.travis.yml

# these are executed in order.  each must pass for the next to be run
stages:
  - smoke # this ensures a "user" install works properly
  - precache # warm up cache for default Node.js version
  - lint # lint code and docs
  - test # all tests

# defaults
language: node_js
node_js: '10'
# `nvm install` happens before the cache is restored, which means
# we must install our own npm elsewhere (`~/npm`)
before_install: |
  [[ ! -x ~/npm/node_modules/.bin/npm ]] && {
    # caching feature creates `~/npm` for us
    cd ~/npm && npm install npm@^5
    cd -
  } || true
  # avoids bugs around https://github.com/travis-ci/travis-ci/issues/5092
  export PATH=~/npm/node_modules/.bin:$PATH
# this avoids compilation in most cases (where we don't need it)
install: npm ci --ignore-scripts
cache:
  directories:
    - ~/.npm # cache npm's cache
    - ~/npm # cache latest npm

jobs:
  include:
    - script: COVERAGE=1 npm start test.node
      after_success: npm start coveralls

    - &node
      script: npm start test.node
      node_js: '9'

    - <<: *node
      node_js: '8'

    - <<: *node
      node_js: '6'

    - <<: *node
      node_js: '4'

    - script: npm start test.bundle test.browser
      install: npm ci # we need the native modules here
      addons:
        artifacts:
          paths:
            - .karma/
            - ./mocha.js
        chrome: stable
        sauce_connect: true

    - stage: lint
      script: npm start lint

    # smoke tests use default npm.
    - &smoke
      stage: smoke
      env: null
      before_install: true
      install: npm install --production
      # `--opts /dev/null` means "ignore test/mocha.opts"
      script: ./bin/mocha --opts /dev/null --reporter spec test/sanity/sanity.spec.js
      cache:
        directories:
          - ~/.npm
          - node_modules # npm install, unlike npm ci, doesn't wipe node_modules

    - <<: *smoke
      node_js: '9'

    - <<: *smoke
      node_js: '8'

    - <<: *smoke
      node_js: '6'

    - <<: *smoke
      node_js: '4'

    - stage: precache
      script: true

notifications:
  email: false
  urls:
    # for gitter mochajs/mocha
    - secure: fUrHenYJs+pTuLtgBRoYyrlyfVekxaIGmLWq7bhUUqBj/7p5eCkQFn13LlPht0/4WWZOiPBcdTN7tKnz3Ho7ATUJhAchvOWDUgL5gtTvOzeCHbPuCvHz/VLK6hMoPdbLA45M864NDLotfHvyh62WgQaVw9iPc80eb+umaDPrYiU=
    # for gitter mochajs/contributors
    - secure: rGMGYWBaZgEa9i997jJHKzjI8WxECqLi6BqsMhvstDq9EeTeXkZFVfz4r6G3Xugsk3tFwb/pDpiYo1OK36kA5arUJTCia51u4Wn+c7lHKcpef/vXztoyucvw6/jXdVm/FQz1jztYYbqdyAOWC2BV8gYvg5F8TpK05UGCe5R0bRA=
  on_success: change
  on_failure: always