docs/qapidoc: add visit_feature() method

This adds a simple ":feat name: lorem ipsum ..." line to the generated
rST document, so at the moment it's only for "top level" features.

Features not attached directly to a QAPI definition are not currently
handled! This is a small regression over the prior documentation
generator that will be addressed in a future patch.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-49-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/docs/sphinx/qapidoc.py b/docs/sphinx/qapidoc.py
index 2f85fe0bc3..208d7ca144 100644
--- a/docs/sphinx/qapidoc.py
+++ b/docs/sphinx/qapidoc.py
@@ -195,6 +195,15 @@ class Transmogrifier:
         self.add_lines(section.text, section.info)
         self.ensure_blank_line()
 
+    def visit_feature(self, section: QAPIDoc.ArgSection) -> None:
+        # FIXME - ifcond for features is not handled at all yet!
+        # Proposal: decorate the right-hand column with some graphical
+        # element to indicate conditional availability?
+        assert section.text  # Guaranteed by parser.py
+        assert section.member
+
+        self.generate_field("feat", section.member, section.text, section.info)
+
     def visit_errors(self, section: QAPIDoc.Section) -> None:
         # FIXME: the formatting for errors may be inconsistent and may
         # or may not require different newline placement to ensure