.travis.yml

# refer to https://docs.travis-ci.com/user/languages/minimal-and-generic/#generic
# for the rationale behind choosing the generic lang
language: generic
dist: xenial # ubuntu 16.04
cache: bundler
env:
  global:
    - PATH=/opt/python/3.7.1/bin:$PATH
before_install: # get a reasonably new version of python3 and pip
  - sudo apt-get install python3-pip
  - sudo -H pip3 install --upgrade pip
  - sudo apt-get install python3-setuptools
install:
  - pip3 install --user -r ./book/website/requirements.txt # install things for the book
  - pip3 install --user -U attrs pytest # the installed versions in Travis are too old!
script:
  # Below here, "scripts" directory refers to the one in book/website:
  - cd ./book/website
  - make install # install jekyll etc. for building website
  - bash ./scripts/html-proof.sh # check dead links etc.