blog__docker-full-circle__.circleci.config.yml

defaults: &defaults
  machine:
    docker_layer_caching: true

version: 2.1
commands:
  setupenv:
    description: "Simple command to Setup Environment Variables"
    steps:
      - checkout
      - run: 
          name: Setup Environment Variables
          command: |
            echo 'export TAG=${CIRCLE_SHA1}' >> $BASH_ENV
            echo 'export IMAGE_NAME=docker_demo' >> $BASH_ENV
  cache-app:
    description: "Cache the Production Docker Image"
    parameters:
      cache:
        type: boolean
        default: false
    steps:
      - when:
          condition: <<parameters.cache>>
          steps:  
            - run:
                name: Save Docker Image
                command: |
                  mkdir -p docker-cache
                  docker save -o docker-cache/built-image.tar YOUR_DOCKER_HUB_ACCOUNT/$IMAGE_NAME:$TAG
            - save_cache:
                key: docker_cache_key-{{ .Environment.CIRCLE_SHA1 }}
                paths:
                  - docker-cache

# Job Definition List 
jobs:
  unit-test:
    <<: *defaults
    steps:
      - setupenv
      - run:
          name: Lint & Unit Test Application
          command: |
            npm run build:ci
            npm run start:ci

  build:
    <<: *defaults
    steps:
      - setupenv
      - run: 
          name: Build Production Docker Image
          command: |
            npm run build:prod

  build-and-cache:
    <<: *defaults
    steps:
      - setupenv
      - run: 
          name: Build Production Docker Image
          command: |
            npm run build:prod
      - cache-app:
          cache: true

  acceptance-test:
    <<: *defaults
    steps:
      - setupenv
      - restore_cache:
          key: docker_cache_key-{{ .Environment.CIRCLE_SHA1 }}
      - run:
          name: Load Image from Docker Cache
          command: |
            docker load < docker-cache/built-image.tar
      - run:
          name: Run End-to-End Tests
          command: |
            mkdir -p ./results/$TAG/screenshots ./results/$TAG/videos
            npm run build:cypress
            npm run start:cypress
      - store_artifacts:
          path: ./results

  publish:
    <<: *defaults
    steps:
      - setupenv
      - restore_cache:
          key: docker_cache_key-{{ .Environment.CIRCLE_SHA1 }}
      - run:
          name: Load Image from Docker Cache
          command: |
            docker load < docker-cache/built-image.tar
      - run:
          name: Publish Docker Image
          command: |
            echo $DOCKER_PWD | docker login -u $DOCKER_LOGIN --password-stdin
            docker push YOUR_DOCKER_HUB_ACCOUNT/$IMAGE_NAME:$TAG

workflows:
  version: 2.1
  build-test-acceptance-publish:
    jobs:
      - unit-test
      - build:
          requires:
            - unit-test
          filters:
            branches:
              ignore:
                - develop
                - master
      - build-and-cache:
          requires:
            - unit-test
          filters:
            branches:
              only:
                - develop
                - master
      - acceptance-test:
          requires:
            - build-and-cache
          filters:
            branches:
              only:
                - develop
                - master
      - publish:
          requires:
            - acceptance-test
          filters:
            branches:
              only:
                - develop
                - master