#!/usr/bin/make -f
SHELL = /bin/sh -e

# get DEB_VERSION
include /usr/share/dpkg/pkg-info.mk
# get DEB_HOST_ARCH DEB_HOST_ARCH_OS DEB_HOST_GNU_TYPE DEB_BUILD_GNU_TYPE
include /usr/share/dpkg/architecture.mk
# get CFLAGS LDFLAGS etc
include /usr/share/dpkg/buildflags.mk

ifeq ($(shell dpkg-vendor --derives-from Ubuntu && echo yes),yes)
VENDOR := UBUNTU
DEB_BUILD_PARALLEL = yes
else
VENDOR := DEBIAN
endif

# support parallel build using DEB_BUILD_OPTIONS=parallel=N
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
  MAKEFLAGS += -j$(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
endif

# verbose build
V ?= 1

# list of packages we're supposed to build
BUILD_PACKAGES = $(call dpkg_late_eval,BUILD_PACKAGES,dh_listpackages)

enable_system = $(if $(filter qemu-system,${BUILD_PACKAGES}),enable,disable)
enable_linux_user = $(if $(filter qemu-user,${BUILD_PACKAGES}),enable,disable)

DATAPATH = /usr/share/qemu:/usr/share/seabios:/usr/lib/ipxe/qemu

# we add another set of configure options from debian/control
common_configure_opts = \
	--with-pkgversion="Debian $(DEB_VERSION)" \
	--extra-cflags="$(CFLAGS) $(CPPFLAGS) -DCONFIG_QEMU_DATAPATH='\"${DATAPATH}\"' -DVENDOR_$(VENDOR)" \
	--extra-ldflags="$(LDFLAGS) -Wl,--as-needed" \
	--prefix=/usr \
	--sysconfdir=/etc \
	--libexecdir=/usr/lib/qemu \
	--localstatedir=/var \
	--disable-blobs \
	--disable-strip \
	--with-system-pixman \
	--interp-prefix=/etc/qemu-binfmt/%M \
	--localstatedir=/var \

# Cross compiling support
ifneq ($(DEB_BUILD_GNU_TYPE), $(DEB_HOST_GNU_TYPE))
common_configure_opts  += --cross-prefix=$(DEB_HOST_GNU_TYPE)-
endif

ifeq (${enable_system},enable)

# list of system (softmmu) targets, from ./configure
system_targets = \
 i386 x86_64 alpha aarch64 arm cris lm32 m68k microblaze microblazeel \
 mips mipsel mips64 mips64el moxie or32 ppc ppcemb ppc64 sh4 sh4eb \
 sparc sparc64 s390x xtensa xtensaeb unicore32

# qemu-system subpackages, from d/control
sys_systems = arm mips ppc sparc x86
systems = ${sys_systems} misc
sysarch_arm   = $(filter aarch64 arm,${system_targets})
sysarch_mips  = $(filter mips mipsel mips64 mips64el,${system_targets})
sysarch_ppc   = $(filter ppc ppc64 ppcemb,${system_targets})
sysarch_sparc = $(filter sparc sparc64,${system_targets})
sysarch_x86   = $(filter i386 x86_64,${system_targets})
sysarch_misc  = $(filter-out $(foreach s,${sys_systems},${sysarch_$s}),${system_targets})

else

systems =

endif # enable_system

ifeq (${enable_linux_user},enable)

# list of linux-user targets, from ./configure
user_targets = \
 i386 x86_64 alpha aarch64 arm armeb cris m68k microblaze microblazeel \
 mips mipsel mips64 mips64el mipsn32 mipsn32el or32 \
 ppc ppc64 ppc64abi32 ppc64le sh4 sh4eb sparc sparc64 sparc32plus \
 unicore32 s390x

endif	# enable_linux_user

configure-stamp: configure
	dh_testdir

	# system build
	rm -rf qemu-build; mkdir qemu-build
	cd qemu-build && \
	    ../configure ${common_configure_opts} --disable-user \
		--${enable_system}-system \
		--${enable_linux_user}-linux-user \
		$(shell sh debian/extract-config-opts \
		    $(DEB_HOST_ARCH_OS)-$(DEB_HOST_ARCH) debian/control) \
		$(QEMU_CONFIGURE_OPTIONS) || \
	 { echo ===== CONFIGURE FAILED ===; tail -n 50 config.log; exit 1; }

ifeq ($(enable_linux_user),enable)
# do not use debian/configure-opts here, all optional stuff will be enabled
# automatically, dependencies are already verified in the main build
	rm -rf user-static-build; mkdir user-static-build
	cd user-static-build && \
	    ../configure ${common_configure_opts} \
		--static --disable-system \
		--target-list="$(addsuffix -linux-user,${user_targets})"
endif
	touch $@

build: build-arch build-indep
build-arch: build-stamp
build-indep: build-stamp
build-stamp: configure-stamp
	dh_testdir

