From: Andrey Rakhmatullin <wrar@debian.org>
Date: Sat, 9 Aug 2025 15:35:40 +0500
Subject: Use local intersphinx files.

---
 doc/conf.py | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/doc/conf.py b/doc/conf.py
index aa83ac8..edd41c9 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -249,7 +249,25 @@ latex_documents = [
 # (source start file, name, description, authors, manual section).
 man_pages = [("index", "pyopenssl", "pyOpenSSL Documentation", [authors], 1)]
 
-intersphinx_mapping = {
-    "python": ("https://docs.python.org/3", None),
-    "cryptography": ("https://cryptography.io/en/latest/", 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(
+        "cryptography",
+        "https://cryptography.io/en/latest/",
+        "/usr/share/doc/python-cryptography-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "python",
+        "https://docs.python.org/3",
+        "/usr/share/doc/python%d.%d/html/objects.inv" % sys.version_info[:2],
+    )
+)