Updates old, flat media/ webpacker paths to use the proper nested path, from manifest.json

replace_pack_media.rb

require 'json'

regex = /(?<quote>['"])media\/(?<name>.*?)\k<quote>/

manifest = JSON.load File.read('./public/packs/manifest.json')

glob = File.join 'app', '**', '*.*'

Dir[glob].each do |filename|
  next unless filename =~ /^app\/.*\.(erb|rb|js|css|sass|scss|coffee|es6|jsx)$/

  content = File.foreach(filename).map do |line|
    match = regex.match line
    next line unless match

    path = match[0]
    name = match[:name]

    puts "\n#{filename}"
    escaped = Regexp.escape(name).gsub(/\\#\\{.*?\\}/, '.*?')
    pattern = /^media\/(?<path>.*?)\/#{escaped}$/

    target = manifest.keys.lazy
      .map { |k| pattern.match k }
      .find(&:itself)&.[](:path)

    final_path = path.gsub('media/', "media/#{target}/")
    puts "#{path} -> #{final_path}"

    line.gsub(path, final_path)
  end

  File.open(filename, 'w') do |file|
    content.each { |line| file << line }
  end
end