src/lib/assembly/vbmeta/gen_expected_descriptor.py

#!/usr/bin/env fuchsia-vendored-python
#
# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import sys
import argparse
import subprocess


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--python_path",
        help="path to the python binary to run avbtool",
        required=True,
    )
    parser.add_argument(
        "--avbtool", help="path to avbtool provided by Android", required=True
    )
    parser.add_argument(
        "--image", help="path to test image to create", required=True
    )
    parser.add_argument(
        "--salt", help="salt to use when adding hash footer", required=True
    )
    parser.add_argument(
        "--output_vbmeta_image",
        help="path to test vbmeta image to output to",
        required=True,
    )
    args = parser.parse_args()

    with open(args.image, "w") as f:
        f.write("0123456789ABCDEF0123456789ABCDEF")

    process = subprocess.run(
        [
            args.python_path,
            args.avbtool,
            "add_hash_footer",
            "--image",
            args.image,
            "--salt",
            args.salt,
            "--partition_name",
            "zircon",
            "--do_not_append_vbmeta_image",
            "--output_vbmeta_image",
            args.output_vbmeta_image,
            "--partition_size",
            # we are not going to add footer into image,
            # so, we do not care about a partition size checking.
            # `partition_size' is a mandatory option, thus let
            # use obviously big number for the partition size to pass
            # verification. 200M should be good enough.
            # TODO(dmitryya@) fix avbtool to do not check partition
            # size if --do_not_append_vbmeta_image is specified.
            "209715200",
        ]
    )
    return process.returncode


if __name__ == "__main__":
    sys.exit(main())