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"""To publish HTML docs at GitHub Pages, create .nojekyll file."""
from __future__ import annotations
import contextlib
import os
import urllib.parse
from typing import TYPE_CHECKING
import sphinx
if TYPE_CHECKING:
from sphinx.application import Sphinx
from sphinx.environment import BuildEnvironment
from sphinx.util.typing import ExtensionMetadata
def _get_domain_from_url(url: str) -> str:
"""Get the domain from a URL."""
return url and urllib.parse.urlparse(url).hostname or ''
def create_nojekyll_and_cname(app: Sphinx, env: BuildEnvironment) -> None:
"""Manage the ``.nojekyll`` and ``CNAME`` files for GitHub Pages.
For HTML-format builders (e.g. 'html', 'dirhtml') we unconditionally create
the ``.nojekyll`` file to signal that GitHub Pages should not run Jekyll
processing.
If the :confval:`html_baseurl` option is set, we also create a CNAME file
with the domain from ``html_baseurl``, so long as it is not a ``github.io``
domain.
If this extension is loaded and the domain in ``html_baseurl`` no longer
requires a CNAME file, we remove any existing ``CNAME`` files from the
output directory.
"""
if app.builder.format != 'html':
return
app.builder.outdir.joinpath('.nojekyll').touch()
cname_path = os.path.join(app.builder.outdir, 'CNAME')
domain = _get_domain_from_url(app.config.html_baseurl)
# Filter out GitHub Pages domains, as they do not require CNAME files.
if domain and not domain.endswith(".github.io"):
with open(cname_path, 'w', encoding="utf-8") as f:
# NOTE: don't write a trailing newline. The `CNAME` file that's
# auto-generated by the GitHub UI doesn't have one.
f.write(domain)
else:
with contextlib.suppress(FileNotFoundError):
os.unlink(cname_path)
def setup(app: Sphinx) -> ExtensionMetadata:
app.connect('env-updated', create_nojekyll_and_cname)
return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
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