appraise "activesupport-3.0.x" do
  gem 'activesupport', '~> 3.0.9'
end

appraise "activesupport-3.1" do
  gem 'activesupport', '~> 3.1.0'
end

appraise "activesupport-head" do
  gem 'activesupport', :path => '../../rails/activesupport/'
end