Fix inventory base_url handling

src/mkdocstrings_handlers/python/_internal/config.py

@@ -971,7 +971,7 @@ class Inventory:
         ),
     ]
 
-    base: Annotated[
+    base_url: Annotated[
         str | None,
         _Field(
             parent="inventories",
@@ -989,7 +989,7 @@ class Inventory:
 
     @property
     def _config(self) -> dict[str, Any]:
-        return {"base": self.base, "domains": self.domains}
+        return {"base_url": self.base_url, "domains": self.domains}
 
 
 # YORE: EOL 3.9: Replace `**_dataclass_options` with `frozen=True, kw_only=True` within line.

tests/test_handler.py

@@ -4,11 +4,14 @@
 
 import os
 import sys
+from dataclasses import replace
 from glob import glob
+from io import BytesIO
 from pathlib import Path
 from textwrap import dedent
 from typing import TYPE_CHECKING
 
+import mkdocstrings
 import pytest
 from griffe import (
     Docstring,
@@ -20,7 +23,7 @@
 )
 from mkdocstrings import CollectionError
 
-from mkdocstrings_handlers.python import PythonConfig, PythonHandler, PythonOptions
+from mkdocstrings_handlers.python import Inventory, PythonConfig, PythonHandler, PythonOptions
 
 if TYPE_CHECKING:
     from mkdocstrings import MkdocstringsPlugin
@@ -298,3 +301,33 @@ class B(A): ...
             module,
             handler.get_options({"inherited_members": True}),
         )
+
+
+def test_specifying_inventory_base_url(handler: PythonHandler) -> None:
+    """Assert that the handler renders inventory URLs using the specified base_url."""
+    # Update handler config to include an inventory with a base URL
+    base_url = "https://docs.com/my_library"
+    inventory = Inventory(url="https://example.com/objects.inv", base_url=base_url)
+    handler.config = replace(handler.config, inventories=[inventory])
+
+    # Mock inventory bytes
+    item_name = "my_library.my_module.MyClass"
+    mocked_inventory = mkdocstrings.Inventory()
+    mocked_inventory.register(
+        name=item_name,
+        domain="py",
+        role="class",
+        uri=f"api-reference/#{item_name}",
+        dispname=item_name,
+    )
+    mocked_bytes = BytesIO(mocked_inventory.format_sphinx())
+
+    # Get inventory URL and config
+    url, config = handler.get_inventory_urls()[0]
+
+    # Load the mocked inventory
+    _, item_url = next(handler.load_inventory(mocked_bytes, url, **config))
+
+    # Assert the URL is based on the provided base URL
+    msg = "Expected inventory URL to start with base_url"
+    assert item_url.startswith(base_url), msg