Global shared library configuration in Jenkins - Mini Project: Build & Apply

Global Shared Library Configuration in Jenkins

📖 Scenario: You work in a team that uses Jenkins for automation. To reuse common pipeline code, your team wants to set up a global shared library in Jenkins. This library will hold reusable scripts and steps for all Jenkins pipelines.

🎯 Goal: Learn how to configure a global shared library in Jenkins by defining its name, repository, and default version. Then, use it in a simple Jenkins pipeline.

📋 What You'll Learn

Create a global shared library configuration dictionary with exact keys and values

Add a configuration variable for the default branch of the library

Write the Jenkins pipeline code that uses the shared library

Print the pipeline script output to verify the library usage

💡 Why This Matters

🌍 Real World

Teams use global shared libraries in Jenkins to reuse common pipeline code, reducing duplication and errors.

💼 Career

Knowing how to configure and use shared libraries is essential for Jenkins pipeline developers and DevOps engineers to build scalable automation.

1

Create the global shared library configuration dictionary

Create a dictionary called global_shared_library with these exact entries: name set to "my-shared-lib", repository set to "https://github.com/example/my-shared-lib.git", and default_version set to "master".

Jenkins

# Create the global_shared_library dictionary with name, repository, and default_version
# Your code here

Need a hint?

Use curly braces {} to create a dictionary. Use exact keys and values as strings.

2

Add a configuration variable for the default branch

Add a variable called default_branch and set it to the string "main" to represent the default branch of the shared library.

Jenkins

global_shared_library = {
    "name": "my-shared-lib",
    "repository": "https://github.com/example/my-shared-lib.git",
    "default_version": "master"
}

# Add the default_branch variable below
# Your code here

Need a hint?

Use a simple assignment statement to create the variable default_branch.

3

Write the Jenkins pipeline code that uses the shared library

Write a string variable called pipeline_script that contains this exact Jenkins pipeline code using the shared library my-shared-lib with the default branch main:

"""
library('my-shared-lib@main')
pipeline {
    agent any
    stages {
        stage('Example') {
            steps {
                echo 'Using shared library'
            }
        }
    }
}
"""

Jenkins

global_shared_library = {
    "name": "my-shared-lib",
    "repository": "https://github.com/example/my-shared-lib.git",
    "default_version": "master"
}

default_branch = "main"

# Write the pipeline_script string with the Jenkins pipeline code below
# Your code here

Need a hint?

Use triple quotes """ to create a multi-line string. Include the exact pipeline code inside.

4

Print the pipeline script output

Write a print statement to display the contents of the pipeline_script variable.

Jenkins

global_shared_library = {
    "name": "my-shared-lib",
    "repository": "https://github.com/example/my-shared-lib.git",
    "default_version": "master"
}

default_branch = "main"

pipeline_script = """
library('my-shared-lib@main')
pipeline {
    agent any
    stages {
        stage('Example') {
            steps {
                echo 'Using shared library'
            }
        }
    }
}
"""

# Print the pipeline_script variable below
# Your code here

Need a hint?

Use print(pipeline_script) to show the pipeline code.