cache: bundler
language: ruby
sudo: false

rvm:
  - 2.1
  - 2.2
  - 2.3
  - 2.4
  - 2.5

before_install:
  - gem update --system # Need for Ruby 2.5.0. https://github.com/travis-ci/travis-ci/issues/8978
  - gem install bundler -v '~> 1.10'

gemfile:
  - gemfiles/rails_4_2.gemfile
  - gemfiles/rails_5_0.gemfile
  - gemfiles/rails_5_1.gemfile
  - gemfiles/rails_5_2.gemfile
  - gemfiles/rails_master.gemfile

matrix:
  exclude:
    - gemfile: gemfiles/rails_5_0.gemfile
      rvm: 2.1
    - gemfile: gemfiles/rails_5_1.gemfile
      rvm: 2.1
    - gemfile: gemfiles/rails_5_2.gemfile
      rvm: 2.1
    - gemfile: gemfiles/rails_master.gemfile
      rvm: 2.1
    - gemfile: gemfiles/rails_master.gemfile
      rvm: 2.2
    - gemfile: gemfiles/rails_master.gemfile
      rvm: 2.3
  allow_failures:
    - gemfile: gemfiles/rails_master.gemfile