Rails 3 on App Engine - from hg files

rails_appengine.rb

#!/usr/bin/ruby
require 'rubygems'

file_base = 'http://appengine-jruby.googlecode.com/hg/demos/rails/'
mod_files = %w{ app/controllers/rails/info_controller.rb
                Gemfile config/application_rb config/boot.rb
                config/initializers/notifications.rb config_ru }

# Install apengine gems if missing
gems_index = Gem::SourceIndex.from_gems_in('local')
unless gems_index.find_name('google-appengine', '>=0.0.6')
  run 'gem install google-appengine', :sudo => true
end

system "curl -O #{file_base}Gemfile"
system 'appcfg.rb bundle . --update'
system 'appcfg.rb run bin/rails .' # answer yes to all

mod_files.each do |path|
  system "curl -o #{path} #{file_base}#{path}"
end

# TODO: prepend confir_ru to config.ru 

# TODO: insert config/application_rb into config/application.rb