From b2d93673dacbb9426467853d79c929b8a580301e Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Mon, 8 Jul 2024 10:24:19 +0200
Subject: [PATCH] Use ChangeLog date instead of build date

to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.
This date call only works with GNU date and BSD date.

This patch was done while working on reproducible builds for openSUSE, sponsored by the NLnet NGI0 fund.
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 1961f03d..a63c8008 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ else
 	DEB_PACKAGE_NAME := $(BINARY_NAME)
 endif
 
-DATE          := $(shell date -u '+%Y-%m-%d-%H%M UTC')
+DATE          := $(shell date -u -r CHANGES.md '+%Y-%m-%d-%H%M UTC')
 VERSION_FLAGS := -X "main.Version=$(VERSION)" -X "main.BuildTime=$(DATE)"
 ifdef PACKAGE_MANAGER
 	VERSION_FLAGS := $(VERSION_FLAGS) -X "github.com/cloudflare/cloudflared/cmd/cloudflared/updater.BuiltForPackageManager=$(PACKAGE_MANAGER)"