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Support docutils-0.18: allow PreBibliographic nodes before docinfo

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Since 0.18, `meta` directive inserts meta node into the top of the
document.  It confuses MetadataCollector.

This allows doctree contains PreBibliographic nodes just before docinfo
node.
This commit is contained in:
Takeshi KOMIYA 2021-10-11 01:23:29 +09:00
parent 3b8456f74c
commit 8118f979dc
1 changed files with 6 additions and 3 deletions
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9
sphinx/environment/collectors/metadata.py
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@ -33,9 +33,12 @@ class MetadataCollector(EnvironmentCollector):
Keep processing minimal -- just return what docutils says.
"""
if len(doctree) > 0 and isinstance(doctree[0], nodes.docinfo):
index = doctree.first_child_not_matching_class(nodes.PreBibliographic)
if index is None:
return
elif isinstance(doctree[index], nodes.docinfo):
md = app.env.metadata[app.env.docname]
for node in doctree[0]:
for node in doctree[index]: # type: ignore
# nodes are multiply inherited...
if isinstance(node, nodes.authors):
authors = cast(List[nodes.author], node)
@ -58,7 +61,7 @@ class MetadataCollector(EnvironmentCollector):
value = 0
md[name] = value
doctree.pop(0)
doctree.pop(index)
def setup(app: Sphinx) -> Dict[str, Any]: