language: ruby
sudo: false
cache: bundler
rvm:
  - 2.1.9
  - 2.2.6
  - 2.3.3
  - 2.4.1
gemfile:
  - gemfiles/rails_4.gemfile
  - gemfiles/rails_41.gemfile
  - gemfiles/rails_42.gemfile
  - gemfiles/rails_5.gemfile
  - gemfiles/rails_51.gemfile
env:
  - TEST_SUITE=rake

before_install:
  - gem update bundler

script:
  - bundle exec $TEST_SUITE

matrix:
  exclude:
    - rvm: 2.1.9
      gemfile: gemfiles/rails_5.gemfile
    - rvm: 2.1.9
      gemfile: gemfiles/rails_51.gemfile
  include:
    - rvm: 2.4.1
      gemfile: gemfiles/rails_5.gemfile
      env: TEST_SUITE="rubocop lib/ spec/"

notifications:
  email: false