From a14e3acf78fc6925199772c06156e6c1f084a3f2 Mon Sep 17 00:00:00 2001
From: Koichi Akabe <vbkaisetsu@gmail.com>
Date: Sat, 18 Apr 2026 22:20:04 +0900
Subject: [PATCH] Set `html_theme` only when building docs on local machine

---
 docs/source/conf.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/docs/source/conf.py b/docs/source/conf.py
index 7f4b60b..37d222f 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,5 +1,7 @@
+import os
+
 project = 'python-daachorse'
-copyright = '2022, daac-tools'
+copyright = '2026, daac-tools'
 author = 'Koichi Akabe'
 
 extensions = [
@@ -8,4 +10,6 @@
 
 exclude_patterns = []
 
-html_theme = 'sphinx_rtd_theme'
+on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+if not on_rtd:
+    html_theme = 'sphinx_rtd_theme'