#!/usr/bin/make -f
# -*- makefile -*-

# TODO: check for headers not being installed
BUILD_DIR=$(shell pwd)

include /usr/share/dpkg/default.mk
include debian/rules.d/env.mk
include debian/rules.d/${DEB_BUILD_ARCH}.mk

CHANGELOG_DATE:=$(shell dpkg-parsechangelog -SDate)

PVE_KERNEL_PKG=pve-kernel-${KVNAME}
PVE_HEADER_PKG=pve-headers-${KVNAME}
PVE_USR_HEADER_PKG=pve-kernel-libc-dev
LINUX_TOOLS_PKG=linux-tools-${KERNEL_MAJMIN}
KERNEL_SRC_COPY=${KERNEL_SRC}_tmp

# If no custom compiler is specified, use the default
PVE_BUILD_CC ?= ${CC}

%:
	dh $@ --with quilt

debian/control: $(wildcard debian/*.in)
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/templates/pve-kernel.prerm.in > debian/${PVE_KERNEL_PKG}.prerm
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/templates/pve-kernel.postrm.in > debian/${PVE_KERNEL_PKG}.postrm
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/templates/pve-kernel.postinst.in > debian/${PVE_KERNEL_PKG}.postinst
	sed -e 's/@@KVNAME@@/${KVNAME}/g' < debian/templates/pve-headers.postinst.in > debian/${PVE_HEADER_PKG}.postinst
	chmod +x debian/${PVE_KERNEL_PKG}.prerm
	chmod +x debian/${PVE_KERNEL_PKG}.postrm
	chmod +x debian/${PVE_KERNEL_PKG}.postinst
	chmod +x debian/${PVE_HEADER_PKG}.postinst
	sed -e 's/@KVNAME@/${KVNAME}/g' -e 's/@KVMAJMIN@/${KERNEL_MAJMIN}/g' < debian/templates/control.in > debian/control

debian/SOURCE:
	echo "git clone git@github.com:fabianishere/pve-kernel-edge.git\\ngit checkout $(shell git rev-parse HEAD)" > $@

override_dh_quilt_patch:
	cd linux; \
		QUILT_PATCHES=../debian/patches  \
		QUILT_SERIES=series.linux \
		quilt --quiltrc /dev/null --color=always push -a || test $$? = 2

override_dh_quilt_unpatch:
	cd linux; \
		QUILT_PATCHES=../debian/patches \
		QUILT_SERIES=series.linux \
		quilt --quiltrc /dev/null pop -a || test $$? = 2
	rm -rf linux/.pc

override_dh_auto_build: .compile_mark .tools_compile_mark .modules_compile_mark

override_dh_auto_install: debian/SOURCE .install_mark .tools_install_mark .headers_install_mark .usr_headers_install_mark
	dh_installdocs -A debian/copyright debian/SOURCE
	dh_installchangelogs
	dh_installman
	dh_strip_nondeterminism
	dh_compress
	dh_fixperms

${KERNEL_SRC}/.config:
	${KERNEL_SRC}/scripts/kconfig/merge_config.sh -m \
		-O ${KERNEL_SRC} \
		${KERNEL_SRC}/debian.master/config/config.common.ubuntu \
		${KERNEL_SRC}/debian.master/config/${DEB_BUILD_ARCH}/config.common.${DEB_BUILD_ARCH} \
		${KERNEL_SRC}/debian.master/config/${DEB_BUILD_ARCH}/config.flavour.generic \
		debian/config/config.pve
	${MAKE} -C ${KERNEL_SRC} CC=${PVE_BUILD_CC} oldconfig

.config_mark: ${KERNEL_SRC}/.config
	touch $@

.compile_mark: .config_mark
	${MAKE} -C ${KERNEL_SRC} CC=${PVE_BUILD_CC} KCFLAGS="${PVE_BUILD_CFLAGS}" KBUILD_BUILD_VERSION_TIMESTAMP="${KVNAME} ${PVE_BUILD_TYPE} (${CHANGELOG_DATE})"
	touch $@

