Gentoo ebuild that depends on running dist-kernel

current-kernel-1.ebuild

# Copyright 2021-2023 Gentoo Authors, 2023- Triffid_Hunter
# Distributed under the terms of the GNU General Public License v2

EAPI=7

DESCRIPTION="Ebuild to depend on currently running Kernel"
HOMEPAGE=""
SRC_URI=""

LICENSE=""
SLOT="0"
KEYWORDS="amd64 arm arm64 hppa ppc ppc64 riscv x86"

KERN="$(< /proc/sys/kernel/osrelease)"

EB_B="${EBUILD%.*}"
EB_C="${EB_B%/*}"
EBPATH="${EB_C%/*}/${EB_B##*/}"

RDEPEND="
	|| (
		~sys-kernel/gentoo-kernel-${KERN%%-*}
		~sys-kernel/gentoo-kernel-bin-${KERN%%-*}
		~sys-kernel/vanilla-kernel-${KERN%%-*}
	)"

src_unpack() {
	mkdir -p "$S"
}

src_install() {
	mkdir -p "${D}/etc/local.d"
	echo '#!/bin/bash'  > "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	echo '' >> "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	echo 'KPACK="=$(find /var/db/pkg -name CONTENTS -exec grep -l /lib/modules/$(uname -r)/kernel {} + | cut -d/ -f5-6)"' >> "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	echo 'echo "$KPACK" > /var/db/pkg/'"${CATEGORY}/${PF}"'/RDEPEND' >> "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	echo "sed -ie 's!^RDEPEND.*!RDEPEND='\"\$KPACK\"'!' /var/cache/edb/dep${EBPATH}" >> "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	chmod +x "${D}/etc/local.d/25-update-current-kernel-dependency.start"
	default
}