#!/usr/bin/make -f

include /usr/share/dpkg/default.mk

LSB_DISTRIBUTOR := $(shell lsb_release -is)
NAME := $(shell awk '$$1 == "Name:" { print $$2; }' META)
LINUX_MIN  := $(shell awk '/Linux-Minimum:/{print $$2}' META)
LINUX_NEXT := $(shell awk -F'[ .]' '/Linux-Maximum:/{print $$2 "." $$3+1}' META)

DKMSFILES := module include config zfs.release.in autogen.sh META AUTHORS \
		COPYRIGHT LICENSE README.md

ifndef KVERS
KVERS=$(shell uname -r)
endif

non_epoch_version=$(shell echo $(KVERS) | perl -pe 's/^\d+://')
PACKAGE=openzfs-zfs
pmodules = $(PACKAGE)-modules-$(non_epoch_version)

export DEB_BUILD_MAINT_OPTIONS = hardening=+all

NUM_CPUS = $(shell nproc 2>/dev/null)
PARALLEL = $(subst parallel=,,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
NJOBS    = -j$(or $(PARALLEL),$(NUM_CPUS),1)

%:
	dh $@ --with autoreconf,dkms,python3,sphinxdoc

override_dh_autoreconf:
	@# Embed the downstream version in the module.
	@sed -e 's/^Version:.*/Version:       $(DEB_VERSION_UPSTREAM)/' -i.orig META

	dh_autoreconf

override_dh_auto_configure:
	@# Build the userland, but don't build the kernel modules.
	dh_auto_configure -- @CFGOPTS@ \
	  --bindir=/usr/bin \
	  --sbindir=/sbin \
	  --libdir=/lib/"$(DEB_HOST_MULTIARCH)" \
	  --with-udevdir=/lib/udev \
	  --with-zfsexecdir=/usr/lib/zfs-linux \
	  --enable-systemd \
	  --enable-pyzfs \
	  --with-python=python3 \
	  --with-pammoduledir='/lib/$(DEB_HOST_MULTIARCH)/security' \
	  --with-pkgconfigdir='/usr/lib/$(DEB_HOST_MULTIARCH)/pkgconfig' \
	  --with-systemdunitdir=/lib/systemd/system \
	  --with-systemdpresetdir=/lib/systemd/system-preset \
	  --with-systemdgeneratordir=/lib/systemd/system-generators \
	  --with-config=user

	for i in $(wildcard $(CURDIR)/debian/*.install.in) ; do \
		basename "$$i" | grep _KVERS_ && continue ; \
		sed 's/@DEB_HOST_MULTIARCH@/$(DEB_HOST_MULTIARCH)/g' "$$i" > "$${i%%.in}" ; \
	done

override_dh_gencontrol:
	dh_gencontrol -- -Vlinux:Recommends="linux-libc-dev (<< $(LINUX_NEXT)~), linux-libc-dev (>= $(LINUX_MIN)~),"

override_dh_auto_build:
	@# Get a bare copy of the source code for DKMS.
	@# This creates the $(CURDIR)/$(NAME)-$(DEB_VERSION_UPSTREAM)/ tree, which does not
	@# contain the userland sources. NB: Remove-userland-dist-rules.patch
	$(MAKE) distdir

	dh_auto_build

override_dh_auto_install:
	@# Install the utilities.
	$(MAKE) install DESTDIR='$(CURDIR)/debian/tmp'

	# Use upstream's bash completion
	install -D -t '$(CURDIR)/debian/tmp/usr/share/bash-completion/completions/' \
		'$(CURDIR)/contrib/bash_completion.d/zfs'

