version: 2

defaults: &defaults
  working_directory: ~/repo
  docker:
    - image: circleci/python:3.7.0-stretch-browsers

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

      - run:
          name: dependencies
          command: |

            # We need at least g++-8, but stretch comes with g++-6
            # Set up the Debian testing repo, and then install g++ from there...
            sudo bash -c "echo \"deb http://ftp.us.debian.org/debian testing main contrib non-free\" >> /etc/apt/sources.list"
            sudo apt-get update
            sudo apt-get install node-less cmake build-essential clang-format-6.0 flake8 uglifyjs python3-yaml chromium ccache
            sudo apt-get install -t testing g++-8
            sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-6
            sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 80 --slave /usr/bin/g++ g++ /usr/bin/g++-8
            sudo update-alternatives --set gcc /usr/bin/gcc-8
            sudo ln -s /usr/bin/clang-format-6.0 /usr/bin/clang-format

            sudo pip install virtualenv

            virtualenv pyodide-env

            source pyodide-env/bin/activate

            pip install pytest pytest-xdist pytest-instafail selenium PyYAML

            # Get recent version of Firefox and geckodriver
            wget -O firefox.tar.bz2 https://download.mozilla.org/\?product\=firefox-nightly-latest-ssl\&os\=linux64\&lang\=en-US
            tar jxf firefox.tar.bz2
            wget https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-linux64.tar.gz
            tar zxf geckodriver-v0.21.0-linux64.tar.gz -C firefox

            # Get recent version of chromedriver
            wget https://chromedriver.storage.googleapis.com/2.41/chromedriver_linux64.zip
            unzip chromedriver_linux64.zip
            mv chromedriver firefox

      - run:
          name: lint
          command: |
            source pyodide-env/bin/activate
            make lint

      - restore_cache:
          keys:
          - v1-emsdk-{{ checksum "emsdk/Makefile" }}-v6-

      - run:
          name: build
          no_output_timeout: 1200
          command: |
            source pyodide-env/bin/activate
            ccache -z
            make
            ccache -s

      - save_cache:
          paths:
            - ./emsdk/emsdk
            - ~/.ccache
          key: v1-emsdk-{{ checksum "emsdk/Makefile" }}-v6-{{ .BuildNum }}

      - persist_to_workspace:
          root: .
          paths:
            - ./build
            - ./pyodide-env
            - ./firefox

      - store_artifacts:
          path: /home/circleci/repo/build/

  test-firefox:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: .
      - run:
          name: test
          command: |
            # This Debian is so old, it doesn't know about wasm as a mime type, which then
            # causes Firefox to complain when loading it.  Let's just add the new mime type.
            sudo bash -c "echo 'application/wasm wasm' >> /etc/mime.types"

            source pyodide-env/bin/activate
            export PATH=$PWD/firefox:$PATH
            pytest test -v -k firefox

  test-chrome:
    <<: *defaults
    steps:
      - checkout
      - attach_workspace:
          at: .
      - run:
          name: test
          command: |
            # This Debian is so old, it doesn't know about wasm as a mime type, which then
            # causes Firefox to complain when loading it.  Let's just add the new mime type.
            sudo bash -c "echo 'application/wasm wasm' >> /etc/mime.types"

            source pyodide-env/bin/activate
            export PATH=$PWD/firefox:$PATH
            pytest test -v -k chrome

  deploy:
    machine:
      enabled: true

    steps:
      - checkout
      - attach_workspace:
          at: .
      - run:
          name: Deploy to Github Pages
          command: |
            .circleci/deploy.sh

workflows:
  version: 2
  build-and-deploy:
    jobs:
      - build
      - test-chrome:
          requires:
            - build
      - test-firefox:
          requires:
            - build
      - deploy:
          requires:
            - test-chrome
            - test-firefox
          filters:
            branches:
              only: master