version: 2.0
jobs:
  checkout:
    working_directory: ~/project
    docker:
      - image: circleci/node:8
    steps:
      - checkout
      - restore_cache:
          keys:
          - v2-dependencies-{{ checksum "yarn.lock" }}
          - v2-dependencies-
      - run:
          name: Install Dependencies
          command: ls && yarn install
      - save_cache:
          paths:
            - node_modules
          key: v2-dependencies-{{ checksum "yarn.lock" }}
      - persist_to_workspace:
          root: .
          paths:
            - ./*
            - node_modules

  test:
    working_directory: ~/project
    docker:
      - image: circleci/node:8
    environment:
      - LOG_LEVEL: silly
      - NODE_ENV: test
      - PORT: 3000
    steps:
      - attach_workspace:
          at: ~/project
      - run:
          name: Run Tests
          command: yarn test

  publish:
    working_directory: ~/project
    docker:
      - image: circleci/node:8
    environment:
      - NODE_ENV: production
    steps:
      - attach_workspace:
          at: ~/project
      - run:
          name: Publish NPM Package
          command: ./node_modules/.bin/publish

workflows:
  version: 2
  test:
    jobs:
      - checkout
      - test:
          requires:
            - checkout
      - publish:
          requires:
            - checkout
            - test
          filters:
            branches:
              only: master