appraise 'rails_3_2' do
  gem 'rails',    '~> 3.2.22.5'
  gem 'rack',     '~> 1.0',   :platforms => [:ruby_20, :ruby_21]
  gem 'nokogiri', '~> 1.6.0', :platforms => [:ruby_20]
  gem 'mysql2',   '~> 0.3.10'
end if RUBY_VERSION.to_f < 2.2

appraise 'rails_4_0' do
  gem 'rails',    '~> 4.0.13'
  gem 'rack',     '~> 1.0', :platforms => [:ruby_20, :ruby_21]
  gem 'nokogiri', '~> 1.6.0', :platforms => [:ruby_20]
  gem 'mysql2',   '~> 0.3.10'
end if RUBY_VERSION.to_f < 2.4

appraise 'rails_4_1' do
  gem 'rails',    '~> 4.1.16'
  gem 'rack',     '~> 1.0', :platforms => [:ruby_20, :ruby_21]
  gem 'nokogiri', '~> 1.6.0', :platforms => [:ruby_20]
  gem 'mysql2',   '~> 0.3.13'
end if RUBY_VERSION.to_f < 2.4

appraise 'rails_4_2' do
  gem 'rails',    '~> 4.2.7'
  gem 'rack',     '~> 1.0',   :platforms => [:ruby_20, :ruby_21]
  gem 'nokogiri', '~> 1.6.0', :platforms => [:ruby_20]
end if RUBY_VERSION.to_f < 2.4

appraise 'rails_5_0' do
  gem 'rails', '~> 5.0.1'
end if RUBY_VERSION.to_f >= 2.2

appraise 'rails_5_1' do
  gem 'rails', '~> 5.1.0'
end if RUBY_VERSION.to_f >= 2.2