linux-kernel - [PATCH] kbuild: deb-pkg: use default string when variable is unset or null

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Message-ID: <20240704152400.1527619-1-masahiroy@kernel.org>
Date: Fri,  5 Jul 2024 00:23:32 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>
Subject: [PATCH] kbuild: deb-pkg: use default string when variable is unset or null

${DEBFULLNAME-${user}} falls back to ${user} when DEBFULLNAME is unset.
It is more reasonable to do so when DEBFULLNAME is unset or null.

Otherwise, the command:

  $ DEBFULLNAME= make deb-pkg

will leave the name field blank.

The same applies to KBUILD_BUILD_USER and KBUILD_BUILD_HOST.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/package/mkdebian | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index 0cc1913aad30..196b14e8ad47 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -125,12 +125,12 @@ gen_source ()
 rm -rf debian
 mkdir debian
 
-user=${KBUILD_BUILD_USER-$(id -nu)}
-name=${DEBFULLNAME-${user}}
+user=${KBUILD_BUILD_USER:-$(id -nu)}
+name=${DEBFULLNAME:-${user}}
 if [ "${DEBEMAIL:+set}" ]; then
 	email=${DEBEMAIL}
 else
-	buildhost=${KBUILD_BUILD_HOST-$(hostname -f 2>/dev/null || hostname)}
+	buildhost=${KBUILD_BUILD_HOST:-$(hostname -f 2>/dev/null || hostname)}
 	email="${user}@...uildhost}"
 fi
 maintainer="${name} <${email}>"
-- 
2.43.0