```ruby
module Capybara
  module Features
    def self.included(base)
      base.instance_eval do
        alias :background :before
        alias :scenario :it
        alias :xscenario :xit
        alias :given :let
        alias :given! :let!
        alias :feature :describe
      end
    end
  end
end


def self.feature(*args, &block)
  options = if args.last.is_a?(Hash) then args.pop else {} end
  options[:capybara_feature] = true
  options[:type] = :feature
  options[:caller] ||= caller
  args.push(options)

  #call describe on RSpec in case user has expose_dsl_globally set to false
  RSpec.describe(*args, &block)
end

RSpec.configuration.include Capybara::Features, :capybara_feature => true
```

Support RSpec expose_dsl_globally configuration option
user
```ruby
if RSpec::Version::STRING.to_f >= 3.0
  RSpec.shared_context "Capybara Features", :capybara_feature => true do
    instance_eval do
      alias background before
      alias given let
      alias given! let!
    end
  end

  RSpec.configure do |config|
    config.alias_example_group_to :feature, :capybara_feature => true, :type => :feature
    config.alias_example_to :scenario
    config.alias_example_to :xscenario, :skip => "Temporarily disabled with xscenario"
    # config.alias_example_to :fscenario, :focus => true
  end
else
  module Capybara
    module Features
      def self.included(base)
        base.instance_eval do
          alias :background :before
          alias :scenario :it
          alias :xscenario :xit
          alias :given :let
          alias :given! :let!
          alias :feature :describe
        end
      end
    end
  end


  def self.feature(*args, &block)
    options = if args.last.is_a?(Hash) then args.pop else {} end
    options[:capybara_feature] = true
    options[:type] = :feature
    options[:caller] ||= caller
    args.push(options)

    #call describe on RSpec in case user has expose_dsl_globally set to false
    RSpec.describe(*args, &block)
  end

  RSpec.configuration.include Capybara::Features, :capybara_feature => true
end```
assistant