Prosty bot do wysylania wiadomości regularnie na jakiś kanał.

gistfile1.rb

# muzang_instance.rb
require 'muzang'
require 'muzang-plugins'

class SendMessageToChannel
  include Muzang::Plugins::Helpers

  def initialize(bot)
    @bot = bot
  end

  def call(connection, message)
    on_join(connection, message) do
      EM.add_timer(120) {
        connection.msg(message.channel, 'Hello World!')
        EM.add_timer(200) { connection.part(message.channel) }
        EM.add_timer(15) { EM.stop }
      }
    end

  end
end

class SendMessage
  def self.send_message
    EM.run do
      @bot = Muzang::Bot.new(irc_host: 'irc.freenode.net',
                            irc_port: 6667,
                            nick: 'PipiLandsztrum',
                            channels: ['#channel'])
      @bot.register_plugin(SendMessageToChannel)
      @bot.start # start after register plugins
    end
  end
end

#Rakefile
require_relative 'muzang_instance'
desc "This task is called by the Heroku cron add-on"
task :cron do
  puts 'sending message...'
  SendMessage.send_message
  puts 'done'
end