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55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
#
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# Copyright (c) 2021-2024 ahriman team.
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#
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# This file is part of ahriman
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# (see https://github.com/arcan1s/ahriman).
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import argparse
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import re
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import textwrap
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class _HelpFormatter(argparse.ArgumentDefaultsHelpFormatter):
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"""
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:class:`argparse.ArgumentDefaultsHelpFormatter` extension which keeps new lines in help messages
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"""
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def __init__(self, prog: str) -> None:
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"""
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Args:
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prog(str): application name
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"""
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argparse.ArgumentDefaultsHelpFormatter.__init__(self, prog, width=120)
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self._whitespace_matcher = re.compile(r"[ \t]+")
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def _fill_text(self, text: str, width: int, indent: str) -> str:
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"""
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implementation of the protected method to format text. Format text, keeping new lines
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Args:
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text(str): text to format
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width(int): maximal text width
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indent(str): indentation string
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Returns:
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str: formatted text
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"""
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text = self._whitespace_matcher.sub(" ", text).strip()
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return "\n".join([
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textwrap.fill(line, width, initial_indent=indent, subsequent_indent=indent)
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for line in text.splitlines()
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])
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