#!/usr/bin/make -f

EPOCH=4:
DEB_SOURCE := $(shell dpkg-parsechangelog | sed -n 's/^Source: //p')
DEB_VERSION := $(shell dpkg-parsechangelog | sed -n 's/^Version: //p')
UPSTREAM_VERSION := $(shell echo $(DEB_VERSION) | sed -r 's/[^:]+://; s/-[^-]+$$//')
SHLIBS_VERSION := 4:0.8-1~

LIB_PKGS := $(shell sed -nr 's/^Package:[[:space:]]*(lib(avutil|avcodec|avdevice|avformat|avfilter|postproc|swscale)(-extra-)?[0-9]+)[[:space:]]*$$/\1/p' debian/control)
DEV_PKGS := $(shell echo $(LIB_PKGS) | sed 's/[0-9]\+\>/-dev/g')

# Support multiple makes at once
ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
NUMJOBS = -j$(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
else
# on i386 and amd64, we query the system unless overriden by DEB_BUILD_OPTIONS
ifeq      ($(DEB_HOST_ARCH),i386)
NUMJOBS := -j$(shell getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
else ifeq ($(DEB_HOST_ARCH),amd64)
NUMJOBS := -j$(shell getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
endif
endif

include debian/confflags
OPT_FLAVORS := $(filter-out static shared, $(FLAVORS))

$(info FLAVORS = $(FLAVORS))
$(info DEB_BUILD_OPTIONS = $(DEB_BUILD_OPTIONS))
$(info CFLAGS = $(CFLAGS))
$(info LDFLAGS = $(LDFLAGS))

define dh_install_file_opt_flavor
	  grep @DEB_HOST_MULTIARCH_OPT@ < $(1).in | \
	  sed 's:@DEB_HOST_MULTIARCH_OPT@:$(DEB_HOST_MULTIARCH)/$($(2)_shlibdir):g' >> $(1)

endef

DH_INSTALL_FILES := $(foreach pkg, $(LIB_PKGS) $(DEV_PKGS), debian/$(pkg).install)
$(DH_INSTALL_FILES):
	sed 's/@DEB_HOST_MULTIARCH\(_OPT\)\?@/$(DEB_HOST_MULTIARCH)/g' $@.in > $@
	$(foreach opt_flavor,$(OPT_FLAVORS),$(call dh_install_file_opt_flavor,$@,$(opt_flavor)))

configure-%: configure-stamp-%
configure-stamp-%:
	dh_testdir
	mkdir -p debian-$*
	cd debian-$* && CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" $(CURDIR)/configure \
		$($*_build_confflags) $(extra_$*_build_confflags)
	touch $@

build-%: build-stamp-%
build-stamp-%: configure-stamp-%
	dh_testdir
	$(MAKE) -C debian-$* $(NUMJOBS) V=1
	touch $@

debian-shared/tools/qt-faststart: build-stamp-shared
	$(MAKE) -C debian-shared tools/qt-faststart V=1

build-doxy: build-doxy-stamp
build-doxy-stamp:
	dh_testdir
	doxygen
	touch $@

build: build-stamp
build-stamp: $(addprefix build-stamp-, $(FLAVORS)) debian-shared/tools/qt-faststart
	touch $@

clean:
	dh_testdir
	rm -f build-stamp $(addprefix build-stamp-, $(FLAVORS)) \
	    $(addprefix configure-stamp-, $(FLAVORS)) \
	    build-doxy-stamp
	rm -rf $(addprefix debian-, $(FLAVORS)) doxy
	dh_clean $(DH_INSTALL_FILES)

get-orig-source:
	dh_testdir
	sh debian/get-orig-source.sh -d $(SVN_VERSION)

