From: Michael Fladischer <fladi@debian.org>
Date: Mon, 20 Nov 2023 22:18:15 +0000
Subject: Use local objects.inv in intersphinx mapping.

---
 docs/conf.py | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

diff --git a/docs/conf.py b/docs/conf.py
index a9fb6ad..86ff36a 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -5,6 +5,7 @@
 import os
 import pathlib
 import sys
+import django
 
 current_dir = pathlib.Path(__file__).parent
 # Find current settings module for doctests.
@@ -41,10 +42,23 @@ html_static_path = []
 
 # -- Options for extensions --------------------------------------------------
 
-intersphinx_mapping = {
-    "django": (
-        "https://docs.djangoproject.com/en/dev/",
-        "https://docs.djangoproject.com/en/dev/_objects/",
-    ),
-    "python": ("https://docs.python.org/3/", None),
-}
+def check_object_path(key, url, path):
+    if os.path.isfile(path):
+        return {key: (url, path)}
+    return {}
+
+intersphinx_mapping = {}
+intersphinx_mapping.update(
+    check_object_path(
+        'python',
+        'https://docs.python.org/{v.major}.{v.minor}/'.format(v=sys.version_info),
+        '/usr/share/doc/python{v.major}.{v.minor}/html/objects.inv'.format(v=sys.version_info)
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        'django',
+        'https://docs.djangoproject.com/en/' + '.'.join((str(c) for c in django.VERSION[:2])) + '/_objects/',
+        '/usr/share/doc/python-django-doc/html/objects.inv'
+    )
+)