Don't subclass autodoc_traits, since we need to override too much

docs/extensions/serverprocess_documenter.py

@@ -1,14 +1,37 @@
-from autodoc_traits import ConfigurableDocumenter, TraitDocumenter
+"""
+A modified version of https://github.com/jupyterhub/autodoc-traits/tree/1.2.2
+for documenting trait fields that are used to configure another object, but
+where the traitlet cannot be set directly.
+
+This is used to generate the Server Process options documentation:
+https://github.com/jupyterhub/jupyter-server-proxy/blob/main/docs/source/server-process.md
+"""
+
 from sphinx.application import Sphinx
-from sphinx.ext.autodoc import SUPPRESS, ClassDocumenter, ObjectMember
+from sphinx.ext.autodoc import (
+    SUPPRESS,
+    AttributeDocumenter,
+    ClassDocumenter,
+    ObjectMember,
+)
 from sphinx.util.typing import ExtensionMetadata
-from traitlets import Undefined
+from traitlets import MetaHasTraits, TraitType, Undefined
+
 
+class ServerProcessConfigurableDocumenter(ClassDocumenter):
+    """
+    A modified version of autodoc_traits.ConfigurableDocumenter that only documents
+    the traits in this class, not the inherited traits.
+    https://github.com/jupyterhub/autodoc-traits/blob/1.2.2/autodoc_traits.py#L20-L122
+    """
 
-class ServerProcessConfigurableDocumenter(ConfigurableDocumenter):
     objtype = "serverprocessconfigurable"
     directivetype = "class"
-    priority = 100
+    priority = 100  # higher priority than ClassDocumenter's 10
+
+    @classmethod
+    def can_document_member(cls, member, membername, isattr, parent):
+        return isinstance(member, MetaHasTraits)
 
     def get_object_members(self, want_all):
         """
@@ -21,20 +44,27 @@ def get_object_members(self, want_all):
     def should_suppress_directive_header():
         return True
 
-    # Skip over autodoc_traits otherwise it'll prepend c.ServerProcess
-    # to the annotation
     def add_directive_header(self, sig):
         print(f"{sig=}")
         self.options.annotation = SUPPRESS
-        super(ClassDocumenter, self).add_directive_header(sig)
+        super().add_directive_header(sig)
+
 
+class ServerProcessTraitDocumenter(AttributeDocumenter):
+    """
+    A modified version of autodoc_traits.TraitDocumenter that omits the c.ClassName prefix
+    https://github.com/jupyterhub/autodoc-traits/blob/1.2.2/autodoc_traits.py#L125-L203
+    """
 
-class ServerProcessTraitDocumenter(TraitDocumenter):
     objtype = "serverprocesstrait"
     directivetype = "attribute"
     priority = 100  # AttributeDocumenter has 10
     member_order = 0  # AttributeDocumenter has 60
 
+    @classmethod
+    def can_document_member(cls, member, membername, isattr, parent):
+        return isinstance(member, TraitType)
+
     def add_directive_header(self, sig):
         default_value = self.object.default_value
         if default_value is Undefined:
@@ -44,13 +74,11 @@ def add_directive_header(self, sig):
 
         traitlets_type = self.object.__class__.__name__
         self.options.annotation = f"{traitlets_type}({default_value})"
-        # Skip over autodoc_traits otherwise it'll prepend c.ServerProcess
-        # to the annotation
-        super(TraitDocumenter, self).add_directive_header(sig)
+        super().add_directive_header(sig)
 
 
 def setup(app: Sphinx) -> ExtensionMetadata:
-    app.setup_extension("autodoc_traits")
+    app.setup_extension("sphinx.ext.autodoc")
     app.add_autodocumenter(ServerProcessConfigurableDocumenter)
     app.add_autodocumenter(ServerProcessTraitDocumenter)
     return {