Ruby script for recursively renaming current directory's files and folders to fix Windows invalid characters: /\?%*|"<>

jenengi.rb

#!/usr/bin/env ruby

pwd = Dir.pwd
puts pwd + "\n#{"="*pwd.length}"

entries = Dir.glob(pwd+"/**/*", File::FNM_DOTMATCH)
renamed = 0

entries.reverse.each do |file|
  unless File.basename(file) =~ /^(\.\.|\.)\z/
    new_name = File.dirname(file)+"/"+File.basename(file).gsub(/[\/\\?%*:|"<>]/, "_")
    if file != new_name
      puts "#{file.gsub(pwd, "")} => #{new_name.gsub(pwd,"")}"
      File.rename file, new_name
      renamed += 1
    end
  end
end

puts "\nRenamed #{renamed} of #{entries.size-2}."