Updating for rails 2.2.2
[rails.git] / 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     end
48   end
49
50   class GemBoot < Boot
51     def load_initializer
52       self.class.load_rubygems
53       load_rails_gem
54       require 'initializer'
55     end
56
57     def load_rails_gem
58       if version = self.class.gem_version
59         gem 'rails', version
60       else
61         gem 'rails'
62       end
63     rescue Gem::LoadError => load_error
64       $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.)
65       exit 1
66     end
67
68     class << self
69       def rubygems_version
70         Gem::RubyGemsVersion rescue nil
71       end
72
73       def gem_version
74         if defined? RAILS_GEM_VERSION
75           RAILS_GEM_VERSION
76         elsif ENV.include?('RAILS_GEM_VERSION')
77           ENV['RAILS_GEM_VERSION']
78         else
79           parse_gem_version(read_environment_rb)
80         end
81       end
82
83       def load_rubygems
84         require 'rubygems'
85         min_version = '1.3.1'
86         unless rubygems_version >= min_version
87           $stderr.puts %Q(Rails requires RubyGems >= #{min_version} (you have #{rubygems_version}). Please `gem update --system` and try again.)
88           exit 1
89         end
90
91       rescue LoadError
92         $stderr.puts %Q(Rails requires RubyGems >= #{min_version}. Please install RubyGems and try again: http://rubygems.rubyforge.org)
93         exit 1
94       end
95
96       def parse_gem_version(text)
97         $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
98       end
99
100       private
101         def read_environment_rb
102           File.read("#{RAILS_ROOT}/config/environment.rb")
103         end
104     end
105   end
106 end
107
108 # All that for this:
109 Rails.boot!