1 files changed, 58 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/resolver/installed_specification.rb b/jni/ruby/lib/rubygems/resolver/installed_specification.rb
new file mode 100644
index 0000000..2a2b89a
--- /dev/null
+++ b/jni/ruby/lib/rubygems/resolver/installed_specification.rb
@@ -0,0 +1,58 @@
+##
+# An InstalledSpecification represents a gem that is already installed
+# locally.
+
+class Gem::Resolver::InstalledSpecification < Gem::Resolver::SpecSpecification
+
+  def == other # :nodoc:
+    self.class === other and
+      @set  == other.set and
+      @spec == other.spec
+  end
+
+  ##
+  # This is a null install as this specification is already installed.
+  # +options+ are ignored.
+
+  def install options = {}
+    yield nil
+  end
+
+  ##
+  # Returns +true+ if this gem is installable for the current platform.
+
+  def installable_platform?
+    # BACKCOMPAT If the file is coming out of a specified file, then we
+    # ignore the platform. This code can be removed in RG 3.0.
+    return true if @source.kind_of? Gem::Source::SpecificFile
+
+    super
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 2, '[InstalledSpecification', ']' do
+      q.breakable
+      q.text "name: #{name}"
+
+      q.breakable
+      q.text "version: #{version}"
+
+      q.breakable
+      q.text "platform: #{platform}"
+
+      q.breakable
+      q.text 'dependencies:'
+      q.breakable
+      q.pp spec.dependencies
+    end
+  end
+
+  ##
+  # The source for this specification
+
+  def source
+    @source ||= Gem::Source::Installed.new
+  end
+
+end
+