version: 2
jobs:
  # =======================================================================================
  # Python 3.6 testing.
  # =======================================================================================
  test-3.6:
    docker:
      - image: python:3.6
    working_directory: ~/spleeter
    steps:
      - checkout
      - restore_cache:
          key: models-{{ checksum "spleeter/model/__init__.py" }}
      - run:
          name: install ffmpeg
          command: apt-get update && apt-get install -y ffmpeg
      - run:
          name: install python dependencies
          command: pip install -r requirements.txt && pip install pytest pytest-xdist
      - run:
          name: run tests
          command: make test
      - save_cache:
          key: models-{{ checksum "spleeter/model/__init__.py" }}
          paths:
            - "pretrained_models"
  # =======================================================================================
  # Python 3.7 testing.
  # =======================================================================================
  test-3.7:
    docker:
      - image: python:3.7
    working_directory: ~/spleeter
    steps:
      - checkout
      - restore_cache:
          key: models-{{ checksum "spleeter/model/__init__.py" }}
      - run:
          name: install ffmpeg
          command: apt-get update && apt-get install -y ffmpeg
      - run:
          name: install python dependencies
          command: pip install -r requirements.txt && pip install pytest pytest-xdist
      - run:
          name: run tests
          command: make test
      - save_cache:
          key: models-{{ checksum "spleeter/model/__init__.py" }}
          paths:
            - "pretrained_models"
  # =======================================================================================
  # Source distribution packaging.
  # =======================================================================================
  sdist:
    docker:
      - image: python:3
    steps:
      - checkout
      - run:  
          name: package source distribution
          command: make build
      - save_cache:
          key: sdist-{{ .Branch }}-{{ checksum "setup.py" }}
          paths:
            - dist
  # =======================================================================================
  # PyPi deployment.
  # =======================================================================================
  pypi-deploy:
    docker:
      - image: python:3
    steps:
      - checkout
      - restore_cache:
          key: sdist-{{ .Branch }}-{{ checksum "setup.py" }}
      - run:
          name: upload to PyPi
          # TODO: Infer destination regarding of branch.
          #       - master => production PyPi
          #       - development => testing PyPi
          command: make deploy

  # =======================================================================================
  # Conda distribution.
  # =======================================================================================
  #conda-deploy:
  #  docker:
  #    - image: null # TODO: use circle ci python image.
  #  steps:
  #    - run:
  #        name: checkout feedstock
  #        command: git clone https://github.com/conda-forge/spleeter-feedstock
  #    - run:
  #        name: update version
  #        command: sed -i 's///g'
  #    - run:
  #        name: deploy
  #        command: git add recipe && git commit -m "" && git push
workflows:
  version: 2
  spleeter-workflow:
    jobs:
      - test-3.6
      - test-3.7
      - sdist:
          requires:
            - test-3.6
            - test-3.7
      - pypi-deploy:
          filters:
            branches:
              only:
                - master
          requires:
            - sdist