path := base
name := kernel
suffix := gz
version_base = $(word 1,$(subst ., ,$(kernel_version))).$(word 2,$(subst ., ,$(kernel_version)))$(if $(filter 3.%, $(kernel_version)),,.$(word 3,$(subst ., ,$(kernel_version))))
#version_base = $(word 1,$(subst ., ,$(kernel_version))).$(word 2,$(subst ., ,$(kernel_version))).$(word 3,$(subst ., ,$(kernel_version)))
modul_version = $(shell { test -x src/linux/.config && svn info src/linux/.config 2>/dev/null || svn info src/.config 2>/dev/null; } | grep Rev: | sed "s/.*: //")
kernel_version = $(shell readlink src/linux | sed "s/.*-\|\///g")
ifeq ($(kernel_version),)
  kernel_version = $(shell GET "http://www.kernel.org" | egrep "http://[^\"]+2.6.[0-9]+(.[0-9]+)?.tar.bz2" | head -n 1 | sed "s/.*linux-\([0-9.]*\)\..*/\\1/")
endif
version := $(kernel_version).$(modul_version)
deps := gcc mercurial patch libncurses5-dev git


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


all: $(name).$(suffix)

clean: _clean
	rm -rf lib
	rm -f include
	rm -rf src/linux-$(kernel_version)
	rm -f $(name).$(suffix)

$(name).$(suffix): src/linux/arch/x86/boot/bzImage lib include
	cp -up src/linux/arch/x86/boot/bzImage $(modulname)
	ln -fs $(modulname) $@


src/linux/arch/x86/boot/bzImage: src/linux
	echo "$(indent)Build Kernel..."
	$(MAKE) -C src/linux
	touch src/linux-$(kernel_version) -r src/linux/.config

lib: src/linux
	echo "$(indent)Build Kernel Modules..."
	rm -rf lib
	$(MAKE) -C src/linux modules
	INSTALL_MOD_PATH=$$(pwd) $(MAKE) -C src/linux modules_install
	touch src/linux-$(kernel_version) -r src/linux/.config

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

src/linux: src/linux-$(kernel_version) src/linux-$(kernel_version)/.config
	ln -fs linux-$(kernel_version) $@


src/linux-$(kernel_version): src/linux-$(kernel_version).tar.bz2 src/bootsplash-$(version_base).patch src/aufs-$(version_base)
	rm -rf $@
	cd src; tar xf linux-$(kernel_version).tar.bz2
	cd $@; patch -p1 -i ../bootsplash-$(version_base).patch
	cd $@; patch -p1 -i ../aufs-$(version_base)/aufs2-kbuild.patch
	cd $@; patch -p1 -i ../aufs-$(version_base)/aufs2-base.patch
	cp -r src/aufs-$(version_base)/{Documentation,fs,include} src/linux-$(kernel_version)


src/linux-$(kernel_version)/.config: src/.config
	cp src/.config-$(kernel_version) $@ 2>/dev/null || ( cp src/.config $@; cd $(@D); yes "" | $(MAKE) oldconfig )
	sed "s/CONFIG_LOCALVERSION=\".*\"/CONFIG_LOCALVERSION=\".$(modul_version)\"/" -i $@

src/linux-%.tar.bz2:
	wget "http://www.kernel.org/pub/linux/kernel/v2.6/$(@F)" -O $@

src/linux-3.0.tar.bz2: src/linux-2.6.39.tar.bz2
	cd src; tar xf linux-2.6.39.tar.bz2
	cd src/linux-2.6.39; patch -p1 -i ../linux-3.0.patch
	mv src/linux-2.6.39 src/linux-3.0
	cd src; tar cjf $(@F) linux-3.0
	rm -r src/linux-3.0


src/bootsplash-$(version_base).patch:
	wget "http://x-softsi.com.br$$(GET "http://x-softsi.com.br/site/?p=26" | egrep "bootsplash-[0-9.]+-$(version_base).patch" | sed "s/.*\"\([^\"]\+$(version_base).patch\)\".*/\\1/")" -O $@


src/aufs-$(version_base):
	rm -rf $@
	git clone http://git.c3sl.ufpr.br/pub/scm/aufs/aufs2-standalone.git $@
#	cd $@; git checkout origin/aufs2-$(word 3,$(subst ., ,$(kernel_version)))
	cd $@; git checkout origin/aufs2.1
	cd $@; patch -p1 -i ../aufs.patch