language: ruby
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.2
  - 2.3.0
  - 2.4.1
  - 2.5.0
gemfile:
  - gemfiles/rails_41.gemfile
  - gemfiles/rails_42.gemfile
  - gemfiles/rails_50.gemfile
  - gemfiles/rails_51.gemfile
  - gemfiles/rails_52.gemfile
  - gemfiles/rails_edge.gemfile
matrix:
  exclude:
    # Rails 5.0+ requires CRuby 2.2.2+
    - rvm: 1.9.3
      gemfile: gemfiles/rails_50.gemfile
    - rvm: 1.9.3
      gemfile: gemfiles/rails_51.gemfile
    - rvm: 1.9.3
      gemfile: gemfiles/rails_52.gemfile
    - rvm: 1.9.3
      gemfile: gemfiles/rails_edge.gemfile
    - rvm: 2.0.0
      gemfile: gemfiles/rails_50.gemfile
    - rvm: 2.0.0
      gemfile: gemfiles/rails_51.gemfile
    - rvm: 2.0.0
      gemfile: gemfiles/rails_52.gemfile
    - rvm: 2.0.0
      gemfile: gemfiles/rails_edge.gemfile
    - rvm: 2.1.0
      gemfile: gemfiles/rails_50.gemfile
    - rvm: 2.1.0
      gemfile: gemfiles/rails_51.gemfile
    - rvm: 2.1.0
      gemfile: gemfiles/rails_52.gemfile
    - rvm: 2.1.0
      gemfile: gemfiles/rails_edge.gemfile
    # Rails 6.0+ requires CRuby 2.4.1+
    - rvm: 2.2.2
      gemfile: gemfiles/rails_edge.gemfile
    - rvm: 2.3.0
      gemfile: gemfiles/rails_edge.gemfile
    # CRuby 2.4+ requires Rails 4.2.8+
    - rvm: 2.4.1
      gemfile: gemfiles/rails_41.gemfile
    - rvm: 2.5.0
      gemfile: gemfiles/rails_41.gemfile