From d53361e50df09ebb57786aa44ba5f7314625ba96 Mon Sep 17 00:00:00 2001
From: flynnjustin24 <flynnjustin40@gmail.com>
Date: Sun, 8 Feb 2026 09:58:51 -0500
Subject: [PATCH] Potential fix for code scanning alert no. 10: Incomplete URL
 substring sanitization

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
---
 source/conf.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/source/conf.py b/source/conf.py
index ccb828b6e..fd75673c2 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -4,6 +4,7 @@
 import os
 import pathlib
 import sys
+from urllib.parse import urlparse
 
 _ROOT = pathlib.Path(__file__).resolve().parent.parent
 sys.path.append(os.fspath(_ROOT))
@@ -12,9 +13,10 @@
 RTD_BUILD = bool(os.getenv("READTHEDOCS"))
 RTD_PR_BUILD = RTD_BUILD and os.getenv("READTHEDOCS_VERSION_TYPE") == "external"
 RTD_URL = os.getenv("READTHEDOCS_CANONICAL_URL")
-RTD_CANONICAL_BUILD = (
-    RTD_BUILD and not RTD_PR_BUILD and "packaging.python.org" in RTD_URL
-)
+RTD_CANONICAL_BUILD = False
+if RTD_BUILD and not RTD_PR_BUILD and RTD_URL:
+    parsed_url = urlparse(RTD_URL)
+    RTD_CANONICAL_BUILD = parsed_url.hostname == "packaging.python.org"
 
 project = "Python Packaging User Guide"