Jenkinsfile

// This Jenkinsfile defines a CI/CD pipeline for a Node.js application using Docker on Windows.
pipeline {
    agent any

    // Define the stages for the pipeline
    stages {

        // Checkout the source code from the Git repository
        stage('Checkout Source') {
            steps {
                git branch: 'main', url: 'https://github.com/PAIshanMadusha/node-docker-jenkins-cicd-pipeline.git'
            }
        }

        // Install project dependencies
        stage('Install Dependencies') {
            steps {
                bat 'npm install'
            }
        }

        // Run tests
        stage('Run Tests') {
            steps {
                bat 'npm test'
            }
        }

        // Replace your Docker Hub username and password with these Jenkins credentials
        // Build Docker image
        stage('Build Docker Image') {
            steps {
                bat "docker build -t ishanmadusha/node-docker-jenkins-cicd-pipeline:%BUILD_NUMBER% ."
            }
        }

        // Login to Docker Hub
        stage('Login to Docker Hub') {
            steps {
                // Docker Hub credentials are stored in Jenkins credentials 
                withCredentials([string(credentialsId: 'text-dockerhub-password', variable: 'text-dockerhub-pass')]) {
                    bat "echo %text-dockerhub-pass% | docker login -u ishanmadusha --password-stdin"
                }
            }
        }

        // Push Docker image
        stage('Push Docker Image') {
            steps {
                bat "docker push ishanmadusha/node-docker-jenkins-cicd-pipeline:%BUILD_NUMBER%"
                // Optional: also tag as 'latest'
                bat "docker tag ishanmadusha/node-docker-jenkins-cicd-pipeline:%BUILD_NUMBER% ishanmadusha/node-docker-jenkins-cicd-pipeline:latest"
                bat "docker push ishanmadusha/node-docker-jenkins-cicd-pipeline:latest"
            }
        }

        // Deploy the container
        stage('Deploy Container') {

            // Running the container with secret .env file
            steps {
                withCredentials([file(credentialsId: 'nodeapp-env-file', variable: 'ENV_FILE')]) {
                    // Stop old container (ignore errors if not running)
                    bat 'docker rm -f node-crud-app || exit 0'
                    // Run new container with secret .env file
                    bat "docker run -d --name node-crud-app --env-file %ENV_FILE% -p 3000:3000 ishanmadusha/node-docker-jenkins-cicd-pipeline:%BUILD_NUMBER%"
                }
            }
        }
    }

    post {
        always {
            // Clean up Docker resources
            bat 'docker logout'
        }
    }
}