Yan Pritzker photographer, entrepreneur, software engineer, musician, skier

Tracking down stray console messages in Ruby

Posted 31 May 2007 @ 5pm | Tagged planypus, rails, ruby

Submit to HN

While working on Planypus we recently ran into an issue where something was outputting strange messages to the console. Luckily, Anton Mostovoy figured out a clever dynamic Ruby hack to track who was outputting the message:

$stdout.instance_eval do
 alias :inner_puts :write
 def write (str)
   inner_puts %Q!#{str} was said by #{caller.join("\n")}!
 end
end

Like Magic!