When using the Pipelines plugin, you may have noticed that all your pipeline logic must be in your Jenkinsfile.

If you want to split some of the stages in separated Groovy files, they won’t be loaded when executing the Jenkinsfile as they are not in the Groovy classpath.

One way to solve that issue is to use Jenkins Shared Library + @Library annotation in your code.

If you want to avoid sharing those classes to all the other pipelines, you can use the way described below.

Jenkins Pipeline source code structure

Let’s say you have a Pipeline “MyPipeline” committed in some Git repository and structured like that:

+-- src
    +-- MyClass.groovy
+-- Jenkinsfile

What you want to do is make Jenkinsfile call methods inside MyClass.groovy

Groovy class to load: src/MyClass.groovy

print("Loaded class MyClass.groovy")

String testMethod() {
  return "OK!"

return this

Main Pipeline Code: Jenkinsfile

pipeline {
  agent { docker 'maven:3-alpine' } 
  stages {
    stage('Example Build') {
      steps {
        def MyClass = load "src/MyClass.groovy"
        print "Result " + MyClass.testMethod()


Now try again to run the job where the pipeline “MyPipeline” is being used, and you should see in the logs:

Result OK!

One drawback of using that method is that you loose the IDE capabilities (autocompletion, error checking, …) when writing the Jenkinsfile.

Tested with Jenkins 2.176.1