HerokuLogger Class, allows you to tail the heroku logs through hackery.

heroku_logger.rb

class HerokuLogger
  
  def initialize
    @keep_processing = true
    @log = nil
    
    stop_tailing = Proc.new do
      puts "---------------------- Terminating ------------------------"
      @keep_processing = false
    end

    Signal.trap("INT", stop_tailing)
    Signal.trap("TERM", stop_tailing)
  end
  
  def process
    while @keep_processing
      if fetch_log
        print @log
      else
        sleep(2)
      end
    end
  end

  def fetch_log
    log = `heroku logs`
    if new_output?(log)
      @log = log
      return true
    end
    
    false
  end
  
  def new_output?(data)
    data != @log
  end
  
  def self.process
    new.process
  end
  
end

HerokuLogger.process