Add a Rake task and Sinatra script for a GitHub post-receive hook.

Rakefile

@@ -116,6 +116,10 @@ task :release_edge do
   sh %{rubyforge add_release haml haml-edge "Bleeding Edge (v#{edge_version})" pkg/haml-edge-#{edge_version}.gem}
 end
 
+task :watch_for_edge_update do
+  sh %{ruby edge_gem_watch.rb}
+end
+
 # ----- Documentation -----
 
 begin

extra/edge_gem_watch.rb

@@ -0,0 +1,13 @@
+require 'rubygems'
+require 'sinatra'
+require 'json'
+set :port, 3123
+set :environment, :production
+Dir.chdir(File.dirname(__FILE__) + "/..")
+
+post "/" do
+  payload = JSON.parse(params["payload"])
+
+  break unless payload["ref"] == "refs/heads/master"
+  system("rake release_edge &> edge-gem-output.log")
+end