Log all calls to require in Ruby

log_require_calls.rb

# Logs calls to require so if a required file is blowing up, you can 
# see the last require and diagnose. If your app stops booting, can be handy to 
# find what borked things.

require 'logger'
  
class Object
  def require(file_name)          
    log = Logger.new(File.join(File.dirname(__FILE__), 'required.log'))        
    log.debug("requiring: #{file_name}")     
    super
  end  
end