# Template file for 'kernel'
#
pkgname=kernel
version=3.5.2
revision=1
nostrip=yes
noverifyrdeps=yes
preserve=yes
wrksrc="linux-${version}"
depends="dracut linux-firmware module-init-tools"
makedepends="perl kmod"
subpackages="kernel-headers"
triggers="kernel-hooks"
maintainer="Juan RP <xtraeme@gmail.com>"
homepage="http://www.kernel.org"
license="GPL-2"
short_desc="The Linux kernel and modules"
long_desc="
 This package provides the linux kernel image and associated modules."
distfiles="http://www.kernel.org/pub/linux//kernel/v3.x/linux-${version}.tar.xz"
checksum=a6833d733605eae0d9fc4c277dfdb3dae5e62b5cf120bcc6d1c7828adfe9bf8d

_kernver="${version}_${revision}"

# These files could be modified when an external module is built.
mutable_files="
/usr/lib/modules/${_kernver}/modules.dep
/usr/lib/modules/${_kernver}/modules.dep.bin
/usr/lib/modules/${_kernver}/modules.symbols
/usr/lib/modules/${_kernver}/modules.symbols.bin
/usr/lib/modules/${_kernver}/modules.alias
/usr/lib/modules/${_kernver}/modules.alias.bin
/usr/lib/modules/${_kernver}/modules.devname"

do_configure() {
	# If there's a file called <arch>-dotconfig, use it to
	# configure the kernel; otherwise use arch defaults and all stuff
	# as modules (defconfig+allmodconfig).
	local arch

	if [ "$XBPS_MACHINE" != "x86_64" ]; then
		arch=i386
	else
		arch=x86_64
	fi

	if [ -f ${FILESDIR}/${arch}-dotconfig ]; then
		msg_normal "Detected a .config file for your arch, using it.\n"
		cp -f ${FILESDIR}/${arch}-dotconfig .config
		make ${makejobs} oldconfig
	else
		msg_normal "Defaulting to 'defconfig and allmodconfig'.\n"
		make ${makejobs} defconfig && make ${makejobs} allmodconfig
	fi
	# Always use our revision to CONFIG_LOCALVERSION to match our pkg version.
	sed -i -e "s|^\(CONFIG_LOCALVERSION=\).*|\1\"_${revision}\"|" .config
}

do_build() {
	make ${makejobs} prepare
	make ${makejobs} bzImage modules
}

do_install() {
	local arch hdrdest

	if [ "$XBPS_MACHINE" != "x86_64" ]; then
		arch=i386
	else
		arch=x86_64
	fi

	# Run depmod after compressing modules.
	sed -i '2iexit 0' scripts/depmod.sh

	# Install kernel, firmware and modules
	make INSTALL_MOD_PATH=${DESTDIR} modules_install

	hdrdest=${DESTDIR}/usr/src/kernel-headers-${_kernver}

	install -Dm644 .config ${DESTDIR}/boot/config-${_kernver}
	install -Dm644 arch/x86/boot/bzImage \
		${DESTDIR}/boot/vmlinuz-${_kernver}
	install -Dm644 System.map \
		${DESTDIR}/boot/System.map-${_kernver}

	# Switch to /usr.
	vmkdir usr
	vmove lib usr

	cd ${DESTDIR}/usr/lib/modules/${_kernver} && \
		rm -f source build && \
		ln -sf ../../../src/kernel-headers-${_kernver} build

	cd ${wrksrc}
	# Install required headers to build external modules
	install -Dm644 Makefile ${hdrdest}/Makefile
	install -Dm644 kernel/Makefile ${hdrdest}/kernel/Makefile
	install -Dm644 .config ${hdrdest}/.config
	mkdir -p ${hdrdest}/include
	# Remove firmware stuff provided by the "linux-firmware" pkg.
	rm -rf ${DESTDIR}/usr/lib/firmware

	for i in acpi asm-generic config generated linux math-emu media net \
		pcmcia scsi sound trace video; do
		[ -d include/$i ] && \
			cp -a include/$i ${hdrdest}/include
	done

	# Add workaround for vmware not finding kernel headers.
	cd ${hdrdest}/include/linux && \
		ln -sf ../generated/utsrelease.h . && \
		ln -sf ../generated/autoconf.h .

	cd ${wrksrc}
	mkdir -p ${hdrdest}/arch/x86
	cp -a arch/x86/include ${hdrdest}/arch/x86
	cp -a include/xen ${hdrdest}/include

