project-edgeos/eclass/gmec-kernel.eclass

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Check for EAPI 5+
case "${EAPI:-0}" in
0|1|2|3|4) die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}" ;;
5|6) inherit eapi7-ver ;;
7) ;;
esac
inherit cos-kernel

_build_kernel_config() {
	"${FILESDIR}"/build_kernel_config.py --base "${FILESDIR}/config.kernel" "${@}" "${FILESDIR}/common" "${FILESDIR}"
}

_generate() {
	CHROMEOS_KERNEL_CONFIG="${TMPDIR}/kernel.config"
	einfo "Generating kernel config at ${CHROMEOS_KERNEL_CONFIG}..."
	_build_kernel_config > "${CHROMEOS_KERNEL_CONFIG}"
	echo "# CONFIG_LOCALVERSION_AUTO is not set" >> "${CHROMEOS_KERNEL_CONFIG}"
}

_verify() {
	einfo "Verifying Config..."
	_build_kernel_config --verify "$(cros-workon_get_build_dir)/.config"
}


gmec-kernel_src_configure() {
	_generate || die "Error generating kernel config..."
	cos-kernel_src_configure
	_verify || die "$(_verify)"
}

_rename_artifact() {
	local path="${1}"
	local old="${2}"
	local kernel="${3}"
	local name="$(basename "${path}")"
	local new_name="${name/${old}/${kernel}}"
	local new_path="$(dirname "${path}")/${new_name}"
	if [[ -e "${new_path}" ]]; then
		return 0
	fi
	mv "${path}" "${new_path}"
}

_rename_kernel_artifact() {
	_rename_artifact "${1}" "kernel" "${2}"
}

gmec-kernel_src_install() {
	cos-kernel_src_install

	# Because we install both a vanilla and RT kernel, fix up the artifacts to
	# have unique names.
	if [[ -n "${GMEC_KERNEL_SUFFIX}" ]]; then
		einfo "Fixing up artifacts..."
		_rename_kernel_artifact "${D}/opt/google/src/kernel-src.tar.gz" "kernel-${GMEC_KERNEL_SUFFIX}"
		_rename_kernel_artifact "${D}/opt/google/src/kernel-headers.tgz" "kernel-${GMEC_KERNEL_SUFFIX}"
		_rename_kernel_artifact "${D}/etc/kernel_info" "kernel_${GMEC_KERNEL_SUFFIX}"
		_rename_artifact "${D}/boot/vmlinuz" "vmlinuz" "vmlinuz-${GMEC_KERNEL_SUFFIX}"
		_rename_kernel_artifact "${D}/etc/kernel_commit" "kernel-${GMEC_KERNEL_SUFFIX}"
		_rename_kernel_artifact "${D}/etc/kernel_info" "kernel-${GMEC_KERNEL_SUFFIX}"
		_rename_artifact "${D}/etc/os-release.d/KERNEL_COMMIT_ID" "KERNEL" "KERNEL_${GMEC_KERNEL_SUFFIX^^}"
		_rename_artifact "${D}/etc/toolchain_env" "toolchain" "toolchain_${GMEC_KERNEL_SUFFIX}"
		_rename_artifact "${D}/usr/lib/debug/boot/vmlinux" "vmlinux" "vmlinux-${GMEC_KERNEL_SUFFIX}"
		_rename_artifact "${D}/usr/lib/debug/boot/vmlinux.debug" "vmlinux.debug" "vmlinuz-${GMEC_KERNEL_SUFFIX}.debug"
	fi

	# Lakitu uses this to sign their nvidia drivers, but EdgeOS doesn't need it.
	rm "${D}"/etc/ima/pubkey.x509
}