language: python

python:
- 3.5
- 3.6
- 3.6-dev
- 3.7
- 3.7-dev

# required for python >= 3.7
dist: xenial

env:
# https://pypi.org/project/pandas/#history
- PANDAS_VERSION=
- PANDAS_VERSION=0.24.*
- PANDAS_VERSION=0.23.*
- PANDAS_VERSION=0.22.*
- PANDAS_VERSION=0.21.*

# https://travis-ci.org/fphammerle/freesurfer-volume-reader/builds/525556257
matrix:
  exclude:
  - python: 3.7
    env: PANDAS_VERSION=0.21.*
  - python: 3.7
    env: PANDAS_VERSION=0.22.*
  - python: 3.7-dev
    env: PANDAS_VERSION=0.21.*
  - python: 3.7-dev
    env: PANDAS_VERSION=0.22.*

install:
- pip install pipenv
- pipenv sync --dev
- if [ ! -z "$PANDAS_VERSION" ]; then
    pipenv install --selective-upgrade "pandas==$PANDAS_VERSION";
  fi
- pipenv graph

script:
- pipenv run pylint freesurfer_volume_reader tests/*
- pipenv run pytest