1 files changed, 35 insertions, 0 deletions
diff --git a/lib/rubygems/indexer/latest_index_builder.rb b/lib/rubygems/indexer/latest_index_builder.rb
new file mode 100644
index 0000000000..a5798580a6
--- /dev/null
+++ b/lib/rubygems/indexer/latest_index_builder.rb
@@ -0,0 +1,35 @@
+require 'rubygems/indexer'
+
+##
+# Construct the latest Gem index file.
+
+class Gem::Indexer::LatestIndexBuilder < Gem::Indexer::AbstractIndexBuilder
+
+  def start_index
+    super
+
+    @index = Gem::SourceIndex.new
+  end
+
+  def end_index
+    super
+
+    latest = @index.latest_specs.sort.map { |spec| spec.original_name }
+
+    @file.write latest.join("\n")
+  end
+
+  def cleanup
+    super
+
+    compress @file.path
+
+    @files.delete 'latest_index' # HACK installed via QuickIndexBuilder :/
+  end
+
+  def add(spec)
+    @index.add_spec(spec)
+  end
+
+end
+