Library versioning in Jenkins - Mini Project: Build & Apply

Library versioning

📖 Scenario: You are managing a Jenkins pipeline that builds a software project. The project depends on a library, and you want to control which version of the library is used during the build.This helps ensure consistent builds and easy updates.

🎯 Goal: Create a Jenkins pipeline script that defines a library version variable, uses it in the build stage, and prints the library version used.

📋 What You'll Learn

Define a variable called libraryVersion with the value 1.2.3

Use the libraryVersion variable in the build stage to simulate using that library version

Print the library version in the pipeline output

💡 Why This Matters

🌍 Real World

Managing library versions in Jenkins pipelines ensures consistent builds and easier troubleshooting.

💼 Career

DevOps engineers often need to control dependency versions in CI/CD pipelines to maintain stable software delivery.

1

Define the library version variable

Create a variable called libraryVersion and set it to the string "1.2.3" at the top of the Jenkins pipeline script.

Jenkins

# Your code here

Need a hint?

Use def libraryVersion = "1.2.3" to define the variable.

2

Add a build stage using the library version

Add a stage named Build that contains a steps block. Inside, add a echo command that prints "Building with library version: ${libraryVersion}".

Jenkins

def libraryVersion = "1.2.3"

// Your code here

Need a hint?

Use pipeline { agent any stages { stage('Build') { steps { echo "Building with library version: ${libraryVersion}" } } } }.

3

Add a post section to print the library version after build

Add a post section inside the pipeline block with a always block. Inside always, add a echo command that prints "Library version used: ${libraryVersion}".

Jenkins

def libraryVersion = "1.2.3"

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                echo "Building with library version: ${libraryVersion}"
            }
        }
    }
    // Your code here
}

Need a hint?

Add post { always { echo "Library version used: ${libraryVersion}" } } inside the pipeline.

4

Run the pipeline and display the output

Run the Jenkins pipeline script and ensure the output contains the lines Building with library version: 1.2.3 and Library version used: 1.2.3.

Jenkins

def libraryVersion = "1.2.3"

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                echo "Building with library version: ${libraryVersion}"
            }
        }
    }
    post {
        always {
            echo "Library version used: ${libraryVersion}"
        }
    }
}

// Run the pipeline and check output

Need a hint?

Run the pipeline and check the console output for the expected lines.