#!/bin/sh

set -eu

cmake_command=${1:-cmake}
script_dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
source_dir=$(CDPATH= cd -- "${script_dir}/../.." && pwd)
work_dir=$(mktemp -d)
trap 'rm -rf "${work_dir}"' EXIT HUP INT TERM

"${cmake_command}" \
	-S "${source_dir}" \
	-B "${work_dir}/build" \
	-DBUILD_TESTING=OFF \
	-DBUILD_DRIVER_ONLY=TRUE \
	-DBUILD_IPOE_DRIVER=TRUE \
	-DBUILD_VLAN_MON_DRIVER=TRUE \
	-DBUILD_PPPOSEQ_DRIVER=TRUE \
	-DIGNORE_GIT=TRUE \
	-DKDIR="${script_dir}"

"${cmake_command}" --build "${work_dir}/build" --parallel 2

DESTDIR="${work_dir}/stage" \
	"${cmake_command}" --install "${work_dir}/build"

test -f "${work_dir}/stage/lib/modules/test-kernel/extra/ipoe.ko"
test -f "${work_dir}/stage/lib/modules/test-kernel/extra/vlan_mon.ko"
test -f "${work_dir}/stage/lib/modules/test-kernel/extra/ppposeq.ko"

if FAIL_MODULES_INSTALL=1 DESTDIR="${work_dir}/failed-stage" \
	"${cmake_command}" --install "${work_dir}/build" \
	>"${work_dir}/failed-install.log" 2>&1; then
	printf '%s\n' 'kernel module installation unexpectedly succeeded' >&2
	exit 1
fi

grep -q 'Failed to install kernel module' "${work_dir}/failed-install.log"