remove all jenkins builds

remove-all-builds.java

import hudson.model.*
// For each project
for(item in Hudson.instance.items) {
  // check that job is not building
  if(!item.isBuilding()) {
    System.out.println("Deleting all builds of job "+item.name)
    for(build in item.getBuilds()){
      build.delete()
    }  
  }
  else {
    System.out.println("Skipping job "+item.name+", currently building")
  }
}