def get_repo_push_url(args):
    """Return the fully expanded push url for this repo or None.

    :args: the namespace returned from the argparse parser
    :returns: string url to push the repo, or None

    """
    url = None
    if args.repo_push_url_format:
        url = args.repo_push_url_format.format(args.repo_url)
    return url