Perform partial updates when uploading gems.

Gemfile.lock

@@ -14,9 +14,9 @@ GEM
       rack
     rake (0.9.2)
     sinatra (1.3.1)
-      rack (>= 1.3.4, ~> 1.3)
-      rack-protection (>= 1.1.2, ~> 1.1)
-      tilt (>= 1.3.3, ~> 1.3)
+      rack (~> 1.3, >= 1.3.4)
+      rack-protection (~> 1.1, >= 1.1.2)
+      tilt (~> 1.3, >= 1.3.3)
     tilt (1.3.3)
 
 PLATFORMS

lib/geminabox.rb

@@ -49,13 +49,13 @@ def fixup_bundler_rubygems!
   end
 
   get '/reindex' do
-    reindex
+    reindex(:force_rebuild)
     redirect url("/")
   end
 
   delete '/gems/*.gem' do
     File.delete file_path if File.exists? file_path
-    reindex
+    reindex(:force_rebuild)
     redirect url("/")
   end
 
@@ -108,9 +108,14 @@ def error_response(code, message)
     [code, html]
   end
 
-  def reindex
+  def reindex(force_rebuild = false)
     Geminabox.fixup_bundler_rubygems!
-    indexer.generate_index
+    force_rebuild = true if settings.build_legacy
+    if force_rebuild
+      indexer.generate_index
+    else
+      indexer.update_index
+    end
   end
 
   def indexer