A Rails 3 rake task for renaming the application

rename.rake

namespace 'rails' do
  desc 'Renames the current app'
  task 'rename' do
    # Get the new name
    new_name = ENV["NEW_NAME"].capitalize || nil 
    if new_name.nil?
      puts "\nYou must pass in a new name"
      exit
    end
    
    # Get the current name of the app
    current_name = IO.readlines('config/routes.rb').first.split('::')[0]
    
    puts "Renaming #{current_name} to #{new_name}"
    
    files = [ 'config.ru',
              'rakefile',
              'config/application.rb',
              'config/environment.rb',
              'config/routes.rb',
              'config/environments/development.rb',
              'config/environments/test.rb',
              'config/environments/production.rb',
              'config/initializers/secret_token.rb',
              'config/initializers/session_store.rb' ]
    
    files.each do |file|
      puts "  Updating #{file}"
      
      input = IO.read(file)
      
      output = File.new file, 'w'
      output << input.gsub(current_name, new_name)
      output.close
    end
  end
end