# These environment variables must be set in CircleCI UI
#
# NPM_TOKEN - A valid NPM token for releases
#
# NOTE:
# - to validate changes to this file locally using the circleci CLI tool:
#
#     circleci config process .circleci/config.yml
#
# - to try run jobs locally:
#
#     circleci config process .circleci/config.yml > tmp/processed.yml
#     circleci local execute -c tmp/processed.yml --job build-nodejs-current
#
version: 2.1

references:
  nodejs_current: &nodejs_current "10"
  repo_path: &repo_path ~/webextension-polyfill
  defaults: &defaults
    working_directory: *repo_path
    parameters:
      nodejs_current:
        type: string
        default: *nodejs_current

commands:
  run_npm_install:
    description: install npm dependencies
    steps:
      - run: npm i

  run_npm_build:
    description: build project in << parameters.node_env >> mode
    parameters:
      node_env:
        type: enum
        default: production
        enum: ["production", "test"]
    steps:
      - run:
          command: npm run build --if-present
          environment:
            NODE_ENV: << parameters.node_env >>

  run_test_minified:
    description: rerun unit tests on minified file
    steps:
      - run:
          command: npm run test-minified

  run_test_bundlers:
    description: rerun unit tests on webpack and browserify bundled files
    steps:
      - configure_global_npm
      - run: npm install -g browserify webpack webpack-cli
      - run: |
          export PATH=$PATH:../.npm-global/bin
          node ./scripts/run-module-bundlers-smoketests.js

  run_xephyr:
    description: run Xephyr on DISPLAY=:10
    steps:
      - run: |
          sudo apt install xserver-xephyr
          Xephyr -ac -br -noreset -screen 1280x1024x24 :10 &
          sleep 2

  run_functional_tests:
    description: run integration tests on Firefox and Chrome browsers
    steps:
      # circleci browsers image variant does include and run Xvfb
      # unfortunately Chrome seems to intermittently fail to connect
      # to it successfully:
      #
      #     ERROR:browser_main_loop.cc(1434)] Unable to open X display
      #
      # On the contrary it seems to don't happen with Xephyr.
      - run_xephyr
      - run:
          command: node ./scripts/run-browsers-smoketests.js
          environment:
            DISPLAY: :10.0
            CHROMEDRIVER_VERBOSE_LOGFILE: /tmp/chromedriver.log
      - store_artifacts:
          # chromedriver verbose logs stored in the artifacts to make
          # it easier investigate CI jobs chromedriver issues.
          path: /tmp/chromedriver.log
  run_tests:
    description: run tests
    steps:
      - run:
          name: run linting check and unit tests with coverage
          command: npm run test-coverage
      - store_artifacts:
          path: coverage
      - run:
          name: publish coverage data
          command: npm run publish-coverage
      - run_test_minified
      - run_test_bundlers
      - run_functional_tests

  # This is required to avoid a `EACCES` when running `npm install -g` (which is
  # executed in the test suite).
  configure_global_npm:
    description: create custom directory for global npm installs
    steps:
      - run: mkdir ../.npm-global
      - run: npm config set prefix '../.npm-global'

  attach_project_repo:
    description: attach repo from workspace
    steps:
      - attach_workspace:
          at: *repo_path

  persist_project_repo:
    description: persist repo in workspace
    steps:
      - persist_to_workspace:
          root: *repo_path
          paths: .

jobs:
  build:
    <<: *defaults
    docker:
      # Image variant including Firefox, Chrome and Xvfb
      - image: circleci/node:<< parameters.nodejs_current >>-browsers
    steps:
      - attach_project_repo
      - checkout
      - run_npm_install
      - run_npm_build:
          node_env: test
      - run_tests
      - persist_project_repo

  release-tag:
    <<: *defaults
    docker:
      - image: circleci/node:<< parameters.nodejs_current >>
    steps:
      - attach_project_repo
      - run_npm_build:
          node_env: production
      - run:
          name: npm registry auth
          command: echo '//registry.npmjs.org/:_authToken=${NPM_TOKEN}' > .npmrc
      - run:
          name: npm registry publish
          command: npm publish

workflows:
  default-workflow:
    jobs:
      - build:
          name: build-nodejs-current
          filters:
            tags:
              only: /.*/
      - release-tag:
          requires:
            - build-nodejs-current
          filters:
            tags:
              only: /.*/
            branches:
              ignore: /.*/