ruby delete files recurcive by regexp

hint.rb

require 'colorize'
#
# параметр - регулярное выражение в кавычках.
#
# пример вызова:
#
# ruby delete_by_regexp.rb '^*.-[a-z0-9]{32}\..+?$'

def listdir(dirname, regexp, indent="")
  dir_print = "#{indent}#{dirname}".green
  dir_printed = false
#  puts "#{Dir.entries(dirname)}".white
  Dir.entries(dirname).sort_by{|x|"#{File.directory?(x) ? '_0' : '_1'}#{x.to_s}"}.each do |file|
    next if file[/^\.+$/]
    if File.directory?("#{dirname}/#{file}")
#      puts indent+"#{dirname}/#{file}".yellow
      listdir("#{dirname}/#{file}", regexp,"  #{indent}")
    else
      if regexp =~ file
        unless dir_printed
          puts dir_print
          dir_printed = true
        end
        puts indent+"delete #{file.to_s.red}"
        system "rm '#{dirname}/#{file}'"
      end
    end
  end
end

puts "'#{ARGV[0]}'"
regexp = Regexp.new(ARGV[0])
puts "'#{regexp.inspect}'"
listdir(Dir.pwd, regexp, "")