Merge "Recurse into directories to find fonts."

  os.chdir(cwd)

  input_fonts = list()

  for src_dir in src_dirs:

    for filename in os.listdir(src_dir):

      if os.path.isdir(os.path.join(src_dir, filename)):

        continue

      if not os.path.splitext(filename)[1].lower() == '.ttf':

        shutil.copy(os.path.join(src_dir, filename), dest_dir)

        continue

      input_fonts.append(os.path.join(src_dir, filename))

    for dirname, dirnames, filenames in os.walk(src_dir):

      for filename in filenames:

          input_path = os.path.join(dirname, filename)

          extension = os.path.splitext(filename)[1].lower()

          if (extension == '.ttf'):

            input_fonts.append(input_path)

          elif (extension == '.xml'):

            shutil.copy(input_path, dest_dir)

      if '.git' in dirnames:

          # don't go into any .git directories.

          dirnames.remove('.git')

  # Create as many threads as the number of CPUs

  pool = Pool(processes=None)

  pool.map(convert_font, input_fonts)