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# Copyright 2026 Gurov <thuggerthugger1@duck.com>
# Distributed under the terms of the GNU General Public License v2
SUMMARY="Prebuilt CachyOS Linux kernel with matching module headers"
HOMEPAGE="https://github.com/CachyOS/linux-cachyos"
MY_RELEASE="${PV}-2"
MY_KERNEL="linux-cachyos-${MY_RELEASE}-x86_64_v3.pkg.tar.zst"
MY_HEADERS="linux-cachyos-headers-${MY_RELEASE}-x86_64_v3.pkg.tar.zst"
KERNEL_RELEASE="${MY_RELEASE}-cachyos"
DOWNLOADS="
https://mirror.cachyos.org/repo/x86_64_v3/cachyos-v3/${MY_KERNEL}
https://mirror.cachyos.org/repo/x86_64_v3/cachyos-v3/${MY_HEADERS}
"
LICENCES="GPL-2"
SLOT="0"
PLATFORMS="~amd64"
RESTRICT="mirror strip test"
DEPENDENCIES="
build:
app-arch/zstd
build+run:
sys-apps/kmod[zstd]
run:
app-arch/zstd
dev-lang/clang
dev-lang/llvm
dev-libs/openssl
dev-libs/xxHash
dev-util/dwarves
dev-util/elfutils
sys-apps/systemd
sys-boot/dracut
sys-devel/binutils
sys-devel/lld
sys-libs/zlib
"
WORK="${WORKBASE}"
pkg_pretend() {
if exhost --is-native -q && [[ ${ROOT} == / ]]; then
local flags flag
flags=$(grep -m1 '^flags[[:space:]]*:' /proc/cpuinfo) || die "Cannot check CPU features"
for flag in avx avx2 bmi1 bmi2 f16c fma movbe sse4_1 sse4_2 popcnt abm; do
[[ " ${flags} " == *" ${flag} "* ]] || die "CachyOS x86-64-v3 kernel requires CPU feature ${flag}"
done
fi
}
src_unpack() {
local archive checksum expected
for archive in "${MY_KERNEL}" "${MY_HEADERS}"; do
case ${archive} in
"${MY_KERNEL}") expected=1cb3b27ee69d0ef743d8c30e5811e128376ecf23bc62536405f4e86ffedf1086 ;;
"${MY_HEADERS}") expected=ba982020097ef03b43ae5644e3ce6ec0942c468032f62d15b47d6be475b7d2af ;;
esac
checksum=$(sha256sum "${FETCHEDDIR}/${archive}") || die "Cannot checksum ${archive}"
[[ ${checksum%% *} == ${expected} ]] || die "CachyOS archive changed: ${archive}"
done
edo mkdir -p "${WORK}/binary" "${WORK}/headers"
edo tar --zstd -xf "${FETCHEDDIR}/${MY_KERNEL}" -C "${WORK}/binary"
edo tar --zstd -xf "${FETCHEDDIR}/${MY_HEADERS}" -C "${WORK}/headers"
}
src_compile() {
:
}
src_install() {
local modules="/usr/$(exhost --target)/lib/modules/${KERNEL_RELEASE}"
local binary="${WORK}/binary/usr/lib/modules/${KERNEL_RELEASE}"
local headers="${WORK}/headers/usr/lib/modules/${KERNEL_RELEASE}"
[[ -f ${binary}/vmlinuz && -d ${binary}/kernel && -f ${headers}/build/.config &&
-f ${headers}/build/Module.symvers && -f ${headers}/build/System.map &&
-d ${headers}/vdso ]] || die "CachyOS kernel or matching headers are missing"
dodir "${modules}"
edo cp -a "${binary}/." "${IMAGE}${modules}/"
edo cp -a "${headers}/." "${IMAGE}${modules}/"
edo depmod -b "${IMAGE}" -m "/usr/$(exhost --target)/lib/modules" -a "${KERNEL_RELEASE}"
}
pkg_postinst() {
local image="/usr/lib/modules/${KERNEL_RELEASE}/vmlinuz"
local retry="kernel-install add ${KERNEL_RELEASE} ${image}"
if [[ ${ROOT} != / ]] || ! exhost --is-native -q; then
elog "Boot setup skipped for non-native or alternate-root installation."
elog "On the target system, run: ${retry}"
elif ! mountpoint -q /boot || ! command -v kernel-install >/dev/null ||
! command -v dracut >/dev/null; then
ewarn "Boot setup skipped: /boot must be mounted and kernel-install and dracut available."
ewarn "After fixing boot setup, run: ${retry}"
elif ! kernel-install add "${KERNEL_RELEASE}" "${image}"; then
ewarn "Boot entry or initramfs creation failed; check output above."
ewarn "After fixing boot setup, run: ${retry}"
else
elog "CachyOS boot entry and initramfs installed via kernel-install."
fi
ewarn "With Secure Boot enabled, kernel-install does not guarantee a trusted kernel signature."
ewarn "Verify signing and boot entry before booting CachyOS; keep your working kernel as fallback."
}
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