Ruby auto-restart script for localtunnel

localtunnel.rb

# https://github.com/localtunnel/localtunnel/issues/81#issuecomment-218320442
# usage: ruby localtunnel.rb --port 3000 --subdomain yourdomainhere

require 'optparse'

options = { subdomain: 'defaultdomain', port: 3000 }

parser = OptionParser.new do |opts|
  opts.banner = 'Usage: localtunnel.rb [options]'
  opts.on('-s', '--subdomain subdomain', 'Subdomain') do |subdomain|
    options[:subdomain] = subdomain
  end

  opts.on('-p', '--port port', 'Port') do |port|
    options[:port] = port
  end

  opts.on('-h', '--help', 'Displays Help') do
    puts opts
    exit
  end
end

parser.parse!

def ordinal(number)
  abs_number = number.to_i.abs

  if (11..13).cover?(abs_number % 100)
    'th'
  else
    case abs_number % 10
    when 1 then 'st'
    when 2 then 'nd'
    when 3 then 'rd'
    else 'th'
    end
  end
end

def ordinalize(number)
  "#{number}#{ordinal(number)}"
end

launch_count = 0

while true
  launch_count += 1
  puts "Running localtunnel for the #{ordinalize(launch_count)} time on https://#{options[:subdomain]}.localtunnel.me, port #{options[:port]}"
  `lt --port #{options[:port]} --subdomain #{options[:subdomain]}`
end