On Ruby on Rails, where is "commands/server" which is required by script/server?

Question

Rails's script/server is just a few lines:

#!/usr/bin/env ruby
require File.expand_path('../../config/boot',  __FILE__)
require 'commands/server'

I wonder where the server file is? I tried a

find . -name 'server.*' 
find . -name 'server' 

but can't find it

Answer 1

It should be under your Rails gem directory, in lib/commands. On my machine:

/opt/ruby-1.8.7-p302/lib/ruby/gems/1.8/gems/rails-2.3.8/lib/commands/server.rb

Answer 2

thanks. in the case of a Mac, I found that they are on

/Library/Ruby/Gems/1.8/gems/rails-2.3.5/lib/commands/server.rb
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb
/Users/peter/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/server.rb

the following are there but doesn't have my Rails 2.3.5 version:

/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/rails-1.2.6/lib/commands/server.rb       
/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/rails-2.2.2/lib/commands/server.rb

Update: Now the question is: which of the above 3 is the one? How can you tell easily?