def main()

in python/pip_install/parse_requirements_to_bzl/extract_single_wheel/__init__.py [0:0]

• 53 lines of code
• 7 McCabe index (conditional complexity)

def main() -> None:
    parser = argparse.ArgumentParser(
        description="Build and/or fetch a single wheel based on the requirement passed in"
    )
    parser.add_argument(
        "--requirement",
        action="store",
        required=True,
        help="A single PEP508 requirement specifier string.",
    )
    parser.add_argument(
        "--annotation",
        type=annotation_from_str_path,
        help="A json encoded file containing annotations for rendered packages.",
    )
    arguments.parse_common_args(parser)
    args = parser.parse_args()
    deserialized_args = dict(vars(args))
    arguments.deserialize_structured_args(deserialized_args)

    configure_reproducible_wheels()

    pip_args = (
        [sys.executable, "-m", "pip"]
        + (["--isolated"] if args.isolated else [])
        + ["wheel", "--no-deps"]
        + deserialized_args["extra_pip_args"]
    )

    requirement_file = NamedTemporaryFile(mode="wb", delete=False)
    try:
        requirement_file.write(args.requirement.encode("utf-8"))
        requirement_file.flush()
        # Close the file so pip is allowed to read it when running on Windows.
        # For more information, see: https://bugs.python.org/issue14243
        requirement_file.close()
        # Requirement specific args like --hash can only be passed in a requirements file,
        # so write our single requirement into a temp file in case it has any of those flags.
        pip_args.extend(["-r", requirement_file.name])

        env = os.environ.copy()
        env.update(deserialized_args["environment"])
        # Assumes any errors are logged by pip so do nothing. This command will fail if pip fails
        subprocess.run(pip_args, check=True, env=env)
    finally:
        try:
            os.unlink(requirement_file.name)
        except OSError as e:
            if e.errno != errno.ENOENT:
                raise

    name, extras_for_pkg = requirements._parse_requirement_for_extra(args.requirement)
    extras = {name: extras_for_pkg} if extras_for_pkg and name else dict()

    whl = next(iter(glob.glob("*.whl")))
    bazel.extract_wheel(
        wheel_file=whl,
        extras=extras,
        pip_data_exclude=deserialized_args["pip_data_exclude"],
        enable_implicit_namespace_pkgs=args.enable_implicit_namespace_pkgs,
        incremental=True,
        repo_prefix=args.repo_prefix,
        annotation=args.annotation,
    )