.install_mark: .compile_mark .modules_compile_mark
	rm -rf debian/${PVE_KERNEL_PKG}
	mkdir -p debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}
	mkdir debian/${PVE_KERNEL_PKG}/boot
	install -m 644 ${KERNEL_SRC}/.config debian/${PVE_KERNEL_PKG}/boot/config-${KVNAME}
	install -m 644 ${KERNEL_SRC}/System.map debian/${PVE_KERNEL_PKG}/boot/System.map-${KVNAME}
	install -m 644 ${KERNEL_SRC}/${KERNEL_IMAGE_PATH} debian/${PVE_KERNEL_PKG}/boot/${KERNEL_INSTALL_FILE}-${KVNAME}
	${MAKE} -C ${KERNEL_SRC} INSTALL_MOD_PATH=${BUILD_DIR}/debian/${PVE_KERNEL_PKG}/ modules_install
	# install zfs drivers
	install -d -m 0755 debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/zfs
	install -m 644 $(addprefix ${MODULES}/,zfs.ko zavl.ko znvpair.ko zunicode.ko zcommon.ko icp.ko zlua.ko spl.ko zzstd.ko) debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/zfs
	# remove firmware
	rm -rf debian/${PVE_KERNEL_PKG}/lib/firmware
	# strip debug info
	find debian/${PVE_KERNEL_PKG}/lib/modules -name \*.ko -print | while read f ; do strip --strip-debug "$$f"; done
	# finalize
	/sbin/depmod -b debian/${PVE_KERNEL_PKG}/ ${KVNAME}
	# Autogenerate blacklist for watchdog devices (see README)
	install -m 0755 -d debian/${PVE_KERNEL_PKG}/lib/modprobe.d
	ls debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/kernel/drivers/watchdog/ > watchdog-blacklist.tmp
	echo ipmi_watchdog.ko >> watchdog-blacklist.tmp
	cat watchdog-blacklist.tmp|sed -e 's/^/blacklist /' -e 's/.ko$$//'|sort -u > debian/${PVE_KERNEL_PKG}/lib/modprobe.d/blacklist_${PVE_KERNEL_PKG}.conf
	rm -f debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/source
	rm -f debian/${PVE_KERNEL_PKG}/lib/modules/${KVNAME}/build
	touch $@

.tools_compile_mark: .compile_mark
	${MAKE} -C ${KERNEL_SRC}/tools/perf prefix=/usr HAVE_NO_LIBBFD=1 HAVE_CPLUS_DEMANGLE_SUPPORT=1 NO_LIBPYTHON=1 NO_LIBPERL=1 NO_LIBCRYPTO=1 PYTHON=python2.7
	echo "checking GPL-2 only perf binary for library linkage with incompatible licenses.."
	! ldd ${KERNEL_SRC}/tools/perf/perf | grep -q -E '\blibbfd'
	! ldd ${KERNEL_SRC}/tools/perf/perf | grep -q -E '\blibcrypto'
	${MAKE} -C ${KERNEL_SRC}/tools/perf man
	touch $@

.tools_install_mark: .tools_compile_mark
	rm -rf debian/${LINUX_TOOLS_PKG}
	mkdir -p debian/${LINUX_TOOLS_PKG}/usr/bin
	mkdir -p debian/${LINUX_TOOLS_PKG}/usr/share/man/man1
	install -m 755 ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/perf debian/${LINUX_TOOLS_PKG}/usr/bin/perf_$(KERNEL_MAJMIN)
	for i in ${BUILD_DIR}/${KERNEL_SRC}/tools/perf/Documentation/*.1; do \
	    fname="$${i##*/}"; manname="$${fname%.1}"; \
	    install -m644 "$$i" "debian/${LINUX_TOOLS_PKG}/usr/share/man/man1/$${manname}_$(KERNEL_MAJMIN).1"; \
	done
	touch $@

