git: 00294d7b0a2e - main - bsdinstall: Guard against invalid branch/revision

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=00294d7b0a2e3ae3e870333ef7c8ecbc9fa26da3

commit 00294d7b0a2e3ae3e870333ef7c8ecbc9fa26da3
Author:     Ed Maste <emaste@FreeBSD.org>
AuthorDate: 2025-07-25 14:56:22 +0000
Commit:     Ed Maste <emaste@FreeBSD.org>
CommitDate: 2025-07-25 15:33:56 +0000

    bsdinstall: Guard against invalid branch/revision
    
    I somehow ended up with a tree where make -V BRANCH and make -V REVISION
    were broken, resulting in a FreeBSD-base.conf with a broken repo URL.
    Check for BRANCH == RELEASE explicitly and emit a warning if BRANCH does
    not match an expected case.
    
    Reviewed by:    Isaac Freund <ifreund@freebsdfoundation.org>
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D51528
---
 usr.sbin/bsdinstall/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/usr.sbin/bsdinstall/Makefile b/usr.sbin/bsdinstall/Makefile
index 75db149b814b..e5bb3197fa05 100644
--- a/usr.sbin/bsdinstall/Makefile
+++ b/usr.sbin/bsdinstall/Makefile
@@ -22,8 +22,11 @@ REVISION?=	${_REVISION}
 
 .if ${BRANCH} == CURRENT || ${BRANCH} == STABLE
 SUBURL=		base_latest
-.else
+.elif ${BRANCH} == RELEASE
 SUBURL=		base_release_${REVISION:C/[0-9]+\.//}
+.else
+.warning Invalid branch "${BRANCH}"
+SUBURL=		base_latest
 .endif
 
 FreeBSD-base.conf: FreeBSD-base.conf.in