language: python

# Use container-based infrastructure
sudo: false

matrix:
  include:
    - env: TOX_ENV=py27
      python: 2.7
    - env: TOX_ENV=py34
      python: 3.4
    - env: TOX_ENV=py35
      python: 3.5
    - env: TOX_ENV=py36
      python: 3.6
    - env: TOX_ENV=py37
      python: 3.7
    - env: TOX_ENV=pypy
      python: "pypy"
    - env: TOX_ENV=pypy3
      python: "pypy3"

cache:
  directories:
    - $HOME/.cache/pip

install:
  - pip install tox
  - pip install "flake8>=3.7"

before_script:
  - "flake8 ."

script:
  tox -e $TOX_ENV

after_success:
  - |
    if [[ "${TRAVIS_TAG:-}" != "" && "$TOX_ENV" == "py36" ]]; then
      python3.6 setup.py sdist bdist_wheel;
      python3.6 -m pip install twine;
      python3.6 -m twine upload --skip-existing dist/*;
    fi