Fix :cfg:prop: and :cmake:prop: being confused

This was data accidentally shared between the custom Sphinx domains.

docs/devguide/run_time_configuration.rst

@@ -25,6 +25,8 @@ OpenDDS configuration is concerned with three main areas:
    Each pluggable transport can be configured separately.
    See :ref:`config-transport` for details.
 
+.. _config-store-keys:
+
 **********************
 Configuration Approach
 **********************

docs/sphinx_extensions/config_domain.py

@@ -224,8 +224,14 @@ def transform_content(self, contentnode: addnodes.desc_content) -> None:
         rst = ViewList()
 
         # Config store key
-        key = key_canonicalize(ctx.get(-2, 'sec_name'), ctx.get(-2, 'arguments'), ctx.get_name())
-        rst.append(f'| **Config store key**: ``{key}``', f'{__name__}', 1)
+        try:
+            key = key_canonicalize(
+                ctx.get(-2, 'sec_name'), ctx.get(-2, 'arguments'), ctx.get_name())
+            rst.append(f'| :ref:`Config store key <config-store-keys>`: ``{key}``',
+                f'{__name__}', 1)
+        except Exception as e:
+            e = ValueError(f'Something went wrong with key_canonicalize: {e}')
+            ConfigDomain.logger.warning(e, location=self.get_location())
 
         # :required: flag
         required = 'required' in self.options

docs/sphinx_extensions/custom_domain.py

@@ -187,15 +187,16 @@ class CustomDomain(Domain):
     label = None
     logger = None
 
-    object_types = {
-    }
-    directives = {
-    }
-    roles = {
-    }
-    initial_data: dict[str, dict[tuple[str, str], str]] = {
-        'objects': {},  # fullname -> docname, objtype
-    }
+    def __init_subclass__(cls):
+        cls.object_types = {
+        }
+        cls.directives = {
+        }
+        cls.roles = {
+        }
+        cls.initial_data = {
+            'objects': {},  # fullname -> docname, objtype
+        }
 
     @property
     def objects(self) -> dict[tuple[str, str], tuple[str, str]]: