From 301c10908e42657c3e6142055aa772adab6a6ef7 Mon Sep 17 00:00:00 2001
From: Rafael Aquini <aquini@redhat.com>
Date: Tue, 16 Jul 2024 08:25:05 -0400
Subject: [PATCH] kbuild: rpm-pkg: introduce a simple changelog section for
 kernel.spec

Fix the following rpmbuild warning:

  $ make srcrpm-pkg
  ...
  RPM build warnings:
      source_date_epoch_from_changelog set but %changelog is missing

Signed-off-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/mkspec | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/scripts/package/mkspec b/scripts/package/mkspec
index 77d25dda37e3..ead54d67a024 100755
--- a/scripts/package/mkspec
+++ b/scripts/package/mkspec
@@ -30,3 +30,26 @@ cat<<EOF
 EOF
 
 cat "${srctree}/scripts/package/kernel.spec"
+
+# collect the user's name and email address for the changelog entry
+if [ "$(command -v git)" ]; then
+	name=$(git config user.name) || true
+	email=$(git config user.email) || true
+fi
+
+if [ ! "${name:+set}" ]; then
+	name=${KBUILD_BUILD_USER:-$(id -nu)}
+fi
+
+if [ ! "${email:+set}" ]; then
+	buildhost=${KBUILD_BUILD_HOST:-$(hostname -f 2>/dev/null || hostname)}
+	builduser=${KBUILD_BUILD_USER:-$(id -nu)}
+	email="${builduser}@${buildhost}"
+fi
+
+cat << EOF
+
+%changelog
+* $(LC_ALL=C; date +'%a %b %d %Y') ${name} <${email}>
+- Custom built Linux kernel.
+EOF