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#!/usr/bin/env python3
# :Copyright: © 2020, 2022 Günter Milde.
# :License: Released under the terms of the `2-Clause BSD license`_, in short:
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.
# This file is offered as-is, without any warranty.
#
# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
#
# Revision: $Revision: 9107 $
# Date: $Date: 2022-07-06 15:59:57 +0200 (Mi, 06. Jul 2022) $
"""Generic command line interface for the `docutils` package.
See also
https://docs.python.org/3/library/__main__.html#main-py-in-python-packages
"""
import argparse
import locale
import sys
import docutils
from docutils.core import Publisher, publish_cmdline, default_description
class CliSettingsSpec(docutils.SettingsSpec):
"""Runtime settings & command-line options for the generic CLI.
Configurable reader, parser, and writer components.
The "--writer" default will change to 'html' in Docutils 2.0
when 'html' becomes an alias for the current value 'html5'.
"""
settings_spec = (
'Docutils Application Options',
'Reader, writer, and parser settings influence the available options. '
' Example: use `--help --writer=latex` to see LaTeX writer options. ',
# options: ('help text', [<option strings>], {<keyword arguments>})
(('Reader name (currently: "%default").',
['--reader'], {'default': 'standalone', 'metavar': '<reader>'}),
('Parser name (currently: "%default").',
['--parser'], {'default': 'rst', 'metavar': '<parser>'}),
('Writer name (currently: "%default").',
['--writer'], {'default': 'html5', 'metavar': '<writer>'}),
)
)
config_section = 'docutils application'
config_section_dependencies = ('docutils-cli application', # back-compat
'applications')
def main():
"""Generic command line interface for the Docutils Publisher.
"""
locale.setlocale(locale.LC_ALL, '')
description = ('Convert documents into useful formats. '
+ default_description)
# Update component selection from config file(s)
components = Publisher().get_settings(settings_spec=CliSettingsSpec)
# Update component selection from command-line
argparser = argparse.ArgumentParser(add_help=False, allow_abbrev=False)
argparser.add_argument('--reader', default=components.reader)
argparser.add_argument('--parser', default=components.parser)
argparser.add_argument('--writer', default=components.writer)
# other options are parsed in a second pass via `publish_cmdline()`
(args, remainder) = argparser.parse_known_args()
# Ensure the current component selections are shown in help:
CliSettingsSpec.settings_default_overrides = args.__dict__
try:
publish_cmdline(reader_name=args.reader,
parser_name=args.parser,
writer_name=args.writer,
settings_spec=CliSettingsSpec,
description=description,
argv=remainder)
except ImportError as error:
print('%s.' % error, file=sys.stderr)
if '--traceback' in remainder:
raise
else:
print('Use "--traceback" to show details.')
if __name__ == '__main__':
if sys.argv[0].endswith('__main__.py'):
# fix "usage" message
sys.argv[0] = '%s -m docutils' % sys.executable
main()