#!/usr/bin/make -f
SHELL		:= bash

deb_version		:= $(shell dpkg-parsechangelog | sed -ne "s/^Version: \(.*\)/\1/p")
upstream_version	:= $(shell echo $(deb_version) | sed -e "s/-[^-]*$$//")

package		:= grub2

DEB_HOST_ARCH_CPU ?= $(shell dpkg-architecture -qDEB_HOST_ARCH_CPU 2>/dev/null)

DEB_STRIP_EXCLUDE := /usr/bin/grub-emu

include /usr/share/cdbs/1/rules/debhelper.mk
include /usr/share/cdbs/1/rules/patchsys-quilt.mk

CFLAGS := -g -Wall

ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
	CFLAGS += -O0
else
	CFLAGS += -O2
endif

ifneq (,$(findstring nocheck,$(DEB_BUILD_OPTIONS)))
with_check := yes
else
with_check := no
endif

CC := gcc-4.4

# Enable external modules from grub-extras.
export GRUB_CONTRIB := $(CURDIR)/debian/grub-extras

CONFIGURE = ../../configure CC=$(CC) TARGET_CC=$(CC) \
	--build=$(DEB_BUILD_GNU_TYPE) --prefix=/usr --includedir="\$${prefix}/include" \
	--mandir="\$${prefix}/share/man" --infodir="\$${prefix}/share/info" --sysconfdir=/etc --localstatedir=/var \
	--libexecdir="\$${prefix}/lib/$(package)" --srcdir=$(CURDIR) \
	--enable-grub-mkfont --disable-grub-fstest 

# autogen.sh runs util/import_gcry.py after autoconf et al, so
# conf/gcry.rmk's timestamp will be later and we need to disregard it.
AUTOGEN_FILES = configure $(filter-out conf/gcry.mk,$(wildcard conf/*.mk)) debian/grub-extras/*/conf/*.mk
AUTOGEN_DEB_FILES = docs examples manpages config templates postinst postrm dirs install

$(AUTOGEN_FILES): autogen.sh configure.ac $(filter-out conf/gcry.rmk,$(wildcard conf/*.rmk)) debian/grub-extras/*/conf/*.rmk
	sed -i configure.ac -e "s/^AC_INIT.*/AC_INIT(\[GRUB\],\[$(deb_version)\],\[bug-grub@gnu.org\])/"
	./autogen.sh

REAL_PACKAGES = grub-common grub-emu grub-pc grub-coreboot grub-efi-ia32 grub-efi-amd64 grub-ieee1275 grub-firmware-qemu grub-yeeloong

$(patsubst %,configure/%,$(REAL_PACKAGES)) :: configure/% : build/stamps/configure-%
$(patsubst %,build/%,$(REAL_PACKAGES) grub-rescue-pc) :: build/% : build/stamps/build-%

build/stamps/configure-grub-pc build/stamps/configure-grub-ieee1275 build/stamps/configure-grub-coreboot build/stamps/configure-grub-emu build/stamps/configure-grub-yeeloong: $(AUTOGEN_FILES)
	mkdir -p build/stamps $(subst build/stamps/configure-,build/,$@)
	cd $(subst build/stamps/configure-,build/,$@) && $(CONFIGURE) --with-platform=$(subst build/stamps/configure-grub-,,$@)
	touch $@

# This name scheme leaves room for things like ia64 or amd32 someday
build/stamps/configure-grub-efi-ia32: $(AUTOGEN_FILES)
	mkdir -p build/stamps $(subst build/stamps/configure-,build/,$@)
	cd $(subst build/stamps/configure-,build/,$@) && $(CONFIGURE) --with-platform=efi --target=i386-pe --program-prefix=""
	touch $@
build/stamps/configure-grub-efi-amd64: $(AUTOGEN_FILES)
	mkdir -p build/stamps $(subst build/stamps/configure-,build/,$@)
	cd $(subst build/stamps/configure-,build/,$@) && $(CONFIGURE) --with-platform=efi --target=amd64-pe --program-prefix=""
	touch $@

build/stamps/configure-grub-firmware-qemu: $(AUTOGEN_FILES)
	mkdir -p build/stamps $(subst build/stamps/configure-,build/,$@)
	cd $(subst build/stamps/configure-,build/,$@) && $(CONFIGURE) --with-platform=qemu
	touch $@

