Here's a small thing I made that parses file_id.diz files from inside zip files and outputs some files into Internet Archive metadata format. I used this one to populate https://archive.org/details/suomipelit?tab=collection

indexer.rb

#!/usr/bin/env ruby

require 'csv'
require 'zip'
require 'pp'

Zip.force_entry_names_encoding = 'ISO-8859-1'

entries = []


Dir.glob("*.zip").each do |file|
        Zip::File.open(file) do |zipfile|
                zipfile.entries.each do |entry|
                        if entry.name.downcase == 'file_id.diz'
                                entryhash = {filename: file}
                                fd = entry.get_input_stream
                                fd.readlines.each do |line|
                                         line.encode!('UTF-8', 'Windows-1252')
                                         linevalue = line.split(':')[1]
                                         next if linevalue.nil?
                                         linevalue.strip!
                                         if line =~ /Tekij/
                                                 entryhash[:author] = linevalue
                                         elsif line =~ /Nimi/
                                                 entryhash[:name] = linevalue
                                         elsif line =~ /Versio/
                                                 entryhash[:version] = linevalue
                                         end
                                end
                                entries << entryhash
                        end
                end
        end
end

CSV.open("pelit.csv", "wb") do |csv|
  entries.each do |entry|
    csv << ["suomipelit-#{entry[:filename]}", entry[:filename], "#{entry[:name]} #{entry[:version]}", entry[:author]]
  end
end
pp entries