.travis.yml

language: python
jobs:
  include:
    - name: "Python 3.8.0 on Bionic Beaver Linux"
      dist: bionic
      python: 3.8 # this works for Linux but is ignored on macOS or Windows
    - 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
    - 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
        - python -m pip install --upgrade pip
      env: PATH=/c/Python38:/c/Python38/Scripts:$PATH
branches:
  only:
    - master

install:
  - pip3 install --upgrade pip # all three OSes agree about 'pip3'
  - pip3 install -r requirements.txt
  - pip3 install pyinstaller

script:
  - pyinstaller build.spec
  - if [[ ${TRAVIS_OS_NAME} == "windows" ]]; then
      python ./tools/ci_notify.py;
    else
      python3 ./tools/ci_notify.py;
    fi