#!/usr/bin/make -f

# see EXAMPLES in dpkg-buildflags(1) and read /usr/share/dpkg/*
DPKG_EXPORT_BUILDFLAGS = 1
export DEB_BUILD_MAINT_OPTIONS = hardening=+all
include /usr/share/dpkg/default.mk

DPDK_ABI := $(shell echo $(DEB_VERSION_UPSTREAM) | cut -d '-' -f1 | cut -d '.'  -f1-2 | cut -d '~' -f1)

ifeq (,$(findstring terse,$(DEB_BUILD_OPTIONS)))
	export DH_VERBOSE=1
	export DH_OPTIONS=-v
endif

# People rebuilding this package can overwrite RTE_MACHINE
# via DEB_BUILD_OPTIONS if they like
ifneq (,$(filter rte_machine=%,$(DEB_BUILD_OPTIONS)))
    RTE_MACHINE ?= $(patsubst rte_machine=%,%,$(filter rte_machine=%,$(DEB_BUILD_OPTIONS)))
endif
# default to minimal base, without setting this it would build
# -march=native which is a non portable invariant
RTE_MACHINE ?= "default"

# now stable with parallel comilation, so support -j
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    PAR := $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
    MAKEFLAGS += -j$(PAR)
endif

ifneq (,$(findstring nodoc,$(DEB_BUILD_PROFILES)))
BUILD_DOCS=n
else
ifneq (,$(findstring nodoc,$(DEB_BUILD_OPTIONS)))
BUILD_DOCS=n
# to stop dh_installdoc from running
export DEB_BUILD_PROFILES += nodoc
else
BUILD_DOCS=y
endif
endif

# Allow to pass specific configure flags to meson as a comma separated list
ifneq (,$(filter dpdk_config_options=%,$(DEB_BUILD_OPTIONS)))
# GNU Makefile hack: can't directly escape comma and spaces, so use variables
    comma := ,
    space :=
    space +=
    DPDK_CONFIG_OPTIONS ?= $(subst $(comma),$(space),$(patsubst dpdk_config_options=%,%,$(filter dpdk_config_options=%,$(DEB_BUILD_OPTIONS))))
endif

# kernel_modules can be passed via DEB_BUILD_OPTIONS to enable building the
# optional binary kernel modules package. By default it will be built against
# the current kernel, or ksrc can be passed with a path to the target kernel
# sources instead.
ifeq (,$(findstring kernel_modules,$(DEB_BUILD_OPTIONS)))
DPDK_CONFIG_BUILD_KMOD=false
KSRC=""
else
ifneq (,$(filter ksrc=%,$(DEB_BUILD_OPTIONS)))
    KSRC := $(patsubst ksrc=%,%,$(filter ksrc=%,$(DEB_BUILD_OPTIONS)))
else
    KSRC := /lib/modules/$(shell LIST=$$(ls /lib/modules/); for dir in $$LIST; do test -d /lib/modules/$$dir/build && echo $$dir; done | sort -V | tail -n1)/build
endif

KVERS := $(shell perl debian/kernel-version $(KSRC))
export KVERS
export MODULE_CFLAGS=-fno-PIE

DPDK_CONFIG_BUILD_KMOD=true

# Since the binary module package is generated at build time depending on the
# local kernel version, we have to append the new package in d/control.
# We cannot use a separate control file since that wouldn't work with
# dpkg-genchanges, and also would require a lot of overrides for debhelpers.
get_built_using	?= $(filter-out (=),$(shell dpkg-query -f='$${source:Package} (=$${source:Version})' -W $1))

build:
	@if [ x"$(KVERS)" = x ] ; then \
	    echo 'No version in $(KSRC)/include/linux/version.h' >&2; \
	    exit 1; \
	fi
	sh debian/prep-modules $(KSRC)
	cat debian/control.modules >> debian/control
	dh $@ --with python3,dkms,systemd --buildsystem=meson
endif

%:
	dh $@ --with python3,dkms,systemd --buildsystem=meson

override_dh_gencontrol:
	dh_gencontrol
	# debian/files will not exist until dh_gencontrol has ran at least once,
	# so we need to run gencontrol for libdpdk-dev after.
	# The list of libraries and PMDs is everchanging, so generate the dependency
	# list for libdpdk-dev to avoid having to maintain it manually.
	# Same for the recommends list for dpdk, were we want the PMDs and the mempools.
	dh_gencontrol -p libdpdk-dev -- -V"librte:Depends=`grep -E 'librte-*' ./debian/files | grep -v dbgsym | tr '_' ' ' | awk '{ print $$1,"(=",$$2 ")" }' | paste -sd ',' - | sed -e 's/,/, /g'`"
	dh_gencontrol -p dpdk -- -V"librte:Suggests=`grep -E 'librte-(pmd|mempool).*' ./debian/files | grep -v dbgsym | tr '_' ' ' | awk '{ print $$1,"(=",$$2 ")" }' | paste -sd ',' - | sed -e 's/,/, /g'`"
ifneq (,$(findstring kernel_modules,$(DEB_BUILD_OPTIONS)))
	dh_gencontrol -p dpdk-modules-$(KVERS) -- \
		-v`cat debian/VERSION` \
		-V'built:using:kernel=$(call get_built_using,linux-headers-$(KVERS))'
endif

