[PATCH v2] kbuild: pacman-pkg: make "rc" releases adhere to pacman versioning scheme

[Viktor Jägersküpper]

The package versioning scheme does not enable smooth upgrades from "rc"
releases to the corresponding stable releases (e.g. 7.0.0-rc7 -> 7.0.0)
because pacman considers that a downgrade due to the underscore in
pkgver (e.g. 7.0.0_rc7), see e.g. vercmp(8) for an explanation of the
package version comparison used by pacman. Package versions which are
derived from said releases (e.g. built from git revisions) are
similarly affected. Fix this by modifying pkgver in order to remove the
hyphen from kernel versions containing "-rcN", where N is a
non-negative integer.

Acked-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
Signed-off-by: Viktor Jägersküpper <viktor_jaegerskuepper@xxxxxxxxxx>
---
v1 -> v2:
- make the substitution more restrictive
- enhance commit message accordingly
- add Acked-by tag

v1: https://lore.kernel.org/linux-kbuild/20260513231745.51780-1-viktor_jaegerskuepper@xxxxxxxxxx/

BTW this also works for something like "5.10.248-rt143-rc1" which is a
recent example of an "rc" release of a realtime kernel.

 scripts/package/PKGBUILD | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/package/PKGBUILD b/scripts/package/PKGBUILD
index 452374d63c24..1213c8e04671 100644
--- a/scripts/package/PKGBUILD
+++ b/scripts/package/PKGBUILD
@@ -10,7 +10,7 @@ for pkg in $_extrapackages; do
 	pkgname+=("${pkgbase}-${pkg}")
 done
 
-pkgver="${KERNELRELEASE//-/_}"
+pkgver="$(echo "${KERNELRELEASE}" | sed 's/-\(rc[0-9]\+\)/\1/;s/-/_/g')"
 # The PKGBUILD is evaluated multiple times.
 # Running scripts/build-version from here would introduce inconsistencies.
 pkgrel="${KBUILD_REVISION}"

---
base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731

Best regards,
Viktor
-- 
2.54.0