What is a Jenkinsfile?

A Jenkinsfile is a text file that contains the definition of a Jenkins pipeline. It is used to define the steps and stages of the continuous integration and continuous delivery (CI/CD) process in Jenkins. The Jenkinsfile can be written in either Declarative or Scripted Pipeline syntax.

Key Features:

• Version Control: It can be stored in the same repository as the code, allowing versioning.
• Pipeline as Code: Enables the definition of the build process in code, making it easier to manage and maintain.
• Stages and Steps: Organizes the workflow into stages (e.g., build, test, deploy) and steps (individual tasks).

Example of a Simple Jenkinsfile (Declarative Syntax):

pipeline {
    agent any 
    stages {
        stage('Build') {
            steps {
                echo 'Building...'
            }
        }
        stage('Test') {
            steps {
                echo 'Testing...'
            }
        }
        stage('Deploy') {
            steps {
                echo 'Deploying...'
            }
        }
    }
}

This example outlines a basic pipeline with three stages: Build, Test, and Deploy.