Merge "releasetools: Pack updatable images into IMAGES/ for A/B update." am: 128466ce

  banner("cache")

  AddCache(output_zip)

  # For devices using A/B update, copy over images from RADIO/ to IMAGES/ and

  # make sure we have all the needed images ready under IMAGES/.

  ab_partitions = os.path.join(OPTIONS.input_tmp, "META", "ab_partitions.txt")

  if os.path.exists(ab_partitions):

    with open(ab_partitions, 'r') as f:

      lines = f.readlines()

    for line in lines:

      img_name = line.strip() + ".img"

      img_radio_path = os.path.join(OPTIONS.input_tmp, "RADIO", img_name)

      if os.path.exists(img_radio_path):

        common.ZipWrite(output_zip, img_radio_path,

                        os.path.join("IMAGES", img_name))

      # Zip spec says: All slashes MUST be forward slashes.

      img_path = 'IMAGES/' + img_name

      assert img_path in output_zip.namelist(), "cannot find " + img_name

  common.ZipClose(output_zip)

def main(argv):