Path Iterator In Ruby

PathIterator.rb

def list_files(path, level)
    if File.directory?(path)
        Dir.foreach(path) do |item|
            if item != '.' && item != '..' && item != '$RECYCLE.BIN' && item != 'System Volume Information'
                item = File.join(path, item)
                size = File.size(item)

                if File.directory?(item)
                    print("#{"\t" * level}#{item}\n")

                    begin
                        list_files(item, level + 1)
                    rescue
                    end
                else
                    print("#{"\t" * level}#{item} (#{size})\n")
                end
            end
        end
    end
end

if __FILE__ == $0
    ARGV[0] = ARGV[0] == nil ? 'C:\ruby192': ARGV[0]
    list_files(ARGV[0], 0)
end