tells you the latest version number of a gem

latest

#!/usr/bin/env ruby

require 'httpclient'
require 'json'

if ARGV.any?
  gems = ARGV
else
  puts 'feed me some gem name(s)!'
  exit
end

client = HTTPClient.new
endpoint = 'https://rubygems.org/api/v1'

gems.each do |gem|
  url = "#{endpoint}/gems/#{gem}.json"
  response = client.get(url)

  if response.status == 404
    puts "#{gem}: does not exist"
  else
    data = JSON.parse(response.body)
    version = data['version']

    puts "#{gem}: #{version}"
  end
end

chmod +x latest
latest sinatra rails