1 files changed, 40 insertions, 0 deletions
diff --git a/jni/ruby/lib/rubygems/source/installed.rb b/jni/ruby/lib/rubygems/source/installed.rb
new file mode 100644
index 0000000..bd05c75
--- /dev/null
+++ b/jni/ruby/lib/rubygems/source/installed.rb
@@ -0,0 +1,40 @@
+##
+# Represents an installed gem.  This is used for dependency resolution.
+
+class Gem::Source::Installed < Gem::Source
+
+  def initialize # :nodoc:
+    @uri = nil
+  end
+
+  ##
+  # Installed sources sort before all other sources
+
+  def <=> other
+    case other
+    when Gem::Source::Git,
+         Gem::Source::Lock,
+         Gem::Source::Vendor then
+      -1
+    when Gem::Source::Installed then
+      0
+    when Gem::Source then
+      1
+    else
+      nil
+    end
+  end
+
+  ##
+  # We don't need to download an installed gem
+
+  def download spec, path
+    nil
+  end
+
+  def pretty_print q # :nodoc:
+    q.text '[Installed]'
+  end
+
+end
+