.travis.yml

 language: python     # this works for Linux but is an error on macOS or Windows

git:
  depth: 1

branches:
  only:
  - master

jobs:
  include:
    - name: "Python 3.8.0 on Xenial Linux"
      python: 3.8           # this works for Linux but is ignored on macOS or Windows
      before_install:
        - sudo apt-get -y install swig
        - pip install -U pip setuptools wheel tox
        
    - name: "Python 3.7.4 on macOS"
      os: osx
      osx_image: xcode11.2  # Python 3.7.4 running on macOS 10.14.4
      language: shell       # 'language: python' is an error on Travis CI macOS
      before_install:
        - brew install swig
        - pip install -U pip setuptools wheel tox
        
    - name: "Python 3.8.0 on Windows"
      os: windows           # Windows 10.0.17134 N/A Build 17134
      language: shell       # 'language: python' is an error on Travis CI Windows
      before_install:
        - choco install python --version 3.8.0
        - choco install -y swig
        - choco install -y conan
        - python -m pip install --upgrade pip
        
      env: 
        - PATH=/c/Python38:/c/Python38/Scripts:$PATH
        - CMAKE_GENERATOR="Visual Studio 15 2017 Win64"

script:
  - python3 src/bindings/python/setup.py build || python src/bindings/python/setup.py build