How to validate the transformer of a job template using the Script Console?

Article ID:115002011431
1 minute readKnowledge base


  • As a Jenkins admin, I would like to validate the job transformer via Script Console


  • CloudBees Jenkins Enterprise - Managed controller (CJEMM) CloudBees Jenkins Template Plugin



The following script illustrates how to solve the issue. For Case A the transformer is OK whereas for Case B not.


  1. Please make a backup of your $JENKINS_HOME before running it.

  2. Overall - RunScripts (admin) permission is needed in order to run it.

import com.cloudbees.hudson.plugins.modeling.ModelList
import com.cloudbees.hudson.plugins.modeling.impl.jobTemplate.InstanceFromJobTemplate
import com.cloudbees.hudson.plugins.modeling.impl.jobTemplate.JobPropertyImpl

// getAllItems type JobTemplate and then filtering by item name
def MyTemplate1= Jenkins.instance.getAllItems(com.cloudbees.hudson.plugins.modeling.impl.jobTemplate.JobTemplate).find{job->"My Template Example 1"}
// getItem() needs full name as described in
def MyTemplate2= ModelList.get().getItem("SUPPORT-Team/Templates/My Template Example 2")

println "CASE A: Transformer OK"
println "----------------------"

    println "[INFO] : $ transformer is OK"
}catch (Exception e){
    println "[ERROR] :"+ e.toString()

println "\n\n"
println "CASE B: Transformer with Errors"
println "----------------------"
    println "[INFO] : $ transformer is OK"
}catch (Exception e){
    println "[ERROR] :"+ e.toString()

Console Output

CASE A: Transformer OK
[INFO] : My Template Example 1 transformer is OK

CASE B: Transformer with Errors
[ERROR] :groovy.lang.GroovyRuntimeException: Failed to parse template script (your template may contain an error or be trying to use expressions not currently supported): startup failed:
SimpleTemplateScript28.groovy: 83: unexpected token: & @ line 83, column 41.
   lease_to_Artifactory=="Yes" &&& !!! bla bla

1 error

Tested product/plugin versions

The latest update of this article was tested with:

  • CloudBees Jenkins Template: 4.33