[SOLVED] How to invoke groovy templates in the Jenkins email-ext plugin

How to invoke groovy templates in the Jenkins email-ext plugin

I want to use the Groovy scripting feature in the email-ext plugin for Jenkins, but I'm new to this and there seems to be a lot of assumed knowledge. Like how one goes about invoking one of these templates in the first place.

The answer to this is probably quite obvious, but I'm feeling a bit lost and would appreciate being pointed in the right direction.

Solution

This example is based on the official email-ext documentation, which unfortunately does not provide any concrete examples on how to use the $SCRIPT line of code in Pipeline. If you wish to use an HTML template as the body for your email then you need to:

Create a template file called my-email.template or whatever you like - you can find some template examples here

<body>
  <h3>Using "build" environment variables:</h3>
  <p>
    <a href="<%= build.absoluteUrl %>"><%= build.fullDisplayName %></a>
  </p>
  <h3>List of all available "build" environment variables:</h3>
  <div>
    <% println build.properties.collect{it}.join('<br />') %>
  </div>
</body>

Have your Jenkins administrator place the my-email.template file inside $JENKINS_HOME\email-templates directory on Jenkins machine - make sure that user jenkins owns this directory as well as its content (i.e. template files)

In Pipeline load my-email.template as body content:

stage('Send email') {
    def mailRecipients = "jenkins-user@example.com"
    def jobName = currentBuild.fullDisplayName

    emailext body: '''${SCRIPT, template="my-email.template"}''',
    subject: "[Jenkins] ${jobName}",
    to: "${mailRecipients}",
    replyTo: "${mailRecipients}",
    recipientProviders: [[$class: 'CulpritsRecipientProvider']]
}