build/stamps/configure-grub-common: $(AUTOGEN_FILES)
	mkdir -p build/stamps $(subst build/stamps/configure-,build/,$@)
	cd $(subst build/stamps/configure-,build/,$@) && $(CONFIGURE)
	touch $@

build/stamps/build-grub-common build/stamps/build-grub-efi-ia32 build/stamps/build-grub-efi-amd64 build/stamps/build-grub-ieee1275 build/stamps/build-grub-coreboot build/stamps/build-grub-emu build/stamps/build-grub-yeeloong: build/stamps/build-%: build/stamps/configure-%
	$(MAKE) -C $(subst build/stamps/build-,build/,$@)
	touch $@

build/stamps/build-grub-pc: build/stamps/configure-grub-pc
	$(MAKE) -C $(subst build/stamps/build-,build/,$@)
ifeq ($(with_check), yes)
	$(MAKE) -C $(subst build/stamps/build-,build/,$@) check
endif
	touch $@

build/stamps/build-grub-firmware-qemu: build/stamps/configure-grub-firmware-qemu
	$(MAKE) -C $(subst build/stamps/build-,build/,$@)
	grub_dir=`mktemp -d` ; \
	grub_memdisk=`mktemp` ; \
	trap "rm -rf $${grub_dir} $${grub_memdisk}" EXIT HUP INT QUIT TERM ; \
	mkdir -p $${grub_dir}/boot/grub ; \
	cp debian/grub-firmware-qemu_grub.cfg $${grub_dir}/boot/grub/grub.cfg ; \
	tar -cf - -C $${grub_dir} boot > $${grub_memdisk} ; \
	$(CURDIR)/$(subst build/stamps/build-,build/,$@)/grub-mkimage \
		-O i386-qemu \
		-d $(CURDIR)/$(subst build/stamps/build-,build/,$@) \
		$(CURDIR)/$(subst build/stamps/build-,build/,$@)/*.mod \
		-m $${grub_memdisk} \
		-o $(CURDIR)/$(subst build/stamps/build-,build/,$@)/grub.bin
	touch $@

build/stamps/build-grub-rescue-pc: build/stamps/build-grub-pc
	mkdir -p build/grub-rescue-pc
	cp -a build/grub-pc/grub-mkrescue build/grub-rescue-pc/grub-mkrescue
	mkdir -p build/grub-rescue-pc/rescue-disk/boot/grub
	cp docs/grub.cfg build/grub-rescue-pc/rescue-disk/boot/grub/
	sed -i 's,^prefix=.*,prefix=$(CURDIR)/build/grub-rescue-pc,' \
		build/grub-rescue-pc/grub-mkrescue
	mkdir -p build/grub-rescue-pc/lib/grub
	rm -rf build/grub-rescue-pc/lib/grub/i386-pc
	cp -a build/grub-pc build/grub-rescue-pc/lib/grub/i386-pc
	$(CURDIR)/build/grub-rescue-pc/grub-mkrescue \
		--grub-mkimage=$(CURDIR)/build/grub-pc/grub-mkimage \
		--output=$(CURDIR)/build/grub-rescue-pc/grub-rescue-cdrom.iso \
		$(CURDIR)/build/grub-rescue-pc/rescue-disk
	# save space for floppy image
	rm -rf build/grub-rescue-pc/lib/grub/i386-pc/po
	$(CURDIR)/build/grub-rescue-pc/grub-mkrescue \
		--grub-mkimage=$(CURDIR)/build/grub-pc/grub-mkimage \
		--output=$(CURDIR)/build/grub-rescue-pc/grub-rescue-floppy.img \
		--diet \
		$(CURDIR)/build/grub-rescue-pc/rescue-disk
	touch $@

install/grub-pc install/grub-efi-ia32 install/grub-efi-amd64 install/grub-ieee1275 install/grub-coreboot install/grub-emu install/grub-yeeloong::
	$(MAKE) -C $(subst install/,build/,$@) install DESTDIR=$(CURDIR)/debian/$(subst install/,,$@)/

