- STDERR.puts %(Cannot find gem for Rails ~>#{version}.0:
- Install the missing gem with 'gem install -v=#{version} rails', or
- change environment.rb to define RAILS_GEM_VERSION with your desired version.
- )
+ gem 'rails'
+ end
+ rescue Gem::LoadError => load_error
+ $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.)
+ exit 1
+ end
+
+ class << self
+ def rubygems_version
+ Gem::RubyGemsVersion if defined? Gem::RubyGemsVersion
+ end
+
+ def gem_version
+ if defined? RAILS_GEM_VERSION
+ RAILS_GEM_VERSION
+ elsif ENV.include?('RAILS_GEM_VERSION')
+ ENV['RAILS_GEM_VERSION']
+ else
+ parse_gem_version(read_environment_rb)
+ end
+ end
+
+ def load_rubygems
+ require 'rubygems'
+
+ unless rubygems_version >= '0.9.4'
+ $stderr.puts %(Rails requires RubyGems >= 0.9.4 (you have #{rubygems_version}). Please `gem update --system` and try again.)
+ exit 1
+ end
+
+ rescue LoadError
+ $stderr.puts %(Rails requires RubyGems >= 0.9.4. Please install RubyGems and try again: http://rubygems.rubyforge.org)