environment.rb

puts 'top'
RAILS_GEM_VERSION = '1.1.4'

require File.join(File.dirname(__FILE__), 'boot')

puts 'here'
Rails::Initializer.run do |config|
end
puts 'end'

puts 'bottom'

plugin:
class Foobar
  puts 'called'
end

stdout:
** Starting Mongrel listening at 0.0.0.0:3060
** Starting Rails with development environment ...
top
here
called
end
bottom