qemu/docs/sphinx/compat.py
John Snow abf6bedc38 docs/sphinx: add compat.py module and nested_parse helper
Create a compat module that handles sphinx cross-version compatibility
issues. For the inaugural function, add a nested_parse_with_titles()
helper that handles differences in line number tracking for nested
directive body parsing.

Spoilers: there are more cross-version hacks to come throughout the
series.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-5-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-03-11 10:07:02 +01:00

35 lines
1.1 KiB
Python

"""
Sphinx cross-version compatibility goop
"""
from docutils.nodes import Element
from sphinx.util import nodes
from sphinx.util.docutils import SphinxDirective, switch_source_input
def nested_parse_with_titles(
directive: SphinxDirective, content_node: Element
) -> None:
"""
This helper preserves error parsing context across sphinx versions.
"""
# necessary so that the child nodes get the right source/line set
content_node.document = directive.state.document
try:
# Modern sphinx (6.2.0+) supports proper offsetting for
# nested parse error context management
nodes.nested_parse_with_titles(
directive.state,
directive.content,
content_node,
content_offset=directive.content_offset,
)
except TypeError:
# No content_offset argument. Fall back to SSI method.
with switch_source_input(directive.state, directive.content):
nodes.nested_parse_with_titles(
directive.state, directive.content, content_node
)