From: Patrick Hurley <phurley@...>
Date: 2005-06-20T02:26:19+09:00
Subject: Wrapped load

I am building an internal batch processor -- I am not worried about
malicious code (rm -rf *) type stuff, but I would like to be able to
run most any ruby code without worrying about side effects in the
batch processor, so a wrapped load sounded perfect.

I wanted to isolate changes to existing classes, so I put together
this ever useful program (foo.rb):

module Kernel
  alias old_puts puts

  def puts(*args)
    args.each do |stuff|
      old_puts "Fancy #{stuff}"
    end
  end

  def boo(x)
    puts x ** 2
  end

end

puts "Wow"


------------------------------ and then this even more impressive test
body ------
puts "One"
load('foo.rb', true)
puts "Two"
load('foo.rb', false)
puts "Three"

-------------------------------------------------------------------------------------------------------
Which outputs:

One
Wow
Two
Fancy Wow
Fancy Three

What I really wanted was:
One
Fancy Wow              (how do I get this?)
Two
Fancy Wow
Fancy Three

As it stands the wrapped code does not execute the same -- is there a
way to get it to, without having those effects leak into the loading
application?

Thanks
Patrick