Ruby shell script to get 'My Stories' from PivotalTracker and format them for github to pivotal api friendliness

ptstories.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'highline'
require 'xmlsimple'
require 'uri'

# Retrieves stories a user owns from  PivotalTracker API 
# Formats the name and story number for pivotial friendly commit messages.
# 
# Add this to .bash_profile or .bashrc and replace the values with your information:
#   ## pivotal tracker API call variables
#   export PT_API_KEY='_YOUR_API_KEY_'
#   export PT_PROJECT_KEY='_PROJECT_NUMBER_'
#   export PT_STORY_OWNER='_YOUR_NAME_'
# 
# Put a string as an argument when calling the script to prepend text to the story name - default string is 'www'
# $ ptstory enet
# $ ptstory 'I like cheese'

class PtStory

  def initialize
    @argv = !$*.empty? ? $* : 'www'
    @ids_titles = []
    @formatted = []
    get_pt_stories
  end

  def ui
    @ui ||= HighLine.new
  end

  def get_pt_stories
    
    # curl -H "X-TrackerToken: TOKEN" -X GET http://www.pivotaltracker.com/services/v3/projects/PROJECT_ID/stories?filter=label%3A%22needs%20feedback%22%20type%3Abug
    
    stories = XmlSimple.xml_in(`curl -s -H "X-TrackerToken: #{ENV['PT_API_KEY']}" -X GET http://www.pivotaltracker.com/services/v3/projects/#{ENV['PT_PROJECT_KEY']}/stories?filter=owner%3A%22#{URI.escape(ENV['PT_STORY_OWNER'])}%22`)
    if stories.is_a?(Hash)
      stories['story'].each {|s| @ids_titles <<  [s['id'][0]['content'],  s['name']] }
      @ids_titles.each_index {|x| @formatted << "[##{@ids_titles[x][0]}] #{@argv} - #{@ids_titles[x][1]}"}
      puts '-' * 80
      @formatted.each_index {|x| puts "#{x.to_s.rjust(2)}: #{@formatted[x]}"}
      puts '-' * 80
    elsif stories.is_a?(String)
      raise "API ERROR: #{stories}"
    else
      raise "Something is very wrong…"
    end
  end

  def which_one
    choice = ''
    loop do
      prompt = "Enter number of story commit message to copy to clipboard:"
      choice = ui.ask(prompt)

      if /^\d+$/ =~ choice.to_s && choice.to_i <= @formatted.length-1
        `echo "#{@formatted[choice.to_i]}" | pbcopy`
        puts "Copied to clipboard: \e[1;36m#{@formatted[choice.to_i ]}\e[0m"
        return true
      else
        $stderr.puts ">>>try again<<<"
      end
    end
  end

end

stories = PtStory.new
stories.which_one