def deserialize_untyped()

in antlir/compiler/procfs_serde.py [0:0]

• 25 lines of code
• 10 McCabe index (conditional complexity)

def deserialize_untyped(path: Path, path_with_ext: str) -> Any:
    # `isdir` and `isfile` follow symbolic links so use `normalized_subpath`
    # to prevent the use of symlinks that take us outside the base path.
    if os.path.isdir(path.normalized_subpath(path_with_ext)):
        return {
            k: deserialize_untyped(path, os.path.join(path_with_ext, k))
            for k in os.listdir(path.normalized_subpath(path_with_ext).decode())
        }
    elif os.path.isfile(path.normalized_subpath(path_with_ext)):
        with open(path.normalized_subpath(path_with_ext), "rb") as f:
            s = f.read()

        _, ext = os.path.splitext(path_with_ext)
        if ext == ".bin":
            return s

        # All other extensions had a trailing newline appended.
        if not s.endswith(b"\n"):
            raise AssertionError(
                f"{path_with_ext} must have had a trailing newline, got {s}"
            )
        s = s[:-1]

        if ext == ".image_path" or ext == ".host_path":
            return s
        elif ext == "":
            return s.decode()
        else:
            raise AssertionError(f"Unsupported extension {path_with_ext}")
    else:
        raise AssertionError(f"{path_with_ext} is neither a file nor a dir")