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Fix broken "--override" action in Python 3.7 and below.

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This commit is contained in:
Dan Helfman 2020-11-15 13:39:15 -08:00
parent 79bee755ee
commit 8aa7830f0d
1 changed files with 16 additions and 1 deletions
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17
borgmatic/commands/arguments.py
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@ -1,5 +1,5 @@
import collections import collections
from argparse import ArgumentParser from argparse import Action, ArgumentParser
from borgmatic.config import collect from borgmatic.config import collect
@ -102,6 +102,20 @@ def parse_global_arguments(unparsed_arguments, top_level_parser, subparsers):
return top_level_parser.parse_args(remaining_arguments) return top_level_parser.parse_args(remaining_arguments)
class Extend_action(Action):
'''
An argparse action to support Python 3.8's "extend" action in older versions of Python.
'''
def __call__(self, parser, namespace, values, option_string=None):
items = getattr(namespace, self.dest, None)
if items:
items.extend(values)
else:
setattr(namespace, self.dest, list(values))
def parse_arguments(*unparsed_arguments): def parse_arguments(*unparsed_arguments):
''' '''
Given command-line arguments with which this script was invoked, parse the arguments and return Given command-line arguments with which this script was invoked, parse the arguments and return
@ -111,6 +125,7 @@ def parse_arguments(*unparsed_arguments):
unexpanded_config_paths = collect.get_default_config_paths(expand_home=False) unexpanded_config_paths = collect.get_default_config_paths(expand_home=False)
global_parser = ArgumentParser(add_help=False) global_parser = ArgumentParser(add_help=False)
global_parser.register('action', 'extend', Extend_action)
global_group = global_parser.add_argument_group('global arguments') global_group = global_parser.add_argument_group('global arguments')
global_group.add_argument( global_group.add_argument(