Lazy code to move gems from one gem inabox to another. requires the gem inabox to be installed

transfer_gems_from_geminaox.rb

#!/usr/bin/env ruby
require 'net/http'
require 'open-uri'
require 'tempfile'

require File.expand_path('ruby_bash', __dir__).to_s
options = {}

parser = OptionParser.new do |opts|
  opts.banner = 'Usage: replicate gem inabox'

  opts.on('-f', '--from [HOST]', String) do |host|
    options[:from_host] = host
  end

  opts.on('-t', '--to [HOST]', String) do |host|
    options[:to_host] = host
  end

  opts.on_tail('-h', '--help', 'Prints this help') do
    puts opts
    exit
  end
  options
end
parser.parse!

class DownloadGemInabox
  attr_reader :to, :from

  def initialize(to, from)
    @to = URI(to)
    @from = URI(from)
  end

  def call
    to_paths = to_gems_urls.map(&:path)
    from_gem_urls.each_with_index do |url, index|
      next puts "Already Exists #{url.path} #{from_gem_urls.size - index}" if to_paths.include?(url.path)

      print "Downloading #{url.path} #{from_gem_urls.size - index}                                            \r"
      gemname = url.path.gsub('/gems/', '').gsub('.gem', '')
      file = download(gemname, url)
      print "Uploading #{url.path} #{from_gem_urls.size - index}                                              \r"
      system!("gem inabox #{file.path} -g #{to}")
      file.unlink
      puts "Uploaded #{url.path} #{from_gem_urls.size - index}                                                 "
    end
  end

  private

  def download(gemname, uri)
    Tempfile.new(gemname).tap do |file|
      Net::HTTP.start(uri.host, uri.port, use_ssl: uri.is_a?(URI::HTTPS)) do |http|
        request = Net::HTTP::Get.new uri
        file.write(http.request(request).body)
      end
      file.close
    end
  end

  def to_gems_urls
    @to_gems_urls ||= gem_urls(to)
  end

  def from_gem_urls
    @from_gem_urls ||= gem_urls(from)
  end

  def gem_urls(uri)
    Net::HTTP.start(uri.host, uri.port, use_ssl: uri.is_a?(URI::HTTPS)) do |http|
      request = Net::HTTP::Get.new uri
      http.request(request).body
    end.scan(%r{/gems/.*.gem}).uniq.map { |x| URI.join(uri, x) }
  end
end
Errors.add('From host is missing --from') if options[:from_host].to_s == ''
Errors.add('To host is missing --to') if options[:to_host].to_s == ''
abort_and_display_errors
DownloadGemInabox.new(options[:to_host], options[:from_host]).call