* lib/rubygems: Import RubyGems 2.1

* test/rubygems:  Ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41873 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/dependency_resolver/dependency_request.rb

@@ -0,0 +1,51 @@
+##
+# Used Internally. Wraps a Dependency object to also track which spec
+# contained the Dependency.
+
+class Gem::DependencyResolver::DependencyRequest
+
+  attr_reader :dependency
+
+  attr_reader :requester
+
+  def initialize(dep, act)
+    @dependency = dep
+    @requester = act
+  end
+
+  def ==(other)
+    case other
+    when Gem::Dependency
+      @dependency == other
+    when Gem::DependencyResolver::DependencyRequest
+      @dependency == other.dependency && @requester == other.requester
+    else
+      false
+    end
+  end
+
+  def matches_spec?(spec)
+    @dependency.matches_spec? spec
+  end
+
+  def name
+    @dependency.name
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[Dependency request ', ']' do
+      q.breakable
+      q.text @dependency.to_s
+
+      q.breakable
+      q.text ' requested by '
+      q.pp @requester
+    end
+  end
+
+  def to_s # :nodoc:
+    @dependency.to_s
+  end
+
+end
+