incrementing numbers in all files within a directory

increment_numbers_in_filename

require 'find'
require 'fileutils'

Find.find(ENV["HOME"] + "/Movies/backup") do |path|
  if FileTest.file? path
    if path =~ /(\d+)/
      old_num = $1
      new_num = old_num.to_i + 1
      new_path = path.gsub( old_num, new_num.to_s )
      puts "renaming #{path} to #{new_path}\n"
      FileUtils.mv(path, new_path)
    end
  end
end