Merge "releasetools: Fix the diff_worker progress report." am: e5b2ff2a am: 81c01a9a

      diff_total = len(diff_queue)

      patches = [None] * diff_total

      if sys.stdout.isatty():

        global diff_done

        diff_done = 0

      # Using multiprocessing doesn't give additional benefits, due to the

      # pattern of the code. The diffing work is done by subprocess.call, which

          with lock:

            patches[patch_index] = (xf_index, patch)

            if sys.stdout.isatty():

              progress = len(patches) * 100 / diff_total

              global diff_done

              diff_done += 1

              progress = diff_done * 100 / diff_total

              # '\033[K' is to clear to EOL.

              print(' [%d%%] %s\033[K' % (progress, xf.tgt_name), end='\r')

              sys.stdout.flush()