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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main(graph, *args):
 """ Entry point for invoking Alembic's `CommandLine`. Alembic's CLI defines its own argument parsing and command invocation; we want to use these directly but define configuration our own way. This function takes the behavior of `CommandLine.main()` and reinterprets it with our patching. :param graph: an initialized object graph :param migration_dir: the path to the migrations directory """

    migrations_dir = get_migrations_dir(graph)

    cli = CommandLine()
    options = cli.parser.parse_args(args if args else argv[1:])
    if not hasattr(options, "cmd"):
        cli.parser.error("too few arguments")
    if options.cmd[0].__name__ == "init":
        cli.parser.error("Alembic 'init' command should not be used in the microcosm!")

    with patch_script_directory(graph) as temporary_dir:
        config = make_alembic_config(temporary_dir, migrations_dir)
        cli.run_cmd(config, options)