gistfile1.txt

require 'openssl'
require 'pathname'

ext_names = %w(.gz .bz2 .zip .xz)
dirs = %w(1.0 1.1a 1.1b 1.1c 1.1d 1.2 1.3 1.4 1.6 1.8 1.9 2.0 2.1 2.2 2.3)

File.open('index.txt', 'w') do |f|
  dirs.each do |dir|
    Dir["/home/ftp/pub/ruby/#{dir}/*"].each do |pkg|
      next unless ext_names.include?(Pathname(pkg).extname)
      next unless pkg =~ /ruby-/

      %w(SHA1 SHA256 SHA512).each do |algm|
        digest = Object.const_get("OpenSSL::Digest::#{algm}").hexdigest(File.read(pkg))
        f.puts "#{Pathname(pkg).basename}\thttps://cache.ruby-lang.org/pub/ruby/#{dir}/#{Pathname(pkg).basename}\t#{algm}\t#{digest}"
      end
    end
  end
end