From 5be013d9d28fdfe7ff0e110d560907db97e32ce9 Mon Sep 17 00:00:00 2001
From: Vincent Cheng <vcheng@debian.org>
Date: Wed, 15 Jan 2025 08:36:52 -0800
Subject: [PATCH] Make build reproducible by reading envvar `SOURCE_DATE_EPOCH`
 if set (#3430)

Co-authored-by: Justin Mayer <entroP@gmail.com>
---
 docs/conf.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index 2cac97e36..283562b99 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,6 +1,7 @@
 import datetime
 import os
 import sys
+import time
 
 if sys.version_info >= (3, 11):
     import tomllib
@@ -30,7 +31,9 @@
 source_suffix = ".rst"
 master_doc = "index"
 project = project_data.get("name").upper()
-year = datetime.datetime.now().date().year
+year = datetime.datetime.fromtimestamp(
+    int(os.environ.get("SOURCE_DATE_EPOCH", time.time())), datetime.timezone.utc
+).year
 copyright = f"2010–{year}"  # noqa: RUF001
 exclude_patterns = ["_build"]
 release = project_data.get("version")