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# Copyright 2019-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit mount-boot
MY_P=vanilla-kernel-${PV}-1
TCL_VER=10.1
DESCRIPTION="Pre-built vanilla Linux kernel"
HOMEPAGE="https://www.kernel.org/"
SRC_URI="
amd64? (
https://dev.gentoo.org/~mgorny/binpkg/amd64/kernel/sys-kernel/vanilla-kernel/${MY_P}.xpak
-> ${MY_P}.amd64.xpak
test? (
https://dev.gentoo.org/~mgorny/dist/tinycorelinux-${TCL_VER}-amd64.qcow2
)
)
x86? (
https://dev.gentoo.org/~mgorny/binpkg/x86/kernel/sys-kernel/vanilla-kernel/${MY_P}.xpak
-> ${MY_P}.x86.xpak
test? (
https://dev.gentoo.org/~mgorny/dist/tinycorelinux-${TCL_VER}-x86.qcow2
)
)"
S=${WORKDIR}
LICENSE="GPL-2"
SLOT="${PV}"
KEYWORDS="~amd64 ~x86"
IUSE="+initramfs test"
RESTRICT="!test? ( test ) test? ( userpriv )"
# install-DEPEND actually
# note: we need installkernel with initramfs support!
RDEPEND="
|| (
sys-kernel/installkernel-gentoo
sys-kernel/installkernel-systemd-boot
)
initramfs? ( >=sys-kernel/dracut-049-r2 )
!sys-kernel/vanilla-kernel:${SLOT}"
BDEPEND="
test? (
dev-tcltk/expect
sys-kernel/dracut
amd64? ( app-emulation/qemu[qemu_softmmu_targets_x86_64] )
x86? ( app-emulation/qemu[qemu_softmmu_targets_i386] )
)"
QA_PREBUILT='*'
pkg_pretend() {
mount-boot_pkg_pretend
ewarn "This is an experimental package. The built kernel and/or initramfs"
ewarn "may not work at all or fail with your bootloader configuration. Please"
ewarn "make sure to keep a backup kernel available before testing it."
}
src_unpack() {
ebegin "Unpacking ${MY_P}.${ARCH}.xpak"
tar -x < <(xz -c -d --single-stream "${DISTDIR}/${MY_P}.${ARCH}.xpak")
eend ${?} || die "Unpacking ${MY_P} failed"
}
src_test() {
local image_arch=${ARCH}
local qemu_arch=$(usex amd64 x86_64 i386)
dracut \
--conf /dev/null \
--confdir /dev/null \
--no-hostonly \
--kmoddir "lib/modules/${PV}" \
"${T}/initrd" "${PV}" || die
cp "${DISTDIR}/tinycorelinux-${TCL_VER}-${image_arch}.qcow2" \
"${T}/fs.qcow2" || die
cd "${T}" || die
cat > run.sh <<-EOF || die
#!/bin/sh
exec qemu-system-${qemu_arch} \
-m 256M \
-display none \
-no-reboot \
-kernel '${WORKDIR}/usr/src/linux-${PV}/bzImage' \
-initrd '${T}/initrd' \
-serial mon:stdio \
-hda '${T}/fs.qcow2' \
-append 'root=/dev/sda console=ttyS0,115200n8'
EOF
chmod +x run.sh || die
# TODO: initramfs does not let core finish starting on some systems,
# figure out how to make it better at that
expect - <<-EOF || die "Booting kernel failed"
set timeout 900
spawn ./run.sh
expect {
"Kernel panic" {
send_error "\n* Kernel panic"
exit 1
}
"Entering emergency mode" {
send_error "\n* Initramfs failed to start the system"
exit 1
}
"Core 10.1" {
send_error "\n* Booted to login"
exit 0
}
timeout {
send_error "\n* Kernel boot timed out"
exit 2
}
}
EOF
}
src_install() {
mv * "${ED}" || die
}
pkg_preinst() {
:
}
pkg_postinst() {
if [[ -z ${ROOT} ]]; then
mount-boot_pkg_preinst
if use initramfs; then
ebegin "Building initramfs via dracut"
# putting it alongside kernel image as 'initrd' makes
# kernel-install happier
dracut --force "${EROOT}/usr/src/linux-${PV}/initrd" "${PV}"
eend ${?} || die "Building initramfs failed"
fi
ebegin "Installing the kernel via installkernel"
# note: .config is taken relatively to System.map;
# initrd relatively to bzImage
installkernel "${PV}" \
"${EROOT}/usr/src/linux-${PV}/bzImage" \
"${EROOT}/usr/src/linux-${PV}/System.map"
eend ${?} || die "Installing the kernel failed"
fi
if [[ ! -e ${EROOT}/usr/src/linux ]]; then
ebegin "Creating /usr/src/linux symlink"
ln -f -n -s linux-${PV} "${EROOT}"/usr/src/linux
eend ${?}
else
local symlink_target=$(readlink "${EROOT}"/usr/src/linux)
local symlink_ver=${symlink_target#linux-}
if [[ ${symlink_target} == linux-* && -z ${symlink_ver//[0-9.]/} ]]
then
local symlink_pkg=${CATEGORY}/${PN}-${symlink_ver}
# if the current target is either being replaced, or still
# installed (probably depclean candidate), update the symlink
if has "${symlink_ver}" ${REPLACING_VERSIONS} ||
has_version -r "~${symlink_pkg}"
then
ebegin "Updating /usr/src/linux symlink"
ln -f -n -s linux-${PV} "${EROOT}"/usr/src/linux
eend ${?}
fi
fi
fi
}
pkg_prerm() {
:
}
pkg_postrm() {
rm -f "${EROOT}/usr/src/linux-${PV}/initrd" &&
rmdir --ignore-fail-on-non-empty "${EROOT}/usr/src/linux-${PV}"
}
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