/lib/earthquake/commands.rbの"init"ブロック内に追記

zenra.rb

command :zenra do |m|                                                                                                                                        
  require 'open-uri'
  require 'rexml/document'

  sentence = m[1]

  appid    = 'YOUR_YAHOO_APPID'
  position = '動詞'
  text     = '全裸で'
  base_url = 'http://jlp.yahooapis.jp/MAService/V1/parse'

  raise 'appid is not configured.' if appid.nil? || appid.empty?

  req = "#{base_url}?results=ma&appid=#{appid}&sentence=#{URI.encode(sentence)}"
  res = open(req).read
  xml = REXML::Document.new(res)

  return sentence if xml.elements['ResultSet/ma_result/total_count'].text == '0'

  result = ''
  xml.elements.each('ResultSet/ma_result/word_list/word') do |e|
    result << text if e.elements['pos'].text == position
    result << e.elements['surface'].text
  end

  twitter.update(result) if confirm("update '#{result}'")
end