From 1c3dbc95489862892e2ea11b8776afc5253444ae Mon Sep 17 00:00:00 2001
From: "Brian C. Lane" <bcl@redhat.com>
Date: Wed, 5 Jun 2024 15:08:07 -0700
Subject: [PATCH] Makefile: Add PREV support for clog

When making a new release that contains commits that have already been
merged onto c10s (but not build) running make release would result in an
empty changelog.

This adds the PREV environmental variable so that the hash of the
previous release can be used as the reference for creating the clog.

eg. PREV=ACTUALHASH make release

Where ACTUALHASH is the git hash of the commit used to make the previous
release. Usually this is one commit before the first commit you want to
include in this build.

Related: RHEL-40021
---
 Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index dc24469..9e5497c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@ NAME=lorax-templates-rhel
 RHELVER=10.0
 RHPKG=centpkg --release=c10s
 
+# Previous release, override this when new commits are already on c10s
+PREV ?= origin/c10s
+
 # git user.email and user.name must be setup
 GITEMAIL := $(shell git config user.email)
 GITNAME := $(shell git config user.name)
@@ -34,7 +37,7 @@ update-spec: clog
 
 clog:
 	@echo "* $(shell date '+%a %b %d %Y') ${GITNAME} <${GITEMAIL}> - ${RHELVER}-${SERIAL}" > clog-spec
-	./tools/git-changelog -t origin/c10s > clog
+	./tools/git-changelog -t ${PREV} > clog
 	cat clog >> clog-spec
 
 # These need to rerun make to pick up the bumped serial number