# See https://zulip.readthedocs.io/en/latest/testing/continuous-integration.html for
#   high-level documentation on our CircleCI setup.
# See CircleCI upstream's docs on this config format:
#   https://circleci.com/docs/2.0/language-python/
#
version: 2.0
aliases:
  - &create_cache_directories
    run:
      name: create cache directories
      command: |
          dirs=(/srv/zulip-{npm,venv}-cache)
          sudo mkdir -p "${dirs[@]}"
          sudo chown -R circleci "${dirs[@]}"

  - &restore_cache_package_json
    restore_cache:
      keys:
      - v1-npm-base.{{ .Environment.CIRCLE_JOB }}-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}

  - &restore_cache_requirements
    restore_cache:
      keys:
      - v1-venv-base.{{ .Environment.CIRCLE_JOB }}-{{ checksum "requirements/thumbor.txt" }}-{{ checksum "requirements/dev.txt" }}

  - &install_dependencies
    run:
      name: install dependencies
      command: |
        sudo apt-get update
        # Install moreutils so we can use `ts` and `mispipe` in the following.
        sudo apt-get install -y moreutils

        # CircleCI sets the following in Git config at clone time:
        #   url.ssh://git@github.com.insteadOf https://github.com
        # This breaks the Git clones in the NVM `install.sh` we run
        # in `install-node`.
        # TODO: figure out why that breaks, and whether we want it.
        #   (Is it an optimization?)
        rm -f /home/circleci/.gitconfig

        # This is the main setup job for the test suite
        mispipe "tools/ci/setup-backend" ts

        # Cleaning caches is mostly unnecessary in Circle, because
        # most builds don't get to write to the cache.
        # mispipe "scripts/lib/clean-unused-caches --verbose --threshold 0" ts

  - &save_cache_package_json
    save_cache:
      paths:
        - /srv/zulip-npm-cache
      key: v1-npm-base.{{ .Environment.CIRCLE_JOB }}-{{ checksum "package.json" }}-{{ checksum "yarn.lock" }}

  - &save_cache_requirements
    save_cache:
      paths:
        - /srv/zulip-venv-cache
      key: v1-venv-base.{{ .Environment.CIRCLE_JOB }}-{{ checksum "requirements/thumbor.txt" }}-{{ checksum "requirements/dev.txt" }}
    # TODO: in Travis we also cache ~/zulip-emoji-cache, ~/node, ~/misc

  - &run_backend_tests
    run:
      name: run backend tests
      command: |
        . /srv/zulip-py3-venv/bin/activate
        mispipe ./tools/ci/backend ts

  - &run_frontend_tests
    run:
      name: run frontend tests
      command: |
        . /srv/zulip-py3-venv/bin/activate
        mispipe ./tools/ci/frontend ts

  - &upload_coverage_report
    run:
     name: upload coverage report
     command: |
       . /srv/zulip-py3-venv/bin/activate
       pip install codecov && codecov \
         || echo "Error in uploading coverage reports to codecov.io."

jobs:
  "trusty-backend-frontend-python3.4":
    docker:
      # This is built from tools/circleci/images/trusty/Dockerfile .
      # Trusty ships with Python 3.4.
      - image: gregprice/circleci:trusty-python-5.test

    working_directory: ~/zulip

    steps:
      - checkout

      - *create_cache_directories
      - *restore_cache_package_json
      - *restore_cache_requirements
      - *install_dependencies
      - *save_cache_package_json
      - *save_cache_requirements
      - *run_backend_tests
      - *run_frontend_tests
      - *upload_coverage_report

      # - store_artifacts:  # TODO
      #     path: var/casper/
      #     # also /tmp/zulip-test-event-log/
      #     destination: test-reports

  "xenial-backend-python3.5":
    docker:
      # This is built from tools/circleci/images/xenial/Dockerfile .
      # Xenial ships with Python 3.5.
      - image: gregprice/circleci:xenial-python-4.test

    working_directory: ~/zulip

    steps:
      - checkout
      - *create_cache_directories
      - *restore_cache_package_json
      - *restore_cache_requirements
      - *install_dependencies
      - *save_cache_package_json
      - *save_cache_requirements
      - *run_backend_tests
      - *upload_coverage_report

  "bionic-backend-python3.6":
    docker:
      # This is built from tools/circleci/images/bionic/Dockerfile .
      # Bionic ships with Python 3.6.
      - image: gregprice/circleci:bionic-python-1.test

    working_directory: ~/zulip

    steps:
      - checkout

      - *create_cache_directories

      - run:
          name: do Bionic hack
          command: |
              # Temporary hack till `sudo service redis-server start` gets fixes in Bionic. See
              # https://chat.zulip.org/#narrow/stream/3-backend/topic/Ubuntu.20bionic.20CircleCI
              sudo sed -i '/^bind/s/bind.*/bind 0.0.0.0/' /etc/redis/redis.conf

      - *restore_cache_package_json
      - *restore_cache_requirements
      - *install_dependencies
      - *save_cache_package_json
      - *save_cache_requirements
      - *run_backend_tests
      - *upload_coverage_report

workflows:
  version: 2
  build:
    jobs:
      - "trusty-backend-frontend-python3.4"
      - "xenial-backend-python3.5"
      - "bionic-backend-python3.6"