Jenkins : Convert standard mail notifications to use the Mail-Ext Publisher plugin

This script replace mail notifications in all projects by Mail-Ext publisher plugin and re-uses existing recipients.
The Mail-Ext is configured with :

Recipient list : current recipient list defined in the project (the MailExt isn't activated if the project doesn't have yet a mail notification)
Mail subject : default subject from global config
Mail body : default body from global config
Triggers : Failure, StillFailing, Unstable, StillUnstable, Fixed triggers are activated and send mails to the recipient list

It was tested on Freestyle and Maven projects with Hudson 1.346.

import hudson.plugins.emailext.*
import hudson.plugins.emailext.plugins.trigger.*
import hudson.model.*
import hudson.maven.*
import hudson.maven.reporters.*
import hudson.tasks.*

// For each project
for(item in Hudson.instance.items) {
  def recipients
  println("JOB : "+item.name);
  
  // Find current recipients defined in project
  
  if(item instanceof MavenModuleSet) {
    println(">MAVEN MODULE SET");
    
    // Search for Maven Mailer Reporter
    println(">>Reporters");    
    for(reporter in item.reporters) {
      println(">>> "+reporter);
      if(reporter instanceof MavenMailer) {
        // save recipients
        recipients = reporter.recipients
        // remove reporter
        item.reporters.remove(reporter)
      }
    }
  } else
  if(item instanceof FreeStyleProject) {
    println(">FREESTYLE PROJECT");
  }

  println(">>Publishers");    
  for(publisher in item.publishersList) {
    println(">>> "+publisher);
    // Search for default Mailer Publisher (doesn't exist for Maven projects)
    if(publisher instanceof Mailer) {
      // save recipients
      recipients = publisher.recipients
      // remove publisher
      item.publishersList.remove(publisher)
    } else
    // Or for Extended Email Publisher
    if(publisher instanceof ExtendedEmailPublisher) {
      // save recipients (if it already exist it overrides others values)
      recipients = publisher.recipientList
      item.publishers.remove(publisher)
      // remove it
      item.publishersList.remove(publisher)
    }
  }
  
  // If we found recipients list to send mail
  if(recipients!=null){
    println (">CURRENT RECIPIENT : "+recipients)
    // We create a new Extended Email Publisher
    def eep = new ExtendedEmailPublisher();
    eep.recipientList = recipients
    eep.defaultSubject = "\$DEFAULT_SUBJECT"
    eep.defaultContent = "\$DEFAULT_CONTENT"
    // With some triggers
    eep.configuredTriggers.add(new FailureTrigger(
      email : new EmailType(
        sendToRecipientList : true,
        sendToDevelopers : true,
        includeCulprits : true, 
        body : ExtendedEmailPublisher.PROJECT_DEFAULT_BODY_TEXT, 
        subject : ExtendedEmailPublisher.PROJECT_DEFAULT_SUBJECT_TEXT )))
    eep.configuredTriggers.add(new FixedTrigger(
      email : new EmailType(
        sendToRecipientList : true, 
        sendToDevelopers : true,
        includeCulprits : true, 
        body : ExtendedEmailPublisher.PROJECT_DEFAULT_BODY_TEXT, 
        subject : ExtendedEmailPublisher.PROJECT_DEFAULT_SUBJECT_TEXT )))
    eep.configuredTriggers.add(new StillFailingTrigger(
      email : new EmailType(
        sendToRecipientList : true, 
        sendToDevelopers : true,
        includeCulprits : true, 
        body : ExtendedEmailPublisher.PROJECT_DEFAULT_BODY_TEXT, 
        subject : ExtendedEmailPublisher.PROJECT_DEFAULT_SUBJECT_TEXT )))
    eep.configuredTriggers.add(new StillUnstableTrigger(
      email : new EmailType(
        sendToRecipientList : true, 
        sendToDevelopers : true,
        includeCulprits : true, 
        body : ExtendedEmailPublisher.PROJECT_DEFAULT_BODY_TEXT, 
        subject : ExtendedEmailPublisher.PROJECT_DEFAULT_SUBJECT_TEXT )))
    eep.configuredTriggers.add(new UnstableTrigger(
      email : new EmailType(
        sendToRecipientList : true, 
        sendToDevelopers : true,
        includeCulprits : true, 
        body : ExtendedEmailPublisher.PROJECT_DEFAULT_BODY_TEXT, 
        subject : ExtendedEmailPublisher.PROJECT_DEFAULT_SUBJECT_TEXT )))
    // And we add/replace it in the project
    item.publishersList.replace(eep);
  }else{
    println (">NO RECIPIENT")
  }
   
  println("\n=======\n");
}