	# system and utils build
	$(MAKE) -C qemu-build V=${V}
ifeq (${enable_system},enable)
	dtc -o qemu-build/pc-bios/bamboo.dtb pc-bios/bamboo.dts
endif

ifeq ($(enable_linux_user),enable)
	# user-static build
	# we use this invocation to build just the binaries
	$(MAKE) -C user-static-build V=${V} $(foreach t,${user_targets},subdir-${t}-linux-user)
endif
	touch $@

clean:	debian/control
	dh_testdir
	rm -rf qemu-build user-static-build
	rm -f configure-stamp build-stamp
	find scripts/ -name '*.pyc' -delete || :
	dh_clean

# define ${ai} variable to be one of -i (indep), -a (arch) or nothing (both)
ai :=
binary-indep: ai := -i
binary-indep: install
binary-arch: ai := -a
binary-arch: install
binary: install

define inst-system
# remove alternatives handling for jessie+1
# remove alternatives in system-$1 for testing->jessie upgrade path
	sed 's/@ARCH@/${sysarch_$1}/' debian/qemu-system-alternatives.in > debian/qemu-system-$1.postinst.debhelper
	mkdir -p debian/qemu-system-$1/usr/share/man/man1 debian/qemu-system-$1/usr/bin
	for t in ${sysarch_$1}; do \
	    mv debian/tmp/usr/bin/qemu-system-$$t debian/qemu-system-$1/usr/bin/; \
	    echo ".so man1/qemu-system.1" > debian/qemu-system-$1/usr/share/man/man1/qemu-system-$$t.1; \
	done
	echo sysarch:$1=${sysarch_$1} > debian/qemu-system-$1.substvars
	echo sysprovides:$1=${addprefix qemu-system-,${filter-out $1,${sysarch_$1}}} | \
	  sed -e 's/ /, /g' -e 'y/_/-/' >> debian/qemu-system-$1.substvars
	dh_link -pqemu-system-$1 usr/share/doc/qemu-system-common usr/share/doc/qemu-system-$1/common

endef

install: build-stamp
	dh_testdir
	dh_testroot
	dh_prep
	dh_installdirs -a

	# system and utils install
	$(MAKE) -C qemu-build DESTDIR=$(CURDIR)/debian/tmp install

ifeq (${enable_system},enable)

	# qemu-system subpackages
	mv debian/tmp/usr/share/man/man1/qemu.1 debian/tmp/usr/share/man/man1/qemu-system.1
	$(foreach s,${systems},$(call inst-system,$s))
# remove alternatives handling for jessie+1
# remove alternatives in qemu-system (metapkg) for wheezy->jessie upgrade path
	sed 's/@ARCH@/${system_targets}/' debian/qemu-system-alternatives.in > debian/qemu-system.postinst.debhelper

ifeq ($(DEB_HOST_ARCH_OS),linux)

# /usr/bin/kvm compat script.  This needs some more work for other arches
# How about a manpage for it?
ifneq ($(filter $(DEB_HOST_ARCH),amd64 i386),)
	dh_install -pqemu-kvm debian/kvm /usr/bin/
	dh_install -pqemu-kvm debian/kvm.1 /usr/share/man/man1/
ifeq ($(VENDOR),UBUNTU)
# on ubuntu there was kvm-spice package/binary which was used in libvirt xml
	dh_link -pqemu-kvm usr/bin/kvm usr/bin/kvm-spice \
		usr/bin/qemu-system-x86_64 usr/bin/qemu-system-x86_64-spice
endif
endif
ifeq ($(VENDOR),UBUNTU)
# apport hook is ubuntu-specific
	dh_install -pqemu-system-common debian/source_qemu.py \
		usr/share/apport/package-hooks/
endif

