version: 2
# --- Constants --- #

globals:
  images:
    node: &node cimg/node:lts
    postgres: &postgres circleci/postgres:9.6.5
  caches:
    dependencies: &dependencies dependencies-{{ checksum "package.json" }}

# --- Commands --- #

commands:
  init:
    description: Setup the environment
    steps:
      - checkout
      - restore_cache:
          keys:
            - *dependencies

# --- Jobs definitions --- #

jobs:
  build: &shared-config
    docker:
      - image: *node
    working_directory: ~/app
    steps:
      - checkout
      - restore_cache:
          keys:
            - *dependencies
            # fallback to using the latest cache if no exact match is found
            - dependencies-
      - run: yarn install
      - save_cache:
          paths:
            - node_modules
          key: *dependencies
  test:
    <<: *shared-config
    steps:
      - init
      - run: yarn test

  test-e2e:
    <<: *shared-config
    docker:
      - image: *node
      - image: *postgres
        environment:
          POSTGRES_DB: postgres
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
    steps:
      - init
      - run:
          command: yarn test:e2e
          environment:
            DATABASE_URL: postgres://postgres:postgres@localhost:5432/postgres

  lint:
    <<: *shared-config
    steps:
      - init
      - run:
          name: Check files format
          command: yarn format:check

      - run:
          name: Lint files
          command: yarn lint

# --- Workflow definition --- #

workflows:
  version: 2
  build-test-and-lint:
    jobs:
      - build
      - test:
          requires:
            - build
      - test-e2e:
          requires:
            - build
      - lint:
          requires:
            - build