This is our circleci config.yml file

config.yml

# This is Journalistic's A&O CI workflow. Whenever we push code to github
# that's not the master branch, it needs to download the branch, push it up to
# Pantheon, create a CI environment, run the visual regression testing, and
# then run the cypress testing.

defaults: &defaults
  docker:
    - image: quay.io/pantheon-public/build-tools-ci:4.x
  working_directory: ~/app
  environment:
    TZ: "/usr/share/zoneinfo/America/New_York"
    ADMIN_USERNAME: admin
    TERM: dumb
    NOTIFY: 'scripts/github/add-commit-comment {project} {sha} "Created multidev environment [{site}#{env}]({dashboard-url})." {site-url}'

version: 2

jobs:
  build:
    <<: *defaults
    steps:
      - checkout

      - run:
          # Set TERMINUS_ENV and related environment variables.
          # https://github.com/pantheon-systems/docker-build-tools-ci/blob/1.x/scripts/set-environment
          name: dependencies
          command: /build-tools-ci/scripts/set-environment

      - run:
          name: Global vars
          # Override of https://github.com/stevector/docker-build-tools-ci/blob/master/dockerfiles/pantheon-ci-testing/scripts/set-up-global-vars.sh
          command: ./.circleci/set-up-global-vars.sh

      - run:
          name: login, delete other ci environments
          command: ./.circleci/scripts/pantheon/01-prepare

      - add_ssh_keys:
          fingerprints:
            - "[ssh key fingerprint]"

      - run:
          name: prepare database for site-under test
          command: ./.circleci/scripts/pantheon/02-init-site

      - run:
          name: Set TERMINUS_ENV for Backstop
          command: |
              mkdir globals
              echo $TERMINUS_ENV > globals/TERMINUS_ENV

      - persist_to_workspace:
          root: .
          paths:
              - globals

  backstop:
    docker:
      - image: quay.io/stevector/ci-backstop:latest
    working_directory: ~/app
    steps:
        - checkout

        - attach_workspace:
            at: /tmp

        - run:
            name: Global vars
            # Override of https://github.com/stevector/docker-build-tools-ci/blob/master/dockerfiles/pantheon-ci-testing/scripts/set-up-global-vars.sh
            command: ./.circleci/set-up-global-vars.sh

        - run:
            name: run-backstop
            command: cd backstop && ./run-backstop.sh

        - store_artifacts:
            path: /tmp/artifacts
            destination: artifact

  cypress:
    docker:
      - image: cypress/browsers:chrome67
    working_directory: ~/app
    steps:
        - checkout

        - attach_workspace:
            at: /tmp

        - run:
            name: Global vars
            # Override of https://github.com/stevector/docker-build-tools-ci/blob/master/dockerfiles/pantheon-ci-testing/scripts/set-up-global-vars.sh
            command: ./.circleci/set-up-global-vars.sh

        # find compatible cache from previous build,
        # it should have same dependencies installed from package.json checksum
        - restore_cache:
            keys:
              - cache-{{ .Branch }}-{{ checksum "package.json" }}

        - run:
            name: Install dependencies
            command: npm ci

        # run verify and then save cache.
        # this ensures that the Cypress verified status is cached too
        - run: npm run cy:verify

        # save new cache folder if needed
        - save_cache:
            key: cache-{{ .Branch }}-{{ checksum "package.json" }}
            paths:
              - ~/.npm
              - ~/.cache

        - run:
            name: Run tests
            command: npm run e2e:record

        # - run: npm run types
        # - run: npm run stop-only
        # all other test jobs will run AFTER this build job finishes
        # to avoid reinstalling dependencies, we persist the source folder "app"
        # and the Cypress binary to workspace, which is the fastest way
        # for Circle jobs to pass files
        - persist_to_workspace:
            root: ~/
            paths:
              - app
              - .cache/Cypress

workflows:
  version: 2
  build_and_test:
    jobs:
      - build
      - backstop:
          requires:
            - build
      - cypress:
          requires:
            - build