenkins.instance)

def processGroup(itemGroup) {
  for(item in itemGroup.items) {
    if (item.class.simpleName == "Folder") {
      processGroup(item)
    } else {
      hasPreClean = false;
      item.buildWrappers.values().each {
        if (it instanceof hudson.plugins.ws_cleanup.PreBuildCleanup){
          hasPreClean = true;
        }
      }
      
      if (!hasPreClean) {
        println("Adding PreClean to $item.name");
        item.getBuildWrappersList().add(new PreBuildCleanup(new ArrayList<Pattern>(), false, "", "", false));
        item.save();
      }
      else {
        println("$item.name already has pre-build cleanup enabled");
      }
    }
  }
}