# File lib/bundler/runtime.rb, line 57
    def require(*groups)
      groups.map!(&:to_sym)
      groups = [:default] if groups.empty?

      @definition.dependencies.each do |dep|
        # Skip the dependency if it is not in any of the requested
        # groups
        next unless (dep.groups & groups).any? && dep.current_platform?

        required_file = nil

        begin
          # Loop through all the specified autorequires for the
          # dependency. If there are none, use the dependency's name
          # as the autorequire.
          Array(dep.autorequire || dep.name).each do |file|
            # Allow `require: true` as an alias for `require: <name>`
            file = dep.name if file == true
            required_file = file
            begin
              Kernel.require file
            rescue => e
              raise e if e.is_a?(LoadError) # we handle this a little later
              raise Bundler::GemRequireError.new e,
                "There was an error while trying to load the gem '#{file}'."
            end
          end
        rescue LoadError => e
          REQUIRE_ERRORS.find {|r| r =~ e.message }
          raise if dep.autorequire || $1 != required_file

          if dep.autorequire.nil? && dep.name.include?("-")
            begin
              namespaced_file = dep.name.tr("-", "/")
              Kernel.require namespaced_file
            rescue LoadError => e
              REQUIRE_ERRORS.find {|r| r =~ e.message }
              raise if $1 != namespaced_file
            end
          end
        end
      end
    end