.travis.yml

---

language: python

# Paralellize by telling Travis what our matrix looks like - we reduce the actual command
# to just calling `tox` with a single environment, specified by `TOX_ENV`, which is set
# multiple times. Travis will take care of creating necessary threads.
matrix:
    include:
      - python: 2.7
        env: TOX_ENV=py27-static-analysis

      - python: 2.7
        env: TOX_ENV=py27-unit-tests

      - python: 3.6
        env: TOX_ENV=py36-static-analysis

      - python: 3.6
        env: TOX_ENV=py36-unit-tests

      - python: 3.7
        env: TOX_ENV=py37-static-analysis

      - python: 3.7
        env: TOX_ENV=py37-unit-tests

      - python: 3.8
        env: TOX_ENV=py38-static-analysis

      - python: 3.8
        env: TOX_ENV=py38-unit-tests

      # For type-check, we need Python 3 to power `mypy`. It's going to check types for both
      # Python 3 *and* 2, therefore it's perfectly fine to run it just once.
      - python: 3.6
        env: TOX_ENV=type-check

install: pip install tox-travis

script:
  - tox -e $TOX_ENV