language: ruby
cache: bundler

rvm:
  - 2.3
  - 2.4
  - 2.5
  - 2.6

before_install:
  - gem install bundler

gemfile:
  # ignore 4.2 for now as the cost to run these tests is too high
  # - gemfiles/rails_4.2.gemfile
  - gemfiles/rails_5.0.gemfile
  - gemfiles/rails_5.1.gemfile
  - gemfiles/rails_5.2.gemfile
  - gemfiles/mongoid_4.0.gemfile
  - gemfiles/mongoid_5.0.gemfile
  - gemfiles/mongoid_6.0.gemfile

matrix:
  include:
    - rvm: 2.6
      env: RUBYOPT="--enable-frozen-string-literal"
  # allow_failures:
  #   - rvm: ruby-head

addons:
  code_climate:
    repo_token: b84a33c35c698270ad54261655bc25161a0853386825a2d54fb1c7a11c2b2785