# The trailing newline is important!
define install_flavor
	$(MAKE) -C debian-$(1) install DESTDIR=$(CURDIR)/debian/tmp \
	    mandir=$(CURDIR)/debian/tmp/usr/share/man

endef

install: build $(DH_INSTALL_FILES)
	dh_testdir
	dh_testroot
	dh_prep
	dh_installdirs -ptmp usr/src
	tar czvf debian/tmp/usr/src/libav-source.tar.gz . \
		 --exclude 'debian*' --exclude .git  --exclude .pc --exclude '*-stamp' \
		 --transform 's,^./,libav/,'
	dh_installdirs -ptmp usr/share/doc/libav/html etc
	dh_installdirs -ptmp usr/share/doc/libav-doc/html
	$(foreach flavor,$(FLAVORS),$(call install_flavor,$(flavor)))
	# don't fail on binary-indep only builds.
	[ ! -d doxy ] || cp -af doxy/html debian/tmp/usr/share/doc/libav-doc
	install -m 644 -D debian-shared/doc/*.html debian/tmp/usr/share/doc/libav/html/
	install -m 644 -D doc/avserver.conf debian/tmp/etc/
	install -m 644 -D debian-shared/tools/qt-faststart debian/tmp/usr/bin/qt-faststart
	dh_install -Xusr/share/doc/libav-doc -Xusr/share/doc/libav \
		--fail-missing --sourcedir=debian/tmp

formats.txt: install
	env LD_LIBRARY_PATH="$(LD_LIBRARY_PATH):$(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)" \
	debian/tmp/usr/bin/avconv -formats | tee $@

codecs.txt: install
	env LD_LIBRARY_PATH="$(LD_LIBRARY_PATH):$(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)" \
	debian/tmp/usr/bin/avconv -codecs | tee $@

binary-indep: build-doxy install

binary-arch: build install codecs.txt formats.txt
	dh_testdir
	dh_testroot
	dh_installman -plibav debian/qt-faststart.1
	dh_installdocs doc/optimization.txt
	dh_installdocs -A debian/README.Debian
	dh_installdocs -p libavcodec53 codecs.txt
	dh_installdocs -p libavformat53 formats.txt
	dh_installdocs -p libavcodec-dev -plibavdevice-dev \
		-plibavformat-dev -plibavfilter-dev -plibpostproc-dev \
		-plibswscale-dev -plibavutil-dev -plibav-doc \
		doc/APIchanges
	dh_installexamples -p libav-tools doc/avserver.conf debian/recordshow.sh
	dh_installexamples -p libavcodec-dev libavcodec/api-example.c
	dh_installchangelogs Changelog
	dh_lintian
	dh_link
	dh_compress
	dh_fixperms
	dh_strip --dbg-package=libav-dbg

# strict internal dependencies
	for pkg in $(LIB_PKGS); do \
	    upkg=$$(echo "$$pkg" | sed -r 's/([0-9]+)$$/-extra-\1/'); \
	    dh_makeshlibs -p"$$pkg" -V"$$pkg (>= $(DEB_VERSION)) | $$upkg (>= $(EPOCH)$(UPSTREAM_VERSION)), $$pkg (<< $(EPOCH)$(UPSTREAM_VERSION)-99) | $$upkg (<< $(EPOCH)$(UPSTREAM_VERSION).99)"; \
	done
	env LD_LIBRARY_PATH="$(LD_LIBRARY_PATH):$(CURDIR)/debian/tmp/usr/lib/$(DEB_HOST_MULTIARCH)" \
	dh_shlibdeps
# target dependencies for external packages
	for pkg in $(LIB_PKGS); do \
	    upkg=$$(echo "$$pkg" | sed -r 's/([0-9]+)$$/-extra-\1/'); \
	    dh_makeshlibs -p"$$pkg" -V"$$pkg (>= $(SHLIBS_VERSION)) | $$upkg (>= $(SHLIBS_VERSION))"; \
	done
	dh_installdeb
	dh_gencontrol -- -Vlib1394-dev="$(lib1394-dev)"
	dh_md5sums
	dh_builddeb

binary: binary-indep binary-arch

.PHONY: build $(addprefix build-, $(FLAVORS)) build-doxy \
	clean \
	configure $(addprefix configure-, $(FLAVORS)) \
	binary binary-indep binary-arch \
	install \
	get-orig-source
