language: python
 
 matrix:
   include:
     - os: linux
       python: 3.5
     - os: linux
       python: 3.6
     - os: linux
       python: 3.7
       dist: xenial
       sudo: true
     - os: osx
       language: generic
       env: PYTHON=3.5.6
     - os: osx
       language: generic
       env: PYTHON=3.6.6
     - os: osx
       language: generic
       env: PYTHON=3.7.0
 
 # Taken from https://pythonhosted.org/CodeChat/.travis.yml.html#before-install
 before_install: |
   if [ "$TRAVIS_OS_NAME" == "osx" ]; then
     brew update
     # Per the `pyenv homebrew recommendations <https://github.com/yyuu/pyenv/wiki#suggested-build-environment>`_.
     brew install openssl readline
     # See https://docs.travis-ci.com/user/osx-ci-environment/#A-note-on-upgrading-packages.
     # I didn't do this above because it works and I'm lazy.
     brew outdated pyenv || brew upgrade pyenv
     # virtualenv doesn't work without pyenv knowledge. venv in Python 3.3
     # doesn't provide Pip by default. So, use `pyenv-virtualenv <https://github.com/yyuu/pyenv-virtualenv/blob/master/README.md>`_.
     brew install pyenv-virtualenv
     pyenv install $PYTHON
     # I would expect something like ``pyenv init; pyenv local $PYTHON`` or
     # ``pyenv shell $PYTHON`` would work, but ``pyenv init`` doesn't seem to
     # modify the Bash environment. ??? So, I hand-set the variables instead.
     export PYENV_VERSION=$PYTHON
     export PATH="/Users/travis/.pyenv/shims:${PATH}"
     pyenv-virtualenv venv
     source venv/bin/activate
     # A manual check that the correct version of Python is running.
     python --version
   fi
 
 install:
   - cd ..
   - git init my_package
   - cd my_package
   - python ../miniver/ci/create_package.py
   - git add .
   - git commit -m 'Initialization of package'
   - git tag -a 0.0.0 -m 'First version for miniver'
   - pip install -e .
 script:
   - python -c "import my_package; assert my_package.__version__ == '0.0.0'"
   - cd ../my_package
   - echo "# Extra comment" >> setup.py
   - python -c "import my_package; assert my_package.__version__.endswith('dirty')"
   - python -c "import my_package; assert my_package.__version__.startswith('0.0.0')"
   - git commit -a -m 'new comment'
   - python -c "import my_package; assert my_package.__version__.startswith('0.0.0.dev1')"
   - git tag -a 0.0.1 -m '0.0.1'
   - python -c "import my_package; assert my_package.__version__ == '0.0.1'"