Makes use of ruby nokogiri to get your public ip by scrapingf duckduckgo.com. Writes results to /tmp and prints it out.

whatismyip.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'nokogiri'
require 'open-uri'

page = Nokogiri::HTML(open("https://duckduckgo.com/html/?q=what%20is%20my%20ip", proxy: ""))
@text = page.css('div#zero_click_abstract')[0].text.strip

open('/tmp/whatismyip', 'w') do |f|
  f.puts @text
end

puts @text

Output

$ whatismyip.rb
Your IP address is 111.222.333.444 in Some City, Some State, United States (zipcode)