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"""
    sphinx.builders.htmlhelp
    ~~~~~~~~~~~~~~~~~~~~~~~~

    Build HTML help support files.
    Parts adapted from Python's Doc/tools/prechm.py.

    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import warnings
from typing import Any, Dict

from sphinxcontrib.htmlhelp import (HTMLHelpBuilder, chm_htmlescape, chm_locales,
                                    default_htmlhelp_basename)

from sphinx.application import Sphinx
from sphinx.deprecation import RemovedInSphinx40Warning, deprecated_alias

deprecated_alias('sphinx.builders.htmlhelp',
                 {
                     'chm_locales': chm_locales,
                     'chm_htmlescape': chm_htmlescape,
                     'HTMLHelpBuilder':  HTMLHelpBuilder,
                     'default_htmlhelp_basename': default_htmlhelp_basename,
                 },
                 RemovedInSphinx40Warning,
                 {
                     'chm_locales': 'sphinxcontrib.htmlhelp.chm_locales',
                     'chm_htmlescape': 'sphinxcontrib.htmlhelp.chm_htmlescape',
                     'HTMLHelpBuilder': 'sphinxcontrib.htmlhelp.HTMLHelpBuilder',
                     'default_htmlhelp_basename':
                     'sphinxcontrib.htmlhelp.default_htmlhelp_basename',
                 })


def setup(app: Sphinx) -> Dict[str, Any]:
    warnings.warn('sphinx.builders.htmlhelp has been moved to sphinxcontrib-htmlhelp.',
                  RemovedInSphinx40Warning, stacklevel=2)
    app.setup_extension('sphinxcontrib.htmlhelp')

    return {
        'version': 'builtin',
        'parallel_read_safe': True,
        'parallel_write_safe': True,
    }