language: ruby
rvm:
  - 2.4.1

before_script:
  - chmod +x ./script/cibuild # or do this locally and commit

# Assume bundler is being used, therefore
# the `install` step will run `bundle install` by default.
script: ./script/cibuild

# branch whitelist, only for GitHub Pages
branches:
  only:
    - master     # test the master branch

env:
  global:
    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer

addons:
  apt:
    packages:
      - libcurl4-openssl-dev

sudo: false # route your build to the container-based infrastructure for a faster build

cache: bundler # caching bundler gem packages will speed up build

deploy:
  provider: pages
  skip_cleanup: true
  github_token: $GITHUB_TOKEN  # Set in the settings page of your repository, as a secure variable
  keep_history: true
  on:
    branch: master
  local_dir: _site