Did you know that RubyOSA provides a bridge from Ruby to the Apple Event Manager? It allows Ruby programs to automate Mac OS X applications in the same way as AppleScript.

Here’s an example code in controlling iTunes:

require ‘rbosa’
itunes = OSA.app(‘iTunes’)

track = itunes.current_track
p track #
p track.name # “Over The Rainbow”
p track.artist # “Keith Jarrett”
p track.duration # 362.368988037109
p track.date_added.to_s # “2006-06-30″
p track.enabled? # true

# Play the selected track.
itunes.play

# Fade the volume.
100.times { |i| itunes.sound_volume = i; sleep 0.1 }

# Set iChat’s status message to the current track.
OSA.app(‘iChat’).status_message = “Playing: #{track.name}”

Come on and try this out! :)