subfolders_by_exif_date

#!/usr/bin/ruby

require 'fileutils'
require 'exifr'

ARGV.each do |file|
  begin
    date = EXIFR::JPEG.new(file).date_time_original
    dir = sprintf('%04d-%02d-%02d', date.year, date.month, date.mday)
    Dir.mkdir(dir) unless File.exist?(dir)
    FileUtils.mv(file, dir)
  rescue => exception
    abort "Error processing #{file}: " + exception.message + "\n" + exception.backtrace.join("\n")
  end
end