override_dh_auto_clean:
	rm -rf debian/build debian/tmp debian/dpdk-modules-* \
		debian/control.modules debian/VERSION
	sed -i '/Package: dpdk-modules-/,/`tail -n1 debian/control.modules.in`/d' debian/control
	rm -f debian/dpdk-igb-uio-dkms.dkms debian/dpdk-rte-kni-dkms.dkms
	rm -f doc/guides/compressdevs/overview_feature_table.txt \
		doc/guides/cryptodevs/overview_aead_table.txt \
		doc/guides/cryptodevs/overview_asym_table.txt \
		doc/guides/cryptodevs/overview_auth_table.txt \
		doc/guides/cryptodevs/overview_cipher_table.txt \
		doc/guides/cryptodevs/overview_feature_table.txt \
		doc/guides/nics/overview_table.txt
	dh_auto_clean

override_dh_auto_configure:
	dh_auto_configure -- $(DPDK_CONFIG_OPTIONS) \
		--includedir=include/dpdk \
		--default-library=shared \
		-Dper_library_versions=false \
		-Dinclude_subdir_arch=../$(DEB_HOST_MULTIARCH)/dpdk \
		-Dmachine=$(RTE_MACHINE) \
		-Dkernel_dir=$(KSRC) \
		-Denable_kmods=$(DPDK_CONFIG_BUILD_KMOD)

override_dh_auto_build-indep:
ifeq (y,$(BUILD_DOCS))
	dh_auto_build -- doc
	# NINJA DOC INSTALL DOES NOT WORK - .buildinfo present, css missing
	rm -f obj-$(DEB_HOST_MULTIARCH)/doc/guides/guides/.buildinfo
endif

# ninja install doc does not work, will rebuild everything,
# only dpdk-doc as arch: all so just skip it
override_dh_auto_install-indep:

override_dh_auto_install-arch:
	dh_auto_install
	# have the DKMS build include the correct per-arch directory
	sed "s/@@DEB_HOST_MULTIARCH@@/$(DEB_HOST_MULTIARCH)/g" debian/dpdk-igb-uio-dkms.dkms.in > debian/dpdk-igb-uio-dkms.dkms
	sed "s/@@DEB_HOST_MULTIARCH@@/$(DEB_HOST_MULTIARCH)/g" debian/dpdk-rte-kni-dkms.dkms.in > debian/dpdk-rte-kni-dkms.dkms
	# Package(s): libdpdk-<NAME><VER> (bare runtime libs and PMDs)
	for lib in $$(ls -1 debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)/*.so.*); do \
	  LN=$$(basename $${lib} | sed -e 's/\.so\.[0-9\.]*$$//' | tr '_' '-'); \
	  if echo $${LN} | grep -q ".*[0-9]$$"; then \
	    PKG=$${LN}-$(DPDK_ABI); \
	  else \
	    PKG=$${LN}$(DPDK_ABI); \
	  fi; \
	  LIBF="$$(basename $${lib})"; \
	  dh_install -p $${PKG} usr/lib/$(DEB_HOST_MULTIARCH)/$${LIBF}; \
	  if [ -f debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)/*/*/$${LIBF} ]; then \
	    dh_install -p $${PKG} usr/lib/$(DEB_HOST_MULTIARCH)/*/*/$${LIBF}; \
	  fi; \
	done
	# Package: dpdk-igb-uio-dkms
	dh_install -p dpdk-igb-uio-dkms kernel/linux/igb_uio/* \
		usr/src/dpdk-igb-uio-$(DEB_VERSION_UPSTREAM)
	# Package: dpdk-rte-kni-dkms
	dh_install -p dpdk-rte-kni-dkms kernel/linux/kni/* \
		usr/src/dpdk-rte-kni-$(DEB_VERSION_UPSTREAM)
ifneq (,$(KVERS))
	# Package: dpdk-modules-<kernel version>
	dh_install -p dpdk-modules-$(KVERS) lib/modules
endif
	# Strip RPATH, hard-coded in test/test/meson.build at the moment
	chrpath --delete $(CURDIR)/debian/tmp/usr/bin/dpdk-test

override_dh_dkms:
	dh_dkms -V $(DEB_VERSION_UPSTREAM)

override_dh_installinit:
	dh_installinit --no-start --no-stop-on-upgrade

override_dh_systemd_start:
	dh_systemd_start --no-start --no-stop-on-upgrade

override_dh_auto_test:

override_dh_python3:
	# dh_python only looks in /usr/share/package_name but dpdk-doc installs in
	# /usr/share/dpdk, so pass /usr to catch all
	dh_python3 --shebang=/usr/bin/python3 /usr

override_dh_missing:
	dh_missing --fail-missing