Shashanksr6694 / jenkinsapp

jenkins-examples

This is a repository of simple Jenkins examples.

Most examples at present use the Jenkins pipeline feature introduced around Jenkins 1.6, so keep the following docs handy:

1. basic doc
2. command reference

Prerequisites

You should have a Jenkins instance to try this out on. The easiest way is to download it for your operating system but you can also run a Jenkins Docker container..

Using the examples

Each hello-world-* folder contains a Jenkinsfile which demonstrates a basic Pipeline concept. To try out each example, read the README file located in each folder.

What order should you follow?

1. hello-world
2. hello-world-2
3. hello-world-3

And other hello-world-* examples sequentially.

Troubleshooting

java.lang.NullPointerException: Cannot invoke method on null object

You might encounter an error similar to the following when executing a pipeline:

    java.lang.NullPointerException: Cannot invoke method getRandom() on null object
    at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:48)
            at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)

One situation where this error is encountered, is when

• you load a groovy script from your Jenkinsfile but
• that script has not been terminated with return this.