config/boot.rb

   1 # Don't change this file!
   2 # Configure your app in config/environment.rb and config/environments/*.rb
   3
   4 RAILS_ROOT = "#{File.dirname(__FILE__)}/.." unless defined?(RAILS_ROOT)
   5
   6 module Rails
   7   class << self
   8     def boot!
   9       unless booted?
  10         preinitialize
  11         pick_boot.run
  12       end
  13     end
  14
  15     def booted?
  16       defined? Rails::Initializer
  17     end
  18
  19     def pick_boot
  20       (vendor_rails? ? VendorBoot : GemBoot).new
  21     end
  22
  23     def vendor_rails?
  24       File.exist?("#{RAILS_ROOT}/vendor/rails")
  25     end
  26
  27     def preinitialize
  28       load(preinitializer_path) if File.exists?(preinitializer_path)
  29     end
  30
  31     def preinitializer_path
  32       "#{RAILS_ROOT}/config/preinitializer.rb"
  33     end
  34   end
  35
  36   class Boot
  37     def run
  38       load_initializer
  39       Rails::Initializer.run(:set_load_path)
  40     end
  41   end
  42
  43   class VendorBoot < Boot
  44     def load_initializer
  45       require "#{RAILS_ROOT}/vendor/rails/railties/lib/initializer"
  46     end
  47   end
  48
  49   class GemBoot < Boot
  50     def load_initializer
  51       self.class.load_rubygems
  52       load_rails_gem
  53       require 'initializer'
  54     end
  55
  56     def load_rails_gem
  57       if version = self.class.gem_version
  58         gem 'rails', version
  59       else
  60         gem 'rails'
  61       end
  62     rescue Gem::LoadError => load_error
  63       $stderr.puts %(Missing the Rails #{version} gem. Please `gem install -v=#{version} rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.)
  64       exit 1
  65     end
  66
  67     class << self
  68       def rubygems_version
  69         Gem::RubyGemsVersion if defined? Gem::RubyGemsVersion
  70       end
  71
  72       def gem_version
  73         if defined? RAILS_GEM_VERSION
  74           RAILS_GEM_VERSION
  75         elsif ENV.include?('RAILS_GEM_VERSION')
  76           ENV['RAILS_GEM_VERSION']
  77         else
  78           parse_gem_version(read_environment_rb)
  79         end
  80       end
  81
  82       def load_rubygems
  83         require 'rubygems'
  84
  85         unless rubygems_version >= '0.9.4'
  86           $stderr.puts %(Rails requires RubyGems >= 0.9.4 (you have #{rubygems_version}). Please `gem update --system` and try again.)
  87           exit 1
  88         end
  89
  90       rescue LoadError
  91         $stderr.puts %(Rails requires RubyGems >= 0.9.4. Please install RubyGems and try again: http://rubygems.rubyforge.org)
  92         exit 1
  93       end
  94
  95       def parse_gem_version(text)
  96         $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*'([!~<>=]*\s*[\d.]+)'/
  97       end
  98
  99       private
 100         def read_environment_rb
 101           File.read("#{RAILS_ROOT}/config/environment.rb")
 102         end
 103     end
 104   end
 105 end
 106
 107 # All that for this:
 108 Rails.boot!