a recovery script for grabbing remaining previews for lost iPhoto/Photos Masters

recover.rb

require 'pathname'
require 'uri'
require 'fileutils'

# Expects a dir arg of exported photos and a .log which contains /var/log/system.log Photo messages generated during the export

dir = Pathname.new(ARGV[0])
log = Pathname.new(dir.basename.to_s + '.log')

recovered_dir = dir + 'recovered'
recovered_dir.mkpath

File.new(log).each_line do |line|
  if match = line.match(/file:\/\/([^',]+)/)
    missing_file = match[1]
    missing_file = URI.unescape(missing_file)

    preview_prefix = File.dirname(missing_file.sub('Masters', 'Previews'))
    preview_file = Dir[preview_prefix + '/*/' + File.basename(missing_file)].first

    if preview_file
      FileUtils.cp preview_file, recovered_dir
    else
      puts "No preview file found for #{missing_file}"
    end
  end
end