ReactJS, AWS, CircleCI 2.0 configuration file.

config.yml

# ReactJS, AWS, CircleCI 2.0 configuration file.
version: 2
jobs:
  build-job:
    docker:
      # specify the version you desire here
      - image: circleci/node:7.10
      
    working_directory: ~/repo

    steps:
      - checkout

      # Download and cache dependencies
      - restore_cache:
          keys:
          - v1-dependencies-{{ checksum "package.json" }}
          # fallback to using the latest cache if no exact match is found
          - v1-dependencies-

      - run: yarn install

      - save_cache:
          paths:
            - node_modules
          key: v1-dependencies-{{ checksum "package.json" }}
        
      # run tests!
      - run: yarn run lint
      - run: yarn test
  
  deploy-job-prod:
    docker:
      - image: circleci/node:7.10
    working_directory: ~/repo
    steps:
      - checkout
      # Download and cache dependencies
      - restore_cache:
          keys:
          - v1-dependencies-{{ checksum "package.json" }}
          # fallback to using the latest cache if no exact match is found
          - v1-dependencies-

      - run: yarn install
      - run: sudo apt-get install awscli
      - run: yarn build
      - run:
          name: Deploy to S3 if tests pass and branch is prod
          command: aws s3 sync build/ s3://app.example.com --delete --region ap-southeast-1
      # TODO: Consider only invalidating index.html
      - run:
          name: Enable AWS CLI preview features
          command: |
                  aws configure set preview.cloudfront true
                  aws configure set preview.create-invalidation true
      - run:
          name: Invalidate cloudfront content
          command: |
                  timestamp=$(date +%s)
                  command=$(printf '{"Paths":{"Quantity":1,"Items":["/*"]},"CallerReference":"circleci-%s"}' $timestamp)
                  echo $command > invbatch.json
                  aws cloudfront create-invalidation --distribution-id XXXXYYYYZZZZ --invalidation-batch file://invbatch.json

workflows:
  version: 2
  build-deploy:
    jobs:
      - build-job
      - deploy-job-prod:
          requires:
            - build-job
          filters:
            branches:
              only: prod