From 7ce0c8a4fcf35df492e797ed7bd98f0ea63b622b Mon Sep 17 00:00:00 2001
From: Ingvar Stepanyan <rreverser@google.com>
Date: Tue, 19 Jan 2021 13:21:00 +0000
Subject: [PATCH] Make MozJPEG builds reproducible

I was wondering why MozJPEG produces different Wasm binaries even when nothing is changed.

After looking at the binary diffs, I think I have figured & fixed the reason.
---
 codecs/mozjpeg/Makefile                  |   5 ++++-
 codecs/mozjpeg/enc/mozjpeg_enc.wasm      | Bin 236148 -> 236147 bytes
 codecs/mozjpeg/enc/mozjpeg_node_enc.wasm | Bin 236148 -> 236147 bytes
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/codecs/mozjpeg/Makefile b/codecs/mozjpeg/Makefile
index 65179d79..bbdd7ade 100644
--- a/codecs/mozjpeg/Makefile
+++ b/codecs/mozjpeg/Makefile
@@ -46,7 +46,10 @@ $(CODEC_DIR)/Makefile: $(CODEC_DIR)/configure
 		--without-turbojpeg \
 		--without-simd \
 		--without-arith-enc \
-		--without-arith-dec
+		--without-arith-dec \
+		--with-build-date=squoosh
+		# ^ If not provided with a dummy value, MozJPEG includes a build date in the
+		# binary as part of the version string, making binaries different each time.
 
 $(CODEC_DIR)/configure: $(CODEC_DIR)/configure.ac
 	cd $(CODEC_DIR) && autoreconf -iv
diff --git a/codecs/mozjpeg/enc/mozjpeg_enc.wasm b/codecs/mozjpeg/enc/mozjpeg_enc.wasm
index e2f0ea74fdab9c139660e4b87fd5759ae881dc94..6dc8b5b6f0fb01905cc7748fefe6e551c322aa8c 100755
GIT binary patch
delta 86
zcmV-c0IC1<v<~yM4zM#X0hW_AFFFgH`~V;Z8#V$UL7kI%FEIh4ldCT?0jh)FFNfbR
s0k_{T0`?yPo43|a0=pvt(6^Fv0xlK@b8&TVZ*ype$cX~C$cY225Se`;p#T5?

delta 87
zcmV-d0I2`-v<~#N4zM#X0hg0BFFFgI`~V;Z8#V$UL7tO&FEIh5ldCT?0jq=GFNfbR
t0k_{T0`?yPoVV6b0=pvt(YKOw0xlK^GB7eRFflPShsTKmx5tSCtPr3ZARqt$

diff --git a/codecs/mozjpeg/enc/mozjpeg_node_enc.wasm b/codecs/mozjpeg/enc/mozjpeg_node_enc.wasm
index e2f0ea74fdab9c139660e4b87fd5759ae881dc94..6dc8b5b6f0fb01905cc7748fefe6e551c322aa8c 100755
GIT binary patch
delta 86
zcmV-c0IC1<v<~yM4zM#X0hW_AFFFgH`~V;Z8#V$UL7kI%FEIh4ldCT?0jh)FFNfbR
s0k_{T0`?yPo43|a0=pvt(6^Fv0xlK@b8&TVZ*ype$cX~C$cY225Se`;p#T5?

delta 87
zcmV-d0I2`-v<~#N4zM#X0hg0BFFFgI`~V;Z8#V$UL7tO&FEIh5ldCT?0jq=GFNfbR
t0k_{T0`?yPoVV6b0=pvt(YKOw0xlK^GB7eRFflPShsTKmx5tSCtPr3ZARqt$