* lib/rubygems: Import RubyGems 2.1.0 Release Candidate

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/source/specific_file.rb

@@ -25,4 +25,32 @@ class Gem::Source::SpecificFile < Gem::Source
     raise Gem::Exception, "Unable to download '#{spec.full_name}'"
   end
 
+  def pretty_print q # :nodoc:
+    q.group 2, '[Local:', ']' do
+      q.breakable
+      q.text @path
+    end
+  end
+
+  ##
+  # Orders this source against +other+.
+  #
+  # If +other+ is a SpecificFile from a different gem name +nil+ is returned.
+  #
+  # If +other+ is a SpecificFile from the same gem name the versions are
+  # compared using Gem::Version#<=>
+  #
+  # Otherwise Gem::Source#<=> is used.
+
+  def <=> other
+    case other
+    when Gem::Source::SpecificFile then
+      return nil if @spec.name != other.spec.name
+
+      @spec.version <=> other.spec.version
+    else
+      super
+    end
+  end
+
 end