---
.defaults: &defaults
  before_script:
    - apk add --update ragel=6.9
    - gem install bundler --no-ri --no-rdoc
    - ruby --version
    - gem --version
    - bundle --version
    - bundle install -j $(nproc) --path vendor --retry=3
  script:
    - bundle exec rake
  cache:
    paths:
      - vendor/ruby

Ruby 2.2:
  image: "ruby:2.2-alpine"
  <<: *defaults

Ruby 2.3:
  image: "ruby:2.3-alpine"
  <<: *defaults

Ruby 2.4:
  image: "ruby:2.4-alpine"
  <<: *defaults

JRuby 9.1:
  image: "jruby:9.1-alpine"
  <<: *defaults