A capistrano extension for sending deploy messages to yammer

Yammerstrano.rb

Capistrano::Configuration.instance(:must_exist).load do
  require 'httparty'

  before "deploy", "yammer:notify_deploy_start"
  after "deploy", "yammer:notify_deploy_success"
  after "deploy:rollback", "yammer:notify_deploy_fail"
  
  namespace :yammer do    
    desc "Notify a Yammer account that a deploy just started"
    task :notify_deploy_start do
      Yammer.new(application, branch, exists?(:stage) ? stage : nil).notify("Started deploying")
    end

    desc "Notify a Yammer account that a deploy just finished"
    task :notify_deploy_success do
      Yammer.new(application, branch, exists?(:stage) ? stage : nil).notify("Successfully deployed", " YAY!")
    end


    desc "Notify a Yammer account that a deploy just failed"
    task :notify_deploy_fail do
      Yammer.new(application, branch, exists?(:stage) ? stage : nil).notify("Failed to deploy", ", OH NO!")
    end
  end

  class Yammer
    include HTTParty
    base_uri 'https://www.yammer.com'
    
    def initialize(application, branch, stage)
      @app = application
      @branch = branch
      @stage = stage
      
      @consumer_key = "x"
      @consumer_secret = "x"
      @oauth_token = "x"
      @oauth_token_secret = "x"
      @oauth_verifier = "x"
      @oauth_signature = "#{@consumer_secret}%26#{@oauth_token_secret}"
      @auth_header = "OAuth oauth_consumer_key=#{@consumer_key},oauth_token=#{@oauth_token},oauth_signature_method=PLAINTEXT,oauth_timestamp=1297382941014,oauth_nonce=545746008,oauth_verifier=#{@oauth_verifier},oauth_signature=#{@oauth_signature}"
    end
    
    def notify(pre, post = "")
      message = "#{pre} #{@app} (#{@branch})"
      message += " to #{@stage}" unless @stage.blank?
      message += "#{post}" unless post.blank?
      
      options = {:query => {:body => message}, :headers => {"Authorization" => @auth_header}}
      
      self.class.post("/api/v1/messages.json", options)
    end
  end
end