version: 2

# This key means nothing to CircleCI; it's just a place to keep anchored
# configuration nodes for reuse.
common_settings:
  working_directory: &workdir ~/project
  cache_key: &cachekey 'v1-npm-cache-{{ .Branch }}'
  docker: &docker_setup
    - image: 'circleci/node:8.11.2'

  install_latest_npm: &install_latest_npm
    name: Ensure NPM is up to date
    command: sudo npm install -g npm@latest
jobs:
  test:
    docker: *docker_setup
    working_directory: *workdir
    steps:
      - checkout
      - restore_cache:
          keys:
            - *cachekey
            - v1-npm-cache-
      - run: *install_latest_npm
      - run: npm ci
      - run: npm test
      - save_cache:
          paths:
            - ~/.ssh
            - ~/.npm
            - /root/.npm
          key: *cachekey
      - persist_to_workspace:
          root: *workdir
          paths:
            - .
  deploy:
    docker: *docker_setup
    working_directory: *workdir
    steps:
      - attach_workspace:
          at: *workdir
      - run: *install_latest_npm
      - run:
          name: Authenticate with registry
          command: echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > .npmrc
      - run:
          name: Publish package
          command: npm publish --access=public

workflows:
  version: 2
  test-and-deploy:
    jobs:
      - test:
          filters:
            tags:
              only: /.*/
      - deploy:
          requires:
            - test
          filters:
            tags:
              only: /^v.*/
            branches:
              ignore: /.*/