1 files changed, 28 insertions, 0 deletions
diff --git a/lib/rdoc/ri/gemdirs.rb b/lib/rdoc/ri/gemdirs.rb
new file mode 100644
index 0000000000..0bca992bca
--- /dev/null
+++ b/lib/rdoc/ri/gemdirs.rb
@@ -0,0 +1,28 @@
+module RDoc::RI::Paths
+  begin
+    require 'rubygems' unless defined?(Gem)
+
+    # HACK dup'd from Gem.latest_partials and friends
+    all_paths = []
+
+    all_paths = Gem.path.map do |dir|
+      Dir[File.join(dir, 'doc/*/ri')]
+    end.flatten
+
+    ri_paths = {}
+
+    all_paths.each do |dir|
+      if %r"/([^/]*)-((?:\d+\.)*\d+)/ri\z" =~ dir
+        name, version = $1, $2
+        ver = Gem::Version.new(version)
+        if !ri_paths[name] or ver > ri_paths[name][0]
+          ri_paths[name] = [ver, dir]
+        end
+      end
+    end
+
+    GEMDIRS = ri_paths.map { |k,v| v.last }.sort
+  rescue LoadError
+    GEMDIRS = []
+  end
+end