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# coding: utf-8

require 'mini_exiftool'
require 'find'

Find.find('files') do |f|
  next unless File.file? f
  begin
    exif = MiniExiftool.new f
  rescue
    puts 'エラー: ' + f
    next
  end
  originaltime = exif.datetimeoriginal
  File.utime File.atime(f), originaltime, f unless originaltime.nil?
end