.headers_prepare_mark: .config_mark
	rm -rf debian/${PVE_HEADER_PKG}
	mkdir -p debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	install -m 0644 ${KERNEL_SRC}/.config debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	# copy to allow building in parallel to kernel/module compilation without interference
	rm -rf ${KERNEL_SRC_COPY}
	-cp -ar ${KERNEL_SRC} ${KERNEL_SRC_COPY}
	make -C ${KERNEL_SRC_COPY} mrproper
	cd ${KERNEL_SRC_COPY}; find . -path './debian/*' -prune \
	    -o -path './include/*' -prune \
	    -o -path './Documentation' -prune \
	    -o -path './scripts' -prune \
	    -o -type f \
	    \( \
	        -name 'Makefile*' \
	        -o -name 'Kconfig*' \
	        -o -name 'Kbuild*' \
	        -o -name '*.sh' \
	        -o -name '*.pl' \
	    \) \
	    -print | cpio -pd --preserve-modification-time ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	cd ${KERNEL_SRC_COPY}; cp -a include scripts ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	cd ${KERNEL_SRC_COPY}; \
	    ( \
	        find arch/${KERNEL_HEADER_ARCH} -name include -type d -print | \
	        xargs -n1 -i: find : -type f \
	    ) | \
	    cpio -pd --preserve-modification-time ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	# Workaround for #48
	mv ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/scripts/module.lds.S \
	    ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/scripts/module.lds
	sed -i '$$ d' ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/scripts/module.lds
	touch $@

.headers_compile_mark: .headers_prepare_mark
	# set output to subdir of source to reduce number of hardcoded paths in output files
	rm -rf ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}
	mkdir -p ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}
	cp ${KERNEL_SRC}/.config ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}/.config
	${MAKE} -C ${KERNEL_SRC_COPY} O=${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG} -j1 syncconfig prepare scripts
	find ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG} -name \*.o.ur-\* | xargs rm -f
	rsync --ignore-existing -r -v -a $(addprefix ${BUILD_DIR}/${KERNEL_SRC_COPY}/${PVE_HEADER_PKG}/,arch include kernel scripts tools) ${BUILD_DIR}/debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/
	rm -rf ${BUILD_DIR}/${KERNEL_SRC_COPY}
	touch $@

.headers_install_mark: .compile_mark .modules_compile_mark .headers_compile_mark
	cp ${KERNEL_SRC}/include/generated/compile.h debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}/include/generated/compile.h
	install -m 0644 ${KERNEL_SRC}/Module.symvers debian/${PVE_HEADER_PKG}/usr/src/linux-headers-${KVNAME}
	mkdir -p debian/${PVE_HEADER_PKG}/lib/modules/${KVNAME}
	ln -sf /usr/src/linux-headers-${KVNAME} debian/${PVE_HEADER_PKG}/lib/modules/${KVNAME}/build
	touch $@

.usr_headers_install_mark: PKG_DIR = debian/${PVE_USR_HEADER_PKG}
.usr_headers_install_mark: OUT_DIR = ${PKG_DIR}/usr
.usr_headers_install_mark: .config_mark
	rm -rf '${PKG_DIR}'
	mkdir -p  '${PKG_DIR}'
	$(MAKE) -C ${KERNEL_SRC} headers_check ARCH=$(KERNEL_HEADER_ARCH)
	$(MAKE) -C ${KERNEL_SRC} headers_install ARCH=$(KERNEL_HEADER_ARCH) INSTALL_HDR_PATH='$(CURDIR)'/$(OUT_DIR)
	rm -rf $(OUT_DIR)/include/drm $(OUT_DIR)/include/scsi
	find $(OUT_DIR)/include \( -name .install -o -name ..install.cmd \) -execdir rm {} +

# Move include/asm to arch-specific directory
	mkdir -p $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)
	mv $(OUT_DIR)/include/asm $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
	test ! -d $(OUT_DIR)/include/arch || \
		mv $(OUT_DIR)/include/arch $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
	touch $@

.modules_compile_mark: ${MODULES}/zfs.ko
	touch $@

${MODULES}/zfs.ko: .compile_mark
	cd ${MODULES}/${ZFSDIR}; ./autogen.sh
	cd ${MODULES}/${ZFSDIR}; ./configure --with-config=kernel --with-linux=${BUILD_DIR}/${KERNEL_SRC} --with-linux-obj=${BUILD_DIR}/${KERNEL_SRC}
	${MAKE} -C ${MODULES}/${ZFSDIR}
	cp ${MODULES}/${ZFSDIR}/module/avl/zavl.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/nvpair/znvpair.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/unicode/zunicode.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zcommon/zcommon.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/icp/icp.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zfs/zfs.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/lua/zlua.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/spl/spl.ko ${MODULES}/
	cp ${MODULES}/${ZFSDIR}/module/zstd/zzstd.ko ${MODULES}/