import collections import importlib import inspect import pkgutil import click from ofx_processor import processors ARG_TO_OPTION = { "keep": click.option( "--keep/--no-keep", help="Keep the file after processing it.", default=False, show_default=True, ), "send_method": click.option( "send_method", "-s", "--send", help=( "Send the reconciled amount via the chosen method. " "Accepted methods: sms, email" ), default="", show_default=True, ), "download": click.option( "--download/--no-download", help="Download the file automatically.", default=False, show_default=True, ), "filename": click.option( "-f", "--filename", help="Use specified file.", default="", show_default=True, ), } def discover_processors(cli: click.Group): """ Discover processors. To be discovered, processors must: * Be in the `processors` package. * Declare a Processor class * Declare a main function in the module, outside of the class. The main function must not be a click command, decorators will be added on the fly. The main function must accept two parameters: * filename: str, containing the name of the file to process, as passed on the command line * keep: boolean, whether to keep the file after processing it or not :param cli: The main CLI to add discovered processors to. """ prefix = processors.__name__ + "." for module in pkgutil.iter_modules(processors.__path__, prefix): module = importlib.import_module(module.name) for item in dir(module): if ( item.endswith("Processor") and item != "Processor" and "Base" not in item ): cls = getattr(module, item) assert hasattr( module, "main" ), "There must be a main function in the processor module." assert hasattr( cls, "command_name" ), "You must add a command_name member to your processor class." # Apply default decorators method = getattr(module, "main") method_args = inspect.getfullargspec(method).args for arg in method_args: if arg in ARG_TO_OPTION: method = ARG_TO_OPTION[arg](method) method = click.command(cls.command_name)(method) cli.add_command(method) class OrderedGroup(click.Group): def __init__(self, name=None, commands=None, **attrs): super().__init__(name, commands, **attrs) #: the registered subcommands by their exported names. self.commands = commands or collections.OrderedDict() def list_commands(self, ctx): return self.commands