Convert an emulationstation based dir to a miyoo mini v2 compatible one

emu2miyoo.rb

#!/usr/bin/env ruby
# frozen_string_literal: true
# encoding: utf-8

require 'fileutils'
require 'nokogiri'

SOURCE_IMG_DIR = 'media/covers'
TARGET_IMG_DIR = 'Imgs'
UNUSED_ELEMENTS = %w[desc developer genre kidgame marquee players rating releasedate publisher video]

root = ARGV.first || '.'

source_xml_file = File.join(root, 'gamelist.xml')
target_xml_file = File.join(root, 'miyoogamelist.xml')
xml = Nokogiri.parse(File.read(source_xml_file))
games = xml.xpath('//gameList/game')
games.each do |game|
  thumb = game.elements.detect { |e| e.name == 'thumbnail' }
  image = game.elements.detect { |e| e.name == 'image' }
  if thumb.children.empty?
    name_element = game.elements.detect { |e| e.name == 'name' }
    name = name_element ? name_element.children.first.content : 'UNKNOWN'
    warn "No thumbnail image found for title '#{name}'!"
    exit
  end
  image.children = thumb.children
  image.children.first.content = image.children.first.content.gsub(SOURCE_IMG_DIR, TARGET_IMG_DIR)
  thumb.remove
  UNUSED_ELEMENTS.each do |name|
    element = game.elements.detect { |e| e.name == name }
    next unless element

    element.remove
  end
end
File.open(target_xml_file, 'w') { |f| f.puts xml.to_s.gsub(/\n\s+\n/, "\n") }

File.unlink(source_xml_file)
FileUtils.rm_rf('Imgs')
FileUtils.mv(SOURCE_IMG_DIR, TARGET_IMG_DIR)
FileUtils.rm_rf('media')