Add growl 1.3 to buildr

buildfile

# Add this to a buildr 'buildfile' to receive growl notifications when compilation
# completes or fails (including cc compilations)

require 'ruby_gntp'

 # Growl setup
 Buildr.application.on_completion do |title, message|
   GNTP.notify({
     :app_name => "buildr",
     :title    => title, 
     :text     => message,
   })
 end

 Buildr.application.on_failure do |title, message|
   GNTP.notify({
     :app_name => "buildr",
     :title    => title, 
     :text     => message,
   })
 end

If you add this gist as a patch on https://issues.apache.org/jira/browse/BUILDR-631 and make sure to click the checkbox to give copyright to the Apache Foundation, we can incorporate your patch in Buildr trunk. Otherwise, I will do a gem based on your code. Thanks for doing the work !

Just uploaded the code as a file to the issue with copyright permission. Also included some notes and links to ruby_gntp documentation. How are you planning to integrate it?

We have growl integration but I'm not sure it works with 1.3. I would replace the current code by the code you provide and make an optional dependency on the gem you used, ruby_gntp.
https://github.com/apache/buildr/blob/trunk/lib/buildr/core/osx.rb