* 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/activation_request.rb

@@ -0,0 +1,109 @@
+##
+# Specifies a Specification object that should be activated.
+# Also contains a dependency that was used to introduce this
+# activation.
+
+class Gem::DependencyResolver::ActivationRequest
+
+  attr_reader :request
+
+  attr_reader :spec
+
+  def initialize spec, req, others_possible = true
+    @spec = spec
+    @request = req
+    @others_possible = others_possible
+  end
+
+  def == other
+    case other
+    when Gem::Specification
+      @spec == other
+    when Gem::DependencyResolver::ActivationRequest
+      @spec == other.spec && @request == other.request
+    else
+      false
+    end
+  end
+
+  def download path
+    if @spec.respond_to? :source
+      source = @spec.source
+    else
+      source = Gem.sources.first
+    end
+
+    Gem.ensure_gem_subdirectories path
+
+    source.download full_spec, path
+  end
+
+  def full_name
+    @spec.full_name
+  end
+
+  def full_spec
+    Gem::Specification === @spec ? @spec : @spec.spec
+  end
+
+  def inspect # :nodoc:
+    others_possible = nil
+    others_possible = ' (others possible)' if @others_possible
+
+    '#<%s for %p from %s%s>' % [
+      self.class, @spec, @request, others_possible
+    ]
+  end
+
+  ##
+  # Indicates if the requested gem has already been installed.
+
+  def installed?
+    this_spec = full_spec
+
+    Gem::Specification.any? do |s|
+      s == this_spec
+    end
+  end
+
+  def name
+    @spec.name
+  end
+
+  ##
+  # Indicate if this activation is one of a set of possible
+  # requests for the same Dependency request.
+
+  def others_possible?
+    @others_possible
+  end
+
+  ##
+  # Return the ActivationRequest that contained the dependency
+  # that we were activated for.
+
+  def parent
+    @request.requester
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[Activation request', ']' do
+      q.breakable
+      q.pp @spec
+
+      q.breakable
+      q.text ' for '
+      q.pp @request
+
+
+      q.breakable
+      q.text ' (other possible)' if @others_possible
+    end
+  end
+
+  def version
+    @spec.version
+  end
+
+end
+