python-peps/pep_sphinx_extensions/__init__.py

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"""Sphinx extensions for performant PEP processing"""
from __future__ import annotations
from typing import TYPE_CHECKING
from docutils import nodes
from docutils.parsers.rst import states
from docutils.writers.html5_polyglot import HTMLTranslator
from sphinx import environment
from pep_sphinx_extensions.pep_processor.html import pep_html_builder
from pep_sphinx_extensions.pep_processor.html import pep_html_translator
from pep_sphinx_extensions.pep_processor.parsing import pep_parser
from pep_sphinx_extensions.pep_processor.parsing import pep_role
from pep_sphinx_extensions.pep_zero_generator.pep_index_generator import create_pep_zero
if TYPE_CHECKING:
from sphinx.application import Sphinx
# Monkeypatch sphinx.environment.default_settings as Sphinx doesn't allow custom settings or Readers
# This disables reading configuration from docutils.conf so as not to affect pep2html.py
environment.default_settings["_disable_config"] = True
def _depart_maths():
pass # No-op callable for the type checker
def _update_config_for_builder(app: Sphinx):
if app.builder.name == "dirhtml":
app.env.settings["pep_url"] = "../pep-{:0>4}"
def setup(app: Sphinx) -> dict[str, bool]:
"""Initialize Sphinx extension."""
environment.default_settings["pep_url"] = "pep-{:0>4}.html"
environment.default_settings["halt_level"] = 2 # Fail on Docutils warning
# Register plugin logic
app.add_builder(pep_html_builder.FileBuilder, override=True)
app.add_builder(pep_html_builder.DirectoryBuilder, override=True)
app.add_source_parser(pep_parser.PEPParser) # Add PEP transforms
app.set_translator("html", pep_html_translator.PEPTranslator) # Docutils Node Visitor overrides (html builder)
app.set_translator("dirhtml", pep_html_translator.PEPTranslator) # Docutils Node Visitor overrides (dirhtml builder)
app.add_role("pep", pep_role.PEPRole(), override=True) # Transform PEP references to links
# Register event callbacks
app.connect("builder-inited", _update_config_for_builder) # Update configuration values for builder used
app.connect("env-before-read-docs", create_pep_zero) # PEP 0 hook
# Mathematics rendering
inline_maths = HTMLTranslator.visit_math, _depart_maths
block_maths = HTMLTranslator.visit_math_block, _depart_maths
app.add_html_math_renderer("maths_to_html", inline_maths, block_maths) # Render maths to HTML
# Parallel safety: https://www.sphinx-doc.org/en/master/extdev/index.html#extension-metadata
return {"parallel_read_safe": True, "parallel_write_safe": True}