Source code for flake8.options.aggregator

"""Aggregation function for CLI specified options and config file options.

This holds the logic that uses the collected and merged config files and
applies the user-specified command-line configuration on top of it.
import logging

from flake8.options import config

LOG = logging.getLogger(__name__)

[docs]def aggregate_options(manager, config_finder, arglist=None, values=None): """Aggregate and merge CLI and config file options. :param flake8.options.manager.OptionManager manager: The instance of the OptionManager that we're presently using. :param flake8.options.config.ConfigFileFinder config_finder: The config file finder to use. :param list arglist: The list of arguments to pass to ``manager.parse_args``. In most cases this will be None so ``parse_args`` uses ``sys.argv``. This is mostly available to make testing easier. :param optparse.Values values: Previously parsed set of parsed options. :returns: Tuple of the parsed options and extra arguments returned by ``manager.parse_args``. :rtype: tuple(optparse.Values, list) """ # Get defaults from the option parser default_values, _ = manager.parse_args([], values=values) # Get original CLI values so we can find additional config file paths and # see if --config was specified. original_values, _ = manager.parse_args(arglist) # Make our new configuration file mergerator config_parser = config.MergedConfigParser( option_manager=manager, config_finder=config_finder, ) # Get the parsed config parsed_config = config_parser.parse(original_values.config, original_values.isolated) # Extend the default ignore value with the extended default ignore list, # registered by plugins. extended_default_ignore = manager.extended_default_ignore.copy() LOG.debug('Extended default ignore list: %s', list(extended_default_ignore)) extended_default_ignore.update(default_values.ignore) default_values.ignore = list(extended_default_ignore) LOG.debug('Merged default ignore list: %s', default_values.ignore) extended_default_select = manager.extended_default_select.copy() LOG.debug('Extended default select list: %s', list(extended_default_select)) default_values.extended_default_select = extended_default_select # Merge values parsed from config onto the default values returned for config_name, value in parsed_config.items(): dest_name = config_name # If the config name is somehow different from the destination name, # fetch the destination name from our Option if not hasattr(default_values, config_name): dest_name = config_parser.config_options[config_name].dest LOG.debug('Overriding default value of (%s) for "%s" with (%s)', getattr(default_values, dest_name, None), dest_name, value) # Override the default values with the config values setattr(default_values, dest_name, value) # Finally parse the command-line options return manager.parse_args(arglist, default_values)