	# Copy files necessary for later builds, like nvidia and vmware
	cp Module.symvers ${hdrdest}
	cp -a scripts ${hdrdest}

	mkdir -p ${hdrdest}/arch/x86/kernel
	cp arch/x86/Makefile ${hdrdest}/arch/x86
	if [ "$arch" = "i386" ]; then
		cp arch/x86/Makefile_32.cpu ${hdrdest}/arch/x86
	fi
	cp arch/x86/kernel/asm-offsets.s ${hdrdest}/arch/x86/kernel

	# Add headers for lirc package
	mkdir -p ${hdrdest}/drivers/media/video
	cp drivers/media/video/*.h \
		${hdrdest}/drivers/media/video
	for i in $(find ${hdrdest}/drivers/media/video/ -mindepth 1 -type d); do
		_dir=$(basename $i)
		mkdir -p ${hdrdest}/drivers/media/video/${_dir}
		cp -a drivers/media/video/${_dir}/*.h \
			${hdrdest}/drivers/media/video/${_dir}
	done

	# Add docbook makefile
	install -D -m644 Documentation/DocBook/Makefile \
		${hdrdest}/Documentation/DocBook/Makefile

	# Add md headers
	mkdir -p ${hdrdest}/drivers/md
	cp drivers/md/*.h ${hdrdest}/drivers/md

	# Add inotify.h
	mkdir -p ${hdrdest}/include/linux
	cp include/linux/inotify.h ${hdrdest}/include/linux

	# Add wireless headers
	mkdir -p ${hdrdest}/net/mac80211/
	cp net/mac80211/*.h ${hdrdest}/net/mac80211

	# Add dvb headers for external modules in reference to:
	# http://bugs.archlinux.org/task/9912
	mkdir -p ${hdrdest}/drivers/media/dvb/dvb-core
	cp drivers/media/dvb/dvb-core/*.h \
		${hdrdest}/drivers/media/dvb/dvb-core

	# Add dvb headers for external modules in reference to:
	# http://bugs.archlinux.org/task/11194
	mkdir -p ${hdrdest}/include/config/dvb
	cp include/config/dvb/*.h ${hdrdest}/include/config/dvb

	# Add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
	# in reference to:
	# http://bugs.archlinux.org/task/13146
	mkdir -p ${hdrdest}/drivers/media/dvb/frontends
	cp drivers/media/dvb/frontends/lgdt330x.h \
		${hdrdest}/drivers/media/dvb/frontends
	cp drivers/media/video/msp3400-driver.h \
		${hdrdest}/drivers/media/dvb/frontends

	# Add dvb headers in reference to: 
	# http://bugs.archlinux.org/task/20402
	mkdir -p ${hdrdest}/drivers/media/dvb/dvb-usb
	cp drivers/media/dvb/dvb-usb/*.h ${hdrdest}/drivers/media/dvb/dvb-usb
	mkdir -p ${hdrdest}/drivers/media/dvb/frontends
	cp drivers/media/dvb/frontends/*.h ${hdrdest}/drivers/media/dvb/frontends
	mkdir -p ${hdrdest}/drivers/media/common/tuners
	cp drivers/media/common/tuners/*.h ${hdrdest}/drivers/media/common/tuners

	# Add xfs and shmem for aufs building
	mkdir -p ${hdrdest}/fs/xfs
	mkdir -p ${hdrdest}/mm
	cp fs/xfs/xfs_sb.h ${hdrdest}/fs/xfs/xfs_sb.h

	# Add headers vor virtualbox in reference to:
	# http://bugs.archlinux.org/task/14568
	cp -a include/drm ${hdrdest}/include

	# Add headers for broadcom wl in reference to:
	# http://bugs.archlinux.org/task/14568
	cp -a include/trace ${hdrdest}/include

	# Copy in Kconfig files
	for i in $(find . -name "Kconfig*"); do
		mkdir -p ${hdrdest}/$(echo $i | sed 's|/Kconfig.*||')
		cp $i ${hdrdest}/$i
	done

	# Remove unneeded architectures
	for arch in alpha arm* avr32 blackfin cris frv h8300 \
		ia64 m* p* s* um v850 xtensa; do
		rm -rf ${hdrdest}/arch/${arch}
	done

	# Compress all modules with xz to save a few MBs.
	msg_normal "$pkgver: compressing kernel modules with xz, please wait...\n"
	find ${DESTDIR} -name '*.ko' -exec xz -9 {} \;

	# ... and run depmod again.
	depmod -b ${DESTDIR} ${_kernver}
}