A rails 2.3 template which adds bundler 0.9.12 support to a new rails app

rails23-bundler-template.rb

file 'config/preinitializer.rb', <<-PRE
# Use bundled gems
begin
  require File.expand_path('../../.bundle/environment', __FILE__)
rescue LoadError
  # This setup deliberately requires that the application be locked.
  # For an alternative, see http://gist.github.com/302406#file_preinitializer.rb
  if File.exist?(File.expand_path('../../Gemfile.lock', __FILE__))
    raise "Application is locked but not installed.  Run `bundle install` and then try again."
  else
    raise "Application is not locked.  Run `bundle install --relock` and then try again."
  end
end
PRE

file 'Gemfile', <<-GEMFILE
source :gemcutter
gem 'rails', '2.3.5', :require => nil
# Switch to the appropriate gem for your database
gem 'sqlite3-ruby'
GEMFILE

gsub_file 'config/boot.rb', "# All that for this:\nRails.boot!" do |match|
  <<-BOOT
# Use bundler
class Rails::Boot
  def run
    load_initializer
    extend_environment
    Rails::Initializer.run(:set_load_path)
  end

  def extend_environment
    Rails::Initializer.class_eval do
      old_load = instance_method(:load_environment)
      define_method(:load_environment) do
        Bundler.require :default, Rails.env
        old_load.bind(self).call
      end
    end
  end
end
# end bundler support
 
#{match}
BOOT
end

run "bundle install --relock"
if $? != 0
  log "FAILURE", "bundle is not on the path.  Install bundler and then run `bundle install --relock`."
end