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.exist?(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       Rails::Initializer.run(:install_gem_spec_stubs)
  47       Rails::GemDependency.add_frozen_gem_path
  48     end
  49   end
  50
  51   class GemBoot < Boot
  52     def load_initializer
  53       self.class.load_rubygems
  54       load_rails_gem
  55       require 'initializer'
  56     end
  57
  58     def load_rails_gem
  59       if version = self.class.gem_version
  60         gem 'rails', version
  61       else
  62         gem 'rails'
  63       end
  64     rescue Gem::LoadError => load_error
  65       $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.)
  66       exit 1
  67     end
  68
  69     class << self
  70       def rubygems_version
  71         Gem::RubyGemsVersion rescue nil
  72       end
  73
  74       def gem_version
  75         if defined? RAILS_GEM_VERSION
  76           RAILS_GEM_VERSION
  77         elsif ENV.include?('RAILS_GEM_VERSION')
  78           ENV['RAILS_GEM_VERSION']
  79         else
  80           parse_gem_version(read_environment_rb)
  81         end
  82       end
  83
  84       def load_rubygems
  85         require 'rubygems'
  86         min_version = '1.3.1'
  87         unless rubygems_version >= min_version
  88           $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
  89           exit 1
  90         end
  91
  92       rescue LoadError
  93         $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
  94         exit 1
  95       end
  96
  97       def parse_gem_version(text)
  98         $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
  99       end
 100
 101       private
 102         def read_environment_rb
 103           File.read("#{RAILS_ROOT}/config/environment.rb")
 104         end
 105     end
 106   end
 107 end
 108
 109 # All that for this:
 110 Rails.boot!