[PATCH v2 17/23] docs/qapidoc: prepare to record entity being transmogrified

[John Snow]

Prepare to keep a record of which entity we're working on documenting
for the purposes of being able to change certain generative features
conditionally and create stronger assertions.

If you find yourself asking: "Wait, but where does the current entity
actually get recorded?!", you're right! That part comes with the
visit_entity() implementation, which gets added later.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 docs/sphinx/qapidoc.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/sphinx/qapidoc.py b/docs/sphinx/qapidoc.py
index e9af072c5a6..a4dbfa3b3dd 100644
--- a/docs/sphinx/qapidoc.py
+++ b/docs/sphinx/qapidoc.py
@@ -74,9 +74,15 @@ def dedent(text: str) -> str:
 
 class Transmogrifier:
     def __init__(self, schema):
+        self._curr_ent = None
         self._result = StringList()
         self.indent = 0
 
+    @property
+    def entity(self) -> QAPISchemaEntity:
+        assert self._curr_ent is not None
+        return self._curr_ent
+
     # General-purpose rST generation functions
 
     def get_indent(self) -> str:
-- 
2.47.1