path := base
name := kernel
suffix := gz
version = $(if $(findstring raspberrypi,$(DESTINATION)),3.2.27,)
version_of = src/linux
latest_version = $(shell wget -q "http://www.kernel.org" -O - | egrep "http://[^\"]+3\.[0-9]+(\.[0-9]+)?.tar.bz2" | head -n 1 | sed "s/.*linux-\([0-9.]*\)\..*/\\1/")
version_base = $(word 1,$(subst ., ,$(version))).$(word 2,$(subst ., ,$(version)))
version_suffix = $(shell svn info src/linux_$(ARCH)$(if $(findstring raspberrypi,$(DESTINATION)),-raspberrypi,).config | grep Rev: | sed "s/.*: //")
image = $(if $(findstring arm,$(ARCH)),zImage,bzImage)
src_url = $(if $(findstring raspberrypi,$(DESTINATION)),https://github.com/raspberrypi/linux/tarball/rpi-3.2.27,http://www.kernel.org/pub/linux/kernel/v3.x/linux-$(version).tar.bz2)
src_suffix = $(if $(findstring raspberrypi,$(DESTINATION)),tgz,bz2)
src_files := linux aufs-standalone module-init-tools
deps := gcc mercurial patch libncurses5-dev git lzma

include ../Makefile.default
include ../Makefile.tools


all: $(name).$(suffix)

clean: _clean
	rm -rf lib
	rm -f include
	rm -rf src/linux.$(src_suffix)
	rm -rf src/linux-$(version)
	rm -rf src/aufs
	rm -rf src/aufs-$(version_base)
	rm -rf src/aufs-standalone.tgz
	rm -rf src/raspberrypi.tgz
	rm -rf src/raspberrypi
	rm -rf src/module-init-tools.tgz
	rm -rf src/module-init-tools
	rm -f $(name).$(suffix)

$(name).$(suffix): src/linux/arch/$(ARCH)/boot/$(image) lib include
	cp -up src/linux/arch/$(ARCH)/boot/$(image) $(modulname)
	ln -fs $(modulname) $@


src/linux/arch/$(ARCH)/boot/$(image): src/linux
	echo "$(indent)Build Kernel..."
	$(MAKE) -C src/linux
	touch src/linux-$(version) -r src/linux/.config

lib: src/linux $(if $(findstring raspberrypi,$(DESTINATION)),src/module-init-tools/build/depmod,)
	echo "$(indent)Build Kernel Modules..."
	rm -rf lib
	$(MAKE) -C src/linux modules
	INSTALL_MOD_PATH=$$(pwd) $(MAKE) -C src/linux modules_install
	$(depmod) -m -b . $$(ls lib/modules)
	touch src/linux-$(version) -r src/linux/.config

include: src/linux
	$(MAKE) -C src/linux headers_install
	ln -fns src/linux/usr/include include
	touch src/linux-$(version) -r src/linux/.config


src/linux: src/linux-$(version) src/linux-$(version)/.config
	ln -fns linux-$(version) $@

src/linux-$(version): src/linux.$(src_suffix) src/aufs $(if $(findstring arm,$(ARCH)),, src/bootsplash.patch)
	rm -rf $@
	tar xf src/linux.$(src_suffix) -C src
	if [ "$(DESTINATION)" = "raspberrypi" ]; then \
		mv src/raspberrypi-linux-* $@; \
	fi
	$(MAKE) patch src_path=$@ src_name=aufs/aufs3-kbuild
	$(MAKE) patch src_path=$@ src_name=aufs/aufs3-base
	$(MAKE) patch src_path=$@ src_name=aufs/aufs3-mmap
	cp -r src/aufs/{Documentation,fs,include} $@
	if [ "$(ARCH)" != "arm" ]; then \
		$(MAKE) patch src_path=$@ src_name=bootsplash; \
		$(MAKE) patch src_path=$@ src_name=hda_hdmi; \
		$(MAKE) patch src_path=$@ src_name=hid_rcking; \
	fi

src/linux.$(src_suffix):
	$(MAKE) -f ../Makefile.getfile file=$@ version=$(version) url="$(src_url)"

src/linux-$(version)/.config: src/linux_$(ARCH)$(if $(findstring raspberrypi,$(DESTINATION)),-raspberrypi,).config
	cp src/linux_$(ARCH)$(if $(findstring raspberrypi,$(DESTINATION)),-raspberrypi,)-$(version).config $@ 2>/dev/null || cp src/linux_$(ARCH)$(if $(findstring raspberrypi,$(DESTINATION)),-raspberrypi,).config $@; \
	sed "s/CONFIG_LOCALVERSION=\".*\"/CONFIG_LOCALVERSION=\"$(version_suffix)\"/" -i $@
	cd $(@D); yes "" | $(MAKE) oldconfig


src/bootsplash.patch:
	echo "Bootsplash deactivated"
#	path=$$(wget -q "http://x-softsi.com.br/site/?p=26" -O - | egrep "bootsplash-[0-9.]+-$(version_base).patch" | sed "s/.*\"\([^\"]\+$(version_base).patch\)\".*/\\1/"); \
#	$(MAKE) -f ../Makefile.getfile file=$@ version=$(version_base) url="$(test -n "$$path" && echo "http://x-softsi.com.br$$path)"


src/aufs: src/aufs-$(version_base)
	ln -fns $(^F) $@

src/aufs-$(version_base): src/aufs-standalone.tgz
	rm -rf $@*
	mkdir -p $@-src
	tar xf $^ -C $@-src
	mv $@-src/* $@
	rm -r $@-src
	touch $@
	cd $@; patch -p1 -i ../aufs_cpup.patch
	cd $@; patch -p1 -i ../aufs_create.patch
	sed 's/#define AUFS_VERSION.*/#define AUFS_VERSION   "3.x-rcN"/' -i $@/include/uapi/linux/aufs_type.h

src/aufs-standalone.tgz:
	$(MAKE) -f ../Makefile.getfile version=$(version_base) file=$@ rule=src/aufs-HEAD

src/aufs-HEAD:
	git clone git://git.code.sf.net/p/aufs/aufs3-standalone $@
#       cd $@; git checkout origin/aufs3.x-rcN
#	feste aufs-Version fuer Kernel 3.12.x vom 12.11.2013
	cd $@; git checkout 8e9c589e2184bf5622a3abd4c7654636c9f08f97
	tar -caf $(file) -C $(@D) $(@F)
	rm -rf $@


src/module-init-tools/build/depmod: src/module-init-tools
	cd $^; autoreconf -i
	cd $^; ./configure
	$(MAKE) -C $^ $(@F)

src/module-init-tools: src/module-init-tools.tgz
	rm -rf $@
	tar xf $^ -C $(@D)
	mv src/opensuse-$(@F) $@

src/module-init-tools.tgz:
	wget "http://gitorious.org/opensuse/module-init-tools/archive-tarball/master" -O /dev/null
	sleep 10
	$(MAKE) -f ../Makefile.getfile file=$@ url="http://gitorious.org/opensuse/module-init-tools/archive-tarball/master"