From 43235dd862727e594c0df36224648b046f134b59 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Mon, 25 Feb 2019 03:41:08 +0100
Subject: [PATCH] Improve reproducibility of initramfs

Use SOURCE_DATE_EPOCH variable
---
 kernel.spec.in | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel.spec.in b/kernel.spec.in
index 59d1289..50e0b77 100644
--- a/kernel.spec.in
+++ b/kernel.spec.in
@@ -372,9 +372,12 @@ if [ -z "$modules_dep" ]; then
     depmod -F %buildroot/boot/System.map-%kernelrelease \
         -b "$tmpdir" -a %kernelrelease || exit 1
     pushd "$tmpdir"
+    if [ -n "$SOURCE_DATE_EPOCH" ]; then
+        find . -exec touch --no-dereferece --date="@${SOURCE_DATE_EPOCH}" {} +
+    fi
     find . -print0 | sort -z \
-      | cpio --null -R 0:0 -H newc -o --quiet \
-      | gzip > %buildroot/%vm_install_dir/initramfs || exit 1
+      | cpio --null -R 0:0 -H newc -o --reproducible --quiet \
+      | gzip -n > %buildroot/%vm_install_dir/initramfs || exit 1
     popd
 fi