	# Move from bin_dir to /usr/sbin
	# Remove suffix (.py) as per policy 10.4 - Scripts
	# https://www.debian.org/doc/debian-policy/ch-files.html#s-scripts
	mkdir -p '$(CURDIR)/debian/tmp/usr/sbin/'
	mv '$(CURDIR)/debian/tmp/usr/bin/arc_summary' '$(CURDIR)/debian/tmp/usr/sbin/arc_summary'
	mv '$(CURDIR)/debian/tmp/usr/bin/arcstat' '$(CURDIR)/debian/tmp/usr/sbin/arcstat'
	mv '$(CURDIR)/debian/tmp/usr/bin/dbufstat' '$(CURDIR)/debian/tmp/usr/sbin/dbufstat'
	mv '$(CURDIR)/debian/tmp/usr/bin/zilstat' '$(CURDIR)/debian/tmp/usr/sbin/zilstat'

	@# Zed has dependencies outside of the system root.
	mv '$(CURDIR)/debian/tmp/sbin/zed' '$(CURDIR)/debian/tmp/usr/sbin/zed'

	@# Install the DKMS source.
	@# We only want the files needed to build the modules
	install -D -t '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/scripts' \
		'$(CURDIR)/scripts/enum-extract.pl' \
		'$(CURDIR)/scripts/dkms.postbuild'
	$(foreach file,$(DKMSFILES),mv '$(CURDIR)/$(NAME)-$(DEB_VERSION_UPSTREAM)/$(file)' '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)' || exit 1;)

	@# Only ever build Linux modules
	echo 'SUBDIRS = linux' > '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/include/os/Makefile.am'

	@# Hellish awk line:
	@#  * Deletes from configure.ac the parts not needed for building the kernel module
	@#     * It deletes from inside AC_CONFIG_FILES([]) everything except:
	@#        - Makefile$
	@#        - include/(Makefile|sys|os/(Makefile|linux))
	@#        - module/
	@#        - zfs.release$
	@#  * Takes care of spaces and tabs
	@#  * Remove reference to ZFS_AC_PACKAGE
	awk '/^AC_CONFIG_FILES\(\[/,/^\]\)/ {\
		if ($$0 !~ /^(AC_CONFIG_FILES\(\[([ \t]+)?$$|\]\)([ \t]+)?$$|([ \t]+)?(include\/(Makefile|sys|os\/(Makefile|linux))|module\/|Makefile([ \t]+)?$$|zfs\.release([ \t]+)?$$))/) \
		{next} } {print}' \
		'$(CURDIR)/$(NAME)-$(DEB_VERSION_UPSTREAM)/configure.ac' | sed '/ZFS_AC_PACKAGE/d' > '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/configure.ac'
	@# Set "SUBDIRS = module include" for CONFIG_KERNEL and remove SUBDIRS for all other configs.
	@# Do not regenerate zfs_gitrev.h during dkms build
	sed '1,/CONFIG_KERNEL/s/SUBDIRS.*=.*//g;s/SUBDIRS.*=.*/SUBDIRS = module include/g;/make_gitrev.sh/d' \
		'$(CURDIR)/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am' > '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am'
	@# Sanity test
	grep -q 'SUBDIRS = module include' '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am'
	sed -i '/rpm.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/cmd.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/contrib.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/etc.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/lib.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/man.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/scripts.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/tests.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	sed -i '/udev.Makefile/d' $(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/Makefile.am
	@# Run autogen on the stripped source tree
	cd '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)'; ./autogen.sh
	rm -fr '$(CURDIR)/debian/tmp/usr/src/$(NAME)-$(DEB_VERSION_UPSTREAM)/autom4te.cache'

	for i in `ls $(CURDIR)/debian/tmp/lib/$(DEB_HOST_MULTIARCH)/*.so`; do \
		ln -s '/lib/$(DEB_HOST_MULTIARCH)/'`readlink $${i}` '$(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)/'`basename $${i}`; \
		rm $${i}; \
	done

	chmod a-x '$(CURDIR)/debian/tmp/etc/zfs/zfs-functions'
	chmod a-x '$(CURDIR)/debian/tmp/etc/default/zfs'
	chmod a-x '$(CURDIR)/debian/tmp/usr/share/bash-completion/completions/zfs'

override_dh_python3:
	dh_python3 -p openzfs-python3-pyzfs

override_dh_dkms:
	'$(CURDIR)/scripts/dkms.mkconf' -n $(NAME) -v $(DEB_VERSION_UPSTREAM) -f '$(CURDIR)/scripts/zfs-dkms.dkms'
	dh_dkms
	rm -f '$(CURDIR)/scripts/zfs-dkms.dkms'

override_dh_makeshlibs:
	dh_makeshlibs -a -V

override_dh_strip:
	dh_strip

override_dh_auto_clean:
	rm -rf zfs-$(DEB_VERSION_UPSTREAM)
	dh_auto_clean
	@if test -e META.orig; then mv META.orig META; fi

override_dh_install:
	find debian/tmp/lib -name '*.la' -delete
	dh_install

override_dh_missing:
	dh_missing --fail-missing

override_dh_installinit:
	dh_installinit -r --no-restart-after-upgrade --name zfs-import
	dh_installinit -r --no-restart-after-upgrade --name zfs-mount
	dh_installinit -r --no-restart-after-upgrade --name zfs-load-key
	dh_installinit -R --name zfs-share
	dh_installinit -R --name zfs-zed

override_dh_installsystemd:
	mkdir -p debian/openzfs-zfsutils/lib/systemd/system
	ln -sr /dev/null debian/openzfs-zfsutils/lib/systemd/system/zfs-import.service
	dh_installsystemd --no-stop-on-upgrade -X zfs-zed.service
	dh_installsystemd --name zfs-zed

override_dh_installdocs:
	dh_installdocs -A
ifeq (,$(findstring nodoc, $(DEB_BUILD_OPTIONS)))
	http_proxy='127.0.0.1:9' sphinx-build -N -bhtml "$(CURDIR)/contrib/pyzfs/docs/source/" debian/openzfs-pyzfs-doc/usr/share/doc/openzfs-pyzfs-doc/html/
endif

# ------------

override_dh_prep-deb-files:
	for templ in $(wildcard $(CURDIR)/debian/*_KVERS_*.in); do \
		sed -e 's/##KVERS##/$(KVERS)/g ; s/#KVERS#/$(KVERS)/g ; s/_KVERS_/$(KVERS)/g ; s/##KDREV##/$(KDREV)/g ; s/#KDREV#/$(KDREV)/g ; s/_KDREV_/$(KDREV)/g ; s/_ARCH_/$(DEB_HOST_ARCH)/' \
		< $$templ > `echo $$templ | sed -e 's/_KVERS_/$(KVERS)/g ; s/_ARCH_/$(DEB_HOST_ARCH)/g ; s/\.in$$//'` ; \
	done
	sed -e 's/##KVERS##/$(KVERS)/g ; s/#KVERS#/$(KVERS)/g ; s/_KVERS_/$(KVERS)/g ; s/##KDREV##/$(KDREV)/g ; s/#KDREV#/$(KDREV)/g ; s/_KDREV_/$(KDREV)/g ; s/_ARCH_/$(DEB_HOST_ARCH)/g' \
	< debian/control.modules.in > debian/control

override_dh_configure_modules: override_dh_configure_modules_stamp
override_dh_configure_modules_stamp:
	./configure @CFGOPTS@ \
		--with-config=kernel \
		--with-linux=$(KSRC) \
		--with-linux-obj=$(KOBJ)
	touch override_dh_configure_modules_stamp

override_dh_binary-modules: override_dh_prep-deb-files override_dh_configure_modules
	dh_testdir
	dh_testroot
	dh_prep

	$(MAKE) $(NJOBS) -C $(CURDIR)/module modules

	dh_install -p${pmodules}
	dh_installdocs -p${pmodules}
	dh_installchangelogs -p${pmodules}
	dh_compress -p${pmodules}
	dh_strip -p${pmodules}
	dh_fixperms -p${pmodules}
	dh_installdeb -p${pmodules}
	dh_gencontrol -p${pmodules}
	dh_md5sums -p${pmodules}
	dh_builddeb -p${pmodules}

debian-copyright:
	cme update dpkg-copyright -file debian/copyright.cme