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application: Register preliminary options on a separate argument parser

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We introduce a new `ArgumentParser` for registering the preliminary
options to be inherited by the `Application.option_manager`.  The next
step will be to use the `Application.prelim_arg_parser` for parsing and
handling preliminary options and arguments.

Note that we prevent the preliminary parser from handling `-h/--help`
and defer to that to the primary parser.
This commit is contained in:
Eric N. Vander Weele 2019-10-25 15:01:30 -04:00
parent 1d7558f7da
commit a90200353e
3 changed files with 20 additions and 10 deletions
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5
tests/integration/test_aggregator.py
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@ -1,4 +1,5 @@
"""Test aggregation of config files and command-line options."""
import argparse
import os
import pytest
@ -14,11 +15,13 @@ CLI_SPECIFIED_CONFIG = 'tests/fixtures/config_files/cli-specified.ini'
@pytest.fixture
def optmanager():
"""Create a new OptionManager."""
prelim_parser = argparse.ArgumentParser(add_help=False)
options.register_preliminary_options(prelim_parser)
option_manager = manager.OptionManager(
prog='flake8',
version='3.0.0',
parents=[prelim_parser],
)
options.register_preliminary_options(option_manager)
options.register_default_options(option_manager)
return option_manager