Tweet a message on successful multistage capistrano deployment

twitter.rb

require 'open-uri'
require 'net/http'

namespace :tweet do
  
  desc 'Posts deployment information to twitter'
  task :notify do
    
    begin
      File.open(File.expand_path('~/.twitter')) do |file| 
        @username = file.readline.gsub!(/\n+/, '')
        @password = file.readline.gsub!(/\n+/, '')
      end

      revision = capture("cat #{current_path}/REVISION").chomp
      link = "https://github.com/screenconcept/#{ application }/tree/#{ revision }"

      url = URI.parse('http://twitter.com/statuses/update.xml')
      request = Net::HTTP::Post.new(url.path)
      request.basic_auth @username, @password
      request.set_form_data 'status' => "#{ stage.to_s.upcase }: Deployed #{ application }: #{ link }"
      response = Net::HTTP.new(url.host, url.port).start { |http| http.request(request) }
      
      if response.code.to_i == 200
        logger.info "Tweet, tweet, tweet..."
      else
        logger.important "Deploy tweet failed with #{ response.code }: #{ response.message }!"
      end

    rescue Errno::ENOENT
      logger.important "Please configure your twitter account settings to automatically tweet deploys!"
    end
    
  end
end