Rails::GemBoot

    # File examples/rails-test-app/config/boot.rb, line 73
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

    # File examples/rails-test-app/config/boot.rb, line 83
83:       def load_rubygems
84:         require 'rubygems'
85: 
86:         unless rubygems_version >= '0.9.4'
87:           $stderr.puts %(Rails requires RubyGems >= 0.9.4 (you have #{rubygems_version}). Please `gem update --system` and try again.)
88:           exit 1
89:         end
90: 
91:       rescue LoadError
92:         $stderr.puts %(Rails requires RubyGems >= 0.9.4. Please install RubyGems and try again: http://rubygems.rubyforge.org)
93:         exit 1
94:       end

    # File examples/rails-test-app/config/boot.rb, line 96
96:       def parse_gem_version(text)
97:         $1 if text =~ /^[^#]*RAILS_GEM_VERSION\s*=\s*["']([!~<>=]*\s*[\d.]+)["']/
98:       end

    # File examples/rails-test-app/config/boot.rb, line 69
69:       def rubygems_version
70:         Gem::RubyGemsVersion if defined? Gem::RubyGemsVersion
71:       end

     # File examples/rails-test-app/config/boot.rb, line 101
101:         def read_environment_rb
102:           File.read("#{RAILS_ROOT}/config/environment.rb")
103:         end

    # File examples/rails-test-app/config/boot.rb, line 51
51:     def load_initializer
52:       self.class.load_rubygems
53:       load_rails_gem
54:       require 'initializer'
55:     end

    # File examples/rails-test-app/config/boot.rb, line 57
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