buildHomeAssistantComponent: catch invalid requirements

import sys

import importlib_metadata

from packaging.requirements import Requirement

from packaging.requirements import InvalidRequirement, Requirement

def error(msg: str) -> None:

def error(msg: str, ret: bool = False) -> None:

    print(f"  - {msg}", file=sys.stderr)

    return False

    return ret

def check_requirement(req: str):

    # https://packaging.pypa.io/en/stable/requirements.html

    try:

        requirement = Requirement(req)

    except InvalidRequirement:

        return error(f"{req} could not be parsed", ret=True)

    try:

        version = importlib_metadata.distribution(requirement.name).version

    except importlib_metadata.PackageNotFoundError: