#!/usr/bin/make -f

# Notes
# -----
#
# - Bindings for all available Ruby, Python, Lua, and PHP versions (as
#   determined in RUBY_VERSIONS, PYTHON_VERSIONS, LUA_VERSIONS,
#   PHP_VERSIONS, respectively) are built, using the minimum number of
#   configure/make/install cycles (BUILD_COUNT, BUILDS). Builds are
#   performed out-of-tree, in directories debian/build-1,
#   debian/build-2, etc..
#
# - Targets for individual builds are generated in GNU Make on the
#   fly, by evaluating expansions of the `DH_AUTO_TEMPLATE' variable
#   multiple times. (See the foreach loop below the variable
#   definition.) Multiple recipies for the `override_dh_auto_clean'
#   target as well as multiple prerequisites for the
#   `override_dh_auto_{configure,build}' targets are defined. Only the
#   last build contains the full feature set (including FUSE support
#   and Perl, OCaml, and GLib bindings).
#
# - Running `debian/rules output_template' can be used to inspect the
#   targets that have been generated using `DH_AUTO_TEMPLATE'.

# export DH_VERBOSE=1
include /usr/share/dpkg/architecture.mk

PYTHON_VERSIONS := $(shell py3versions --supported)
RUBY_VERSIONS   := $(shell dh_ruby --print-supported)
LUA_VERSIONS    := $(shell find /usr/bin/ -name 'lua5.?' \
			| xargs -n1 readlink -f | xargs -r -n1 basename)
PHP_VERSIONS    := $(subst -config,,\
			$(shell find /usr/bin -name 'php-config?*' \
				| xargs -r -n1 basename))

# Use private Go build cache
export GOCACHE = $(CURDIR)/debian/gocache

# Influcnce Python sysconfig.get_path() as called from configure so
# that the correct install paths are chosen.
export DEB_PYTHON_INSTALL_LAYOUT = deb_system

# Determine the number of builds needed due to script language version
# variants
BUILD_COUNT := $(lastword $(sort $(foreach lang,PYTHON RUBY LUA PHP,$(words $($(lang)_VERSIONS)))))
BUILDS := $(foreach n,$(wordlist 1,$(BUILD_COUNT),1 2 3 4 5 6 7 8 9),$(n))

QEMU_CPU := $(shell echo $(DEB_HOST_GNU_CPU) \
		    | sed -r \
			-e 's,i[456]86,i386,' \
			-e 's,sparc.*,sparc64,' \
			-e 's,powerpc(64.*)?,ppc64,' \
			-e 's,arm.*,arm,')

# Run "make quickcheck" only on these architectures
QUICKCHECK_ARCHITECTURES := amd64 armhf arm64 riscv64 ppc64el # s390x

# Template for generating dh_{clean,configure,build,test} overrides.
# $1 is replaced with the build number.
define DH_AUTO_TEMPLATE
override_dh_auto_clean::
	dh_auto_clean --builddir=$(CURDIR)/debian/build-$1

$(CURDIR)/debian/build-$1/config.status::
	dh_auto_configure --builddir=$(CURDIR)/debian/build-$1 \
		-- \
		--disable-gnulib-tests     \
		--with-readline	           \
		--disable-haskell          \
		--with-guestfs-path=/usr/lib/$(DEB_HOST_MULTIARCH)/guestfs \
		--with-qemu=qemu-system-$(QEMU_CPU) \
		$(if $(findstring powerpcspe,$(DEB_HOST_GNU_CPU)),\
			--with-qemu-options="-M ppce500 -cpu e500v2") \
		--with-supermin-extra-options='--use-installed' \
		$(if $(findstring $1,$(BUILD_COUNT)),\
			--enable-install-daemon \
			--with-java=/usr/lib/jvm/default-java \
			JNI_INSTALL_DIR='$$$${libdir}/jni' \
			,\
			--with-java=no --without-java \
			--disable-fuse \
			--disable-ocaml \
			--disable-perl \
			--disable-gobject \
			--disable-daemon --disable-appliance ) \
		$(if $(word $1,$(RUBY_VERSIONS)),\
			RUBY=$(word $1,$(RUBY_VERSIONS)) \
			RAKE="$(word $1,$(RUBY_VERSIONS)) -S rake" \
			,\
			--disable-ruby) \
		$(if $(word $1,$(PYTHON_VERSIONS)),\
			PYTHON=$(word $1,$(PYTHON_VERSIONS)) \
			,\
			--disable-python) \
		$(if $(word $1,$(LUA_VERSIONS)),\
			LUA=$(word $1,$(LUA_VERSIONS)) \
			,\
			--disable-lua) \
		$(if $(word $1,$(PHP_VERSIONS)),\
			PHP=$(word $1,$(PHP_VERSIONS)) \
			PHPIZE=$(subst php,phpize,$(word $1,$(PHP_VERSIONS))) \
			,\
			--disable-php)

override_dh_auto_configure:: $(CURDIR)/debian/build-$1/config.status

$(CURDIR)/debian/build-$1/build-stamp:
	dh_auto_build --builddir=$(CURDIR)/debian/build-$1 \
		-- INSTALLDIRS=vendor LD_RUN_PATH=""
	touch $$@

override_dh_auto_build:: $(CURDIR)/debian/build-$1/build-stamp

endef

$(foreach build,$(BUILDS),$(eval $(call DH_AUTO_TEMPLATE,$(build))))

output_template:
	$(foreach build,$(BUILDS),$(info $(call DH_AUTO_TEMPLATE,$(build))))

# Special Makefile magic ends here

override_dh_autoreconf:
# Get rid of files shipped in upstream tarball so they get rebuilt in
# the build directories.
	rm -f po/*.gmo po/*.pot
	dh_autoreconf -- debian/dh-autoreconf.sh

# Just run the test on the last build.
override_dh_auto_test:
ifneq "" "$(findstring x$(DEB_HOST_ARCH)x,$(patsubst %,x%x,$(QUICKCHECK_ARCHITECTURES)))"
	printenv
	mount
	unset XDG_RUNTIME_DIR; export TMPDIR=$(CURDIR)/tmp; \
		mkdir -p $(CURDIR)/tmp; \
		if ! test -w /dev/kvm; then \
			export LIBGUESTFS_BACKEND_SETTINGS=force_tcg; \
		fi; \
		make -C $(CURDIR)/debian/build-$(BUILD_COUNT) quickcheck
endif

# Installation needs to happen in order because only the last build
# contains all features.
override_dh_auto_install:
	set -e; for build in $(BUILDS); do \
		dh_auto_install --builddir=$(CURDIR)/debian/build-$$build \
			-- INSTALLDIRS=vendor; \
	done

override_dh_install:
# Split the supermin appliance packages list into subpackages, so the
# main libguestfs0 can avoid depending on everything.
	debian/split-appliance.sh

	dh_install -X.la -X.so.owner -Xbindtests -X/usr/lib/go/ -X/usr/lib/go- -Xpackages.orig -Xetc/php.d

	# Workaround for Ubuntu's strict kernel permissions
	if [ "$$(sed -ne '/^ID=/ { s/^[^=]*=//;p }' /etc/os-release)" = ubuntu ]; then \
		mkidr -p debian/libguestfs0t64/etc/kernel/preinst.d debian/libguestfs0t64/etc/kernel/postrm.d ; \
		install -m755 debian/libguestfs0t64.kernel-preinst debian/libguestfs0t64/etc/kernel/preinst.d/libguestfs0 ; \
		install -m755 debian/libguestfs0t64.kernel-postrm  debian/libguestfs0t64/etc/kernel/postrm.d/libguestfs0  ; \
		cat debian/libguestfs0t64.preinst.snippet >> debian/libguestfs0t64.preinst.debhelper ; \
		cat debian/libguestfs0t64.postrm.snippet  >> debian/libguestfs0t64.postrm.debhelper  ; \
	fi

override_dh_missing:
	dh_missing --fail-missing \
		-X.la -X.so.owner -Xbindtests -X/usr/lib/go/ -X/usr/lib/go- -Xpackages.orig -Xetc/php.d -Xguestfs-erlang.3

# Add packages (except essential packages) from appliance packagelist
# to libguestfs* dependencies
	debian/gen-appliance-depends.sh

override_dh_php:
	dh_php -p php-guestfs
override_dh_python3:
	dh_python3 -p python3-guestfs
override_dh_shlibdeps:
	dh_shlibdeps
# Add libraries needed by guestfsd to libguestfs0 dependencies
	dh_shlibdeps -p libguestfs0t64 -- -e debian/guestfsd/usr/sbin/guestfsd

# Workaround for Lintian warning
# "{pre,post}inst-has-useless-call-to-ldconfig"
override_dh_makeshlibs:
	dh_makeshlibs -X/jni/ -X/python3/
# Workaround for
# dwz: [...] DWARF version 0 unhandled
override_dh_dwz:

%:
	dh $@ \
	   --without=python-support \
	   --with=ocaml,python3,bash-completion,ruby,gir,lua,php