# File lib/bundler/rubygems_integration.rb, line 880
  def self.rubygems
    @rubygems ||= if RubygemsIntegration.provides?(">= 2.1.0")
      RubygemsIntegration::MoreFuture.new
    elsif RubygemsIntegration.provides?(">= 1.99.99")
      RubygemsIntegration::Future.new
    elsif RubygemsIntegration.provides?(">= 1.8.20")
      RubygemsIntegration::MoreModern.new
    elsif RubygemsIntegration.provides?(">= 1.8.5")
      RubygemsIntegration::Modern.new
    elsif RubygemsIntegration.provides?(">= 1.8.0")
      RubygemsIntegration::AlmostModern.new
    elsif RubygemsIntegration.provides?(">= 1.7.0")
      RubygemsIntegration::Transitional.new
    elsif RubygemsIntegration.provides?(">= 1.4.0")
      RubygemsIntegration::Legacy.new
    else # RubyGems 1.3.6 and 1.3.7
      RubygemsIntegration::Ancient.new
    end
  end