recursive rename (convert) files in a directory

recursive_rename_files.rb

#!/usr/bin/env ruby

require 'optparse'

def parse_command_line
  options = {}

  optparse = OptionParser.new do |opts|
    opts.banner = "Usage: #{__FILE__} [options] encoding path\n" +
    "Encoding like UTF8-MAC or ISO-8859-2"

    options[:inspect] = false
    opts.on( '-i', '--inspecting', 'Do not convert, only show what will be done' ) do
      options[:inspect] = true
    end

    opts.on( '-h', '--help', 'Display this screen' ) do
      puts opts
      exit
    end
  end

  optparse.parse!

  if ARGV[1].nil?
    puts optparse.to_s
    exit
  end

  unless Dir.exists?(ARGV[1])
    puts "Invalid path given: " + ARGV[0]
    exit
  end

  options[:encoding]= ARGV[0]
  options[:path]= ARGV[1].chomp('/')+'/'


  return options
end

options = parse_command_line

Dir.glob(options[:path] + "**/*").sort{|x| x.size}.each do |name|
  parts = name.split('/')
  original = parts[-1]
  modified = parts[-1].encode('UTF-8',options[:encoding])
  newname = (parts[0..-2] + [modified]).join('/')
  if name != newname
    if options[:inspect]
      puts original + " -> " + modified
    else
      File.rename(name, newname)
    end
  end
end