	# shipped with grub-common
	rm -rf $(CURDIR)/debian/$(subst install/,,$@)/etc/grub.d
	rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/{sbin,share/man/man8}/{grub-dumpbios,grub-probe,grub-mkconfig,grub-mkdevicemap,grub-ofpathname}{,.8}
	rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/{bin,share/man/man1}/{grub-bin2h,grub-mkelfimage,grub-mkfont,grub-mkimage,grub-editenv,grub-mkrescue,grub-mkrelpath,grub-script-check,grub-mkpasswd-pbkdf2}{,.1}
	rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/lib/grub/{grub-mkconfig_lib,update-grub_lib}
	rm -rf $(CURDIR)/debian/$(subst install/,,$@)/usr/share/{grub,info,locale}/
	rm -rf $(CURDIR)/debian/$(subst install/,,$@)/usr/include

	if [ "$@" = "install/grub-emu" ] ; then \
		rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/{sbin,share/man/man8}/{grub-reboot,grub-set-default}{,.8} ; \
	fi

	if [ "$@" != "install/grub-emu" ] ; then \
		for i in $(AUTOGEN_DEB_FILES) ; do \
			sed debian/$$i.in \
				-e "s/@PACKAGE@/$(subst install/,,$@)/g" \
				> debian/$(subst install/,,$@).$$i ; \
		done ; \
	fi

	# grub-pc is a bit special.  It includes a few overlays for autogen files.
	if [ "$@" = "install/grub-pc" ] ; then \
		for i in templates install dirs ; do \
			cat debian/grub-pc.$$i.in >> debian/grub-pc.$$i ; \
		done ; \
	fi

	mkdir -p $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides
	echo "$(subst install/,,$@): unstripped-binary-or-object *.mod" \
		>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@)
	cd $(CURDIR)/debian/$(subst install/,,$@) && find ./usr/lib/grub -name kernel.img \
		| sed -e "s%.*%$(subst install/,,$@): statically-linked-binary &%g" \
	>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@)
	cd $(CURDIR)/debian/$(subst install/,,$@) && find ./usr/lib/grub -name kernel.img \
		| sed -e "s%.*%$(subst install/,,$@): unstripped-binary-or-object &%g" \
	>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@)
	if [ "$@" = "install/grub-efi-amd64" ] && [ "$(DEB_HOST_ARCH_CPU)" = "i386" ] ; then \
		echo "$(subst install/,,$@): binary-from-other-architecture *.mod" \
			>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@) ; \
		cd $(CURDIR)/debian/$(subst install/,,$@) && find ./usr/lib/grub -name kernel.img \
			| sed -e "s%.*%$(subst install/,,$@): binary-from-other-architecture &%g" \
		>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@) ; \
	fi
	if [ "$@" = "install/grub-pc" ] && [ "$(DEB_HOST_ARCH_CPU)" = "i386" ] ; then \
		echo "$(subst install/,,$@): binary-from-other-architecture *efiemu64.o" \
			>> $(CURDIR)/debian/$(subst install/,,$@)/usr/share/lintian/overrides/$(subst install/,,$@) ; \
	fi

install/grub-common::
	$(MAKE) -C $(subst install/,build/,$@) install DESTDIR=$(CURDIR)/debian/$(subst install/,,$@)/
	rm -rf $(CURDIR)/debian/$(subst install/,,$@)/usr/lib/grub/{i386,powerpc,sparc64,mipsel}-*
	rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/{sbin,share/man/man8}/{update-grub,grub-install,grub-setup,grub-reboot,grub-set-default}{,.8}
	rm -f $(CURDIR)/debian/$(subst install/,,$@)/usr/share/info/dir*

clean:: debian/legacy/update-grub debian/grub-extras
	chmod +x debian/{script,grub.d/*,legacy/*}

	sed -i configure.ac -e "s/^AC_INIT.*/AC_INIT(\[GRUB\],\[0\],\[bug-grub@gnu.org\]) dnl version is filled by debian\/rules/"

	for i in $(AUTOGEN_DEB_FILES) ; do \
		rm -f debian/grub-{pc,efi-*,ieee1275,coreboot,yeeloong}.$$i ; \
	done
	-rm -rf build

	# make sure PO files are always up-to-date
	debconf-updatepo

debian/legacy/update-grub:
	@echo "Missing $@.  Try: \"bzr cat http://bzr.debian.org/bzr/pkg-grub/trunk/grub-legacy/debian/update-grub > $@\""
	exit 1

debian/grub-extras:
	@echo "Missing $@.  Try: \"mkdir -p $@; for extra in 915resolution ntldr-img zfs; do bzr export $@/\$$extra http://bzr.savannah.nongnu.org/r/grub-extras/\$$extra; done\""
	exit 1