TallerCiCd/Jenkinsfile

pipeline {
  agent none

  options {
    timestamps()
  }

  environment {
    CI = 'true'
    NODE_OPTIONS = '--max_old_space_size=2048'
    APP_VERSION = "1.0.${BUILD_NUMBER}"
    DOCKER_BUILDKIT = '1'
  }

  stages {

    stage('Init') {
      agent any
      steps {
        script {
          env.COMMIT_AUTHOR = sh(
            script: "git show -s --format=%an HEAD",
            returnStdout: true
          ).trim()

          env.COMMIT_SHORT = sh(
            script: "git rev-parse --short HEAD",
            returnStdout: true
          ).trim()
        }
      }
    }

    stage('Backend: lint & test') {
      agent {
        docker {
          image 'python:3.11-slim'
          args '-u root'
        }
      }
      steps {
        dir('backend') {
          sh '''
          set -e
          python -m venv .venv
          . .venv/bin/activate
          pip install --upgrade pip
          pip install -r requirements-dev.txt
          ruff check app tests
          pytest
          '''
        }
      }
    }

    stage('Frontend: check & build') {
      agent {
        docker {
          image 'node:20-slim'
        }
      }
      steps {
        dir('frontend') {
          sh '''
          set -e
          npm install --no-progress --no-audit --prefer-offline
          npm run check
          npm run build
          '''
        }
      }
    }

    stage('Docker: build images') {
      agent any
      steps {
        sh '''
        set -e

        docker build \
          --build-arg APP_VERSION=${APP_VERSION} \
          --build-arg GIT_COMMIT=${COMMIT_SHORT} \
          --build-arg COMMIT_AUTHOR="${COMMIT_AUTHOR}" \
          --build-arg BUILD_NUMBER=${BUILD_NUMBER} \
          -t cafeteria-backend:latest \
          -t cafeteria-backend:${BUILD_NUMBER} \
          ./backend

        docker build \
          -t cafeteria-frontend:latest \
          -t cafeteria-frontend:${BUILD_NUMBER} \
          ./frontend
        '''
      }
    }

    stage('Deploy frontend & backend') {
      when {
        branch 'main'
      }

      agent any
        environment {
            JENKINS_BASE_URL = 'http://jenkins:8080'
            JENKINS_JOB_NAME = 'Espetos'
        }
      steps {
            withCredentials([
                usernamePassword(
                    credentialsId: 'jenkins-api-token',
                    usernameVariable: 'JENKINS_USER',
                    passwordVariable: 'JENKINS_TOKEN'
                )
            ]) {
        sh '''
        set -e

        : "${BACKEND_PORT:?Missing BACKEND_PORT}"
        : "${BACKEND_HEALTH_URL:?Missing BACKEND_HEALTH_URL}"
        : "${FRONTEND_PORT:?Missing FRONTEND_PORT}"
        : "${FRONTEND_HEALTH_URL:?Missing FRONTEND_HEALTH_URL}"


        # Backend
        docker tag cafeteria-backend:latest cafeteria-backend:previous || true
        docker rm -f cafeteria-backend  2>/dev/null || true

        docker run -d \
          --name cafeteria-backend \
          -p "$BACKEND_PORT":"$BACKEND_PORT" \
          cafeteria-backend:latest

        sleep 5

        if ! curl -fs "$BACKEND_HEALTH_URL"; then
            echo "Backend failed, rollback"
            docker rm -f cafeteria-backend
            docker run -d \
                --name cafeteria-backend \
                --network ci-net \
            -e JENKINS_BASE_URL \
            -e JENKINS_JOB_NAME \
            -e JENKINS_USER \
            -e JENKINS_TOKEN \
            -p "$BACKEND_PORT":"$BACKEND_PORT" \
                cafeteria-backend:previous
            exit 1
        fi

        # Frontend
        docker tag cafeteria-frontend:latest cafeteria-frontend:previous || true
        docker rm -f cafeteria-frontend 2>/dev/null || true

        docker run -d \
          --name cafeteria-frontend \
          -p "$FRONTEND_PORT":80 \
          cafeteria-frontend:latest

        sleep 3

        if ! curl -fs "$FRONTEND_HEALTH_URL"; then
            echo "Frontend failed, rollback"
            docker rm -f cafeteria-frontend
            docker run -d \
                --name cafeteria-frontend \
                -p "$FRONTEND_PORT":80 \
                cafeteria-frontend:previous
            exit 1
        fi
        '''
      }
        }
    }
  }

  post {
    always {
      sh '''
      docker image prune -a -f || true
      docker builder prune -a -f || true
      '''
      cleanWs()
    }
  }
}