# virtfs-proxy-helper and qemu-bridge-helper are linux-specific
	for f in usr/bin/virtfs-proxy-helper \
	         usr/share/man/man1/virtfs-proxy-helper.1 \
		 usr/lib/qemu/qemu-bridge-helper \
	; do \
	  mkdir -p debian/qemu-system-common/$${f%/*} ; \
	  mv debian/tmp/$$f debian/qemu-system-common/$$f ; \
	done

endif # linux

endif # enable_system

ifeq ($(enable_linux_user),enable)
	# qemu-user
	mkdir -p debian/qemu-user/usr/bin debian/qemu-user/usr/share/man/man1
	for t in ${user_targets}; do \
	    mv debian/tmp/usr/bin/qemu-$$t \
		debian/qemu-user/usr/bin ; \
	    ln -s qemu-user.1 \
		debian/qemu-user/usr/share/man/man1/qemu-$$t.1 ; \
	done

	# qemu-user-static
	mkdir -p debian/qemu-user-static/usr/bin debian/qemu-user-static/usr/share/man/man1
	for t in ${user_targets}; do \
	    cp -p user-static-build/$$t-linux-user/qemu-$$t \
		debian/qemu-user-static/usr/bin/qemu-$$t-static ; \
	    ln -s qemu-user-static.1 \
		    debian/qemu-user-static/usr/share/man/man1/qemu-$$t-static.1 ; \
	done

	# binfmt support
	for x in postinst prerm; do \
	    sed -e s/@SUFFIX@/-static/ -e s/@PACKAGE@/qemu-user-static/ \
		debian/binfmt-update-in >> debian/qemu-user-static.$$x.debhelper ; \
	    sed -e s/@SUFFIX@// -e s/@PACKAGE@/qemu-user-binfmt/ \
		debian/binfmt-update-in >> debian/qemu-user-binfmt.$$x.debhelper ; \
	done

endif	# enable_linux_user

# install whole thing so --list-missing works right
	dh_install --list-missing
# install the rest for arch/indep as needed
	dh_installdocs ${ai} -Nqemu-user-binfmt
	dh_installchangelogs ${ai} -Nqemu-user-binfmt Changelog
	dh_installdocs ${ai} -pqemu-user-binfmt --link-doc=qemu-user
	dh_installman ${ai}
	dh_installudev ${ai}
ifneq (${ai},-i)	# do not run this for binary-indep
ifeq (${enable_system},enable)
# qemu-ifup is arch-specific
	install -D debian/qemu-ifup.$(DEB_HOST_ARCH_OS) \
		debian/qemu-system-common/etc/qemu-ifup
ifneq ($(filter $(DEB_HOST_ARCH),amd64 i386),)
# we load kvm module only on x86 (modern kernels don't need even that),
# and we don't want to fail installation if module can't be loaded
# remoe past jessie (and maybe for jessie too)
	dh_installinit -pqemu-system-x86 --no-restart-on-upgrade --error-handler=: -- start 20 S .
endif
endif
	dh_installinit -pqemu-guest-agent
endif
	dh_link ${ai}
	dh_strip ${ai}
	dh_compress ${ai}
	dh_fixperms ${ai}
	dh_installdeb ${ai}
	dh_shlibdeps ${ai}
ifeq ($(enable_linux_user),enable)
# after shlibdeps finished, grab ${shlibs:Depends} from -user package
# and transform it into Built-Using field for -user-static.
# See also dpkg-query bug #588505
	if [ -f debian/qemu-user.substvars ]; then \
	  pkgs=$$(sed -n -e's/([^)]*)//g' -e's/,//g' -e's/^shlibs:Depends=//p' debian/qemu-user.substvars); \
	  srcs=; for p in $$pkgs; do \
	    srcs="$$srcs $$(dpkg-query -f '$${source:Package} (= $${source:Version}),' -W $$p)"; \
	  done ; \
	  echo "built-using=$$srcs" >> debian/qemu-user-static.substvars ; \
	fi
endif
	dh_gencontrol ${ai}
	dh_md5sums ${ai}
	dh_builddeb ${ai}

ifneq (,$(wildcard debian/control-in))
# only include rules for debian/control if debian/control-in is present
debian/control: debian/control-in debian/rules
	sed -e 's/^:$(shell echo ${VENDOR} | tr '[A-Z]' '[a-z]')://' \
		-e '/^:[a-z]*:/D' $< > $@.tmp
	mv -f $@.tmp $@
endif

get-orig-source:
	./debian/get-orig-source.sh ${DEB_VERSION}

.PHONY: build clean binary-indep binary-arch binary install get-orig-source