Question

When starting the Rails 3.x server (rails s), is it possible to print the path and name of each file as it is being loaded?

Something like below, but for every file that is required by Rails (think loading of each railtie, for example):

Loading boot.rb...
Loading application.rb...
Loading environment.rb...
Loading development.rb...
Loading routes.rb...

Note that I am able to do the above simply by using puts calls in the files above, but that is not what I am aiming for. Instead I would like to print the file name being required by any code, not just in my application but whenever require is called. For example, printing file names for calls to require being made inside the Rails code.

UPDATE

Thanks @ScottJShea. I used the following code:

In application.rb:

require File.expand_path('../boot', __FILE__)

module Kernel
  def require_and_print(string)
    puts string
    require_original(string)
  end
  alias_method :require_original, :require
  alias_method :require, :require_and_print
end
....

Answer 1

Looks like you would need to edit kernel.rb. Here is an SO Post about it where the responder suggests this (although you may ant to limit it to the require method):

module Kernel
  def load_and_print(string)
    $:.each do |p|
      if File.exists? File.join(p, string)
        puts File.join(p, string)
        break
      end
    end
    load_original(string)
  end

  alias_method :load_original, :load
  alias_method :load, :load_and_print

end