Adds Code for generating a gemspec for github

Rakefile

@@ -85,6 +85,40 @@ task :uninstall => :clean do
   sh %{#{SUDO} gem uninstall #{NAME}}
 end
 
+namespace :github do
+  desc "Update Github Gemspec"
+  task :update_gemspec do
+    skip_fields = %w(new_platform original_platform)
+    integer_fields = %w(specification_version)
+
+    result = "Gem::Specification.new do |s|\n"
+    spec.instance_variables.each do |ivar| 
+      value = spec.instance_variable_get(ivar)
+      name  = ivar.split("@").last
+      next if skip_fields.include?(name) || value.nil? || value == "" || (value.respond_to?(:empty?) && value.empty?)
+      if name == "dependencies"
+        value.each do |d| 
+          dep, *ver = d.to_s.split(" ")
+          result <<  "  s.add_dependency #{dep.inspect}, #{ver.join(" ").inspect.gsub(/[()]/, "")}\n"
+        end
+      else
+        case value
+        when Array
+          value =  name != "files" ? value.inspect : value.inspect.split(",").join(",\n")
+        when String
+          value = value.to_i if integer_fields.include?(name)
+          value = value.inspect
+        else
+          value = value.to_s.inspect
+        end
+        result << "  s.#{name} = #{value}\n"
+      end
+    end
+    result << "end"
+    File.open(File.join(File.dirname(__FILE__), "#{spec.name}.gemspec"), "w"){|f| f << result}
+  end
+end
+
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 # Documentation
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