57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
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#! /usr/bin/env python3
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# :Copyright: © 2022 Günter Milde.
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# :License: Released under the terms of the `2-Clause BSD license`_, in short:
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#
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved.
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# This file is offered as-is, without any warranty.
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#
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# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
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#
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# Revision: $Revision: 9048 $
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# Date: $Date: 2022-03-29 23:50:15 +0200 (Di, 29. Mär 2022) $
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"""
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An interface for parsing CommonMark input.
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Select a locally installed parser from the following 3rd-party
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parser packages:
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:pycmark: https://pypi.org/project/pycmark/
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:myst: https://pypi.org/project/pycmark/
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:recommonmark: https://pypi.org/project/pycmark/ (unmaintained, deprecated)
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The first parser class that can be successfully imported is mapped to
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`commonmark_wrapper.Parser`.
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This module is provisional:
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the API is not settled and may change with any minor Docutils version.
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"""
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import docutils.parsers
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commonmark_parser_names = ('pycmark', 'myst', 'recommonmark')
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"""Names of compatible drop-in CommonMark parsers"""
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Parser = None
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parser_name = ''
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for name in commonmark_parser_names:
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try:
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Parser = docutils.parsers.get_parser_class(name)
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except ImportError:
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continue
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parser_name = name
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break
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if Parser is None:
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raise ImportError(
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'Parsing "CommonMark" requires one of the packages\n'
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f'{commonmark_parser_names} available at https://pypi.org')
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if parser_name == 'myst':
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if not Parser.settings_defaults:
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Parser.settings_defaults = {}
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Parser.settings_defaults['myst_commonmark_only'] = True
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