Declarative pipelines were created to allow users create pipelines without learning Groovy programming.

Declarative pipeline example

• Create a new pipeline, as we've done in

  pipelines-primer-1 post
  ...but...

• Choose GitHub + Maven example, which is the same as the one we have covered in

  scripted-pipelines, …

Scripted pipelines are using Groovy language syntax to achieve part of the requirements for a pipeline.
The other option (that we'll cover in another post) is Declarative syntax.

Scripted Pipeline example

• Create a pipeline as explained in

  pipelines-primer-1 but select Scripted Pipeline from the dropdown …

Let's add some scm (source control management) abilities to our pipelines.

SCM

• We can add one more stage to the pipeline created in the

  previous post that will be used to clone a git repository

• I'll be using checkout: Check out from version control (that has more options than git:Git)
• Using the Pipeline Syntax …

Configure Credentials

This is optional if you intend to leave you repository public for now.

Configure label for node

• The pipeline we use spcifies which agent should run it (I use workers in my example):

1agent { label 'workers' }

• So, I'd label my controller with that
• Go to:
  Dashboard->Manage Jenkins …

(these terms are coppied with some additions from here).

• Controller The central, coordinating process which stores configuration, loads plugins, and renders the various user interfaces for Jenkins.
• Agent - An agent is typically a machine, or container, which connects to a Jenkins controller and executes tasks when …

In this walkthrough we'll create a new project (job).
Note that Jenkins GUI looks better in Chrome, so you can go ahead and install Chrome in your linux machine.

Create an example project

• Create the job
  • Click on New Item
  • fill my_freestyle in the top edit fiels (project name)
  • Select Freestyle Project
  • click on OK at …

Jenkins after installation

This is how my jenkins page was looking just after I have installed it and logged in.
You can see my login information at the top-right corner.

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  loading="lazy"
  decoding="async" …</picture></figure></p>