Declarative pipeline syntax in Jenkins - Mini Project: Build & Apply

Build a Simple Jenkins Declarative Pipeline

📖 Scenario: You are setting up a Jenkins pipeline to automate a simple build process for a software project. This pipeline will have stages to prepare, build, and test the project.

🎯 Goal: Build a Jenkins declarative pipeline script with three stages: Prepare, Build, and Test. Each stage will run a simple shell command to simulate the step.

📋 What You'll Learn

Use declarative pipeline syntax starting with pipeline block

Define an agent any to run the pipeline on any available agent

Create three stages named Prepare, Build, and Test

In each stage, run a shell command using sh step with exact commands provided

💡 Why This Matters

🌍 Real World

Jenkins pipelines automate software build, test, and deployment processes to save time and reduce errors.

💼 Career

Understanding declarative pipelines is essential for DevOps engineers and automation specialists working with Jenkins.

1

Create the pipeline block with agent

Write a Jenkins declarative pipeline script starting with pipeline block and add agent any inside it.

Jenkins

pipeline {
    // Your code here
}

Need a hint?

The pipeline block is the root of the script. Inside it, add agent any to specify the pipeline runs on any available agent.

2

Add the Prepare stage with shell command

Inside the pipeline block, add a stages block. Then add a stage named Prepare that runs the shell command echo Preparing environment using sh step.

Jenkins

pipeline {
    agent any
    // Your code here
}

Need a hint?

Use stages block to group stages. Each stage has a steps block where you run commands with sh.

3

Add Build and Test stages with shell commands

Inside the existing stages block, add two more stages named Build and Test. In Build, run sh 'echo Building project'. In Test, run sh 'echo Running tests'.

Jenkins

pipeline {
    agent any
    stages {
        stage('Prepare') {
            steps {
                sh 'echo Preparing environment'
            }
        }
        // Your code here
    }
}

Need a hint?

Add multiple stage blocks inside stages. Each stage has its own steps with shell commands.

4

Print the pipeline script to verify

Print the entire Jenkins pipeline script to verify it contains all stages and commands.

Jenkins

pipeline {
    agent any
    stages {
        stage('Prepare') {
            steps {
                sh 'echo Preparing environment'
            }
        }
        stage('Build') {
            steps {
                sh 'echo Building project'
            }
        }
        stage('Test') {
            steps {
                sh 'echo Running tests'
            }
        }
    }
}

// Your code here

Need a hint?

Use println to show a confirmation message that the pipeline script is complete.