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93 lines
3.1 KiB
Python
93 lines
3.1 KiB
Python
# Copyright (c) 2019-2021 Artem Bulgakov
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#
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# This file is distributed under the terms of the same license,
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# as the Kivy framework.
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import argparse
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import sys
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class ArgumentParserWithHelp(argparse.ArgumentParser):
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def parse_args(self, args=None, namespace=None):
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# Add help when no arguments specified
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if not args and not len(sys.argv) > 1:
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self.print_help()
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self.exit(1)
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return super().parse_args(args, namespace)
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def error(self, message):
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# Add full help on error
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self.print_help()
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self.exit(2, f"\nError: {message}\n")
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def format_help(self):
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# Add subparsers usage and help to full help text
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formatter = self._get_formatter()
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# Get subparsers
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subparsers_actions = [
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action
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for action in self._actions
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if isinstance(action, argparse._SubParsersAction)
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]
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# Description
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formatter.add_text(self.description)
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# Usage
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formatter.add_usage(
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self.usage,
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self._actions,
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self._mutually_exclusive_groups,
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prefix="Usage:\n",
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)
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# Subparsers usage
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for subparsers_action in subparsers_actions:
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for choice, subparser in subparsers_action.choices.items():
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formatter.add_usage(
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subparser.usage,
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subparser._actions,
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subparser._mutually_exclusive_groups,
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prefix="",
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)
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# Positionals, optionals and user-defined groups
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for action_group in self._action_groups:
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if not any(
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[
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action in subparsers_actions
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for action in action_group._group_actions
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]
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):
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formatter.start_section(action_group.title)
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formatter.add_text(action_group.description)
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formatter.add_arguments(action_group._group_actions)
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formatter.end_section()
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else:
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# Process subparsers differently
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# Just show list of choices
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formatter.start_section(action_group.title)
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# formatter.add_text(action_group.description)
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for action in action_group._group_actions:
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for choice in action.choices:
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formatter.add_text(choice)
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formatter.end_section()
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# Subparsers help
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for subparsers_action in subparsers_actions:
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for choice, subparser in subparsers_action.choices.items():
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formatter.start_section(choice)
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for action_group in subparser._action_groups:
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formatter.start_section(action_group.title)
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formatter.add_text(action_group.description)
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formatter.add_arguments(action_group._group_actions)
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formatter.end_section()
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formatter.end_section()
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# Epilog
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formatter.add_text(self.epilog)
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# Determine help from format above
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return formatter.format_help()
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