linux-yocto/scripts/package/builddeb

#!/bin/sh

builddeb 1.3

Copyright 2003 Wichert Akkerman wichert@wiggy.net

Simple script to generate a deb package for a Linux kernel. All the

complexity of what to do with a kernel after it is installed or removed

is left to other scripts and packages: they can install scripts in the

/etc/kernel/{pre,post}{inst,rm}.d/ directories (or an alternative location

specified in KDEB_HOOKDIR) that will be called on package install and

removal.

set -eu

is_enabled() { grep -q "^$1=y" include/config/auto.conf }

if_enabled_echo() { if is_enabled "$1"; then echo -n "$2" elif [ $# -ge 3 ]; then echo -n "$3" fi }

install_linux_image () { pname=$1 pdir=debian/$1

# Only some architectures with OF support have this target
if is_enabled CONFIG_OF_EARLY_FLATTREE && [ -d "${srctree}/arch/${SRCARCH}/boot/dts" ]; then
	${MAKE} -f ${srctree}/Makefile INSTALL_DTBS_PATH="${pdir}/usr/lib/linux-image-${KERNELRELEASE}" dtbs_install
fi

${MAKE} -f ${srctree}/Makefile INSTALL_MOD_PATH="${pdir}" INSTALL_MOD_STRIP=1 modules_install
rm -f "${pdir}/lib/modules/${KERNELRELEASE}/build"

# Install the kernel
if [ "${ARCH}" = um ] ; then
	mkdir -p "${pdir}/usr/lib/uml/modules"
	mv "${pdir}/lib/modules/${KERNELRELEASE}" "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}"
	mkdir -p "${pdir}/usr/bin" "${pdir}/usr/share/doc/${pname}"
	cp System.map "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}/System.map"
	cp ${KCONFIG_CONFIG} "${pdir}/usr/share/doc/${pname}/config"
	gzip "${pdir}/usr/share/doc/${pname}/config"
else
	mkdir -p "${pdir}/boot"
	cp System.map "${pdir}/boot/System.map-${KERNELRELEASE}"
	cp ${KCONFIG_CONFIG} "${pdir}/boot/config-${KERNELRELEASE}"
fi

# Not all arches have the same installed path in debian
# XXX: have each arch Makefile export a variable of the canonical image install
# path instead
case "${SRCARCH}" in
um)
	installed_image_path="usr/bin/linux-${KERNELRELEASE}";;
parisc|mips|powerpc)
	installed_image_path="boot/vmlinux-${KERNELRELEASE}";;
*)
	installed_image_path="boot/vmlinuz-${KERNELRELEASE}";;
esac
cp "$(${MAKE} -s -f ${srctree}/Makefile image_name)" "${pdir}/${installed_image_path}"

# Install the maintainer scripts
# Note: hook scripts under /etc/kernel are also executed by official Debian
# kernel packages, as well as kernel packages built using make-kpkg.
# make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and
# so do we; recent versions of dracut and initramfs-tools will obey this.
debhookdir=${KDEB_HOOKDIR:-/etc/kernel}
for script in postinst postrm preinst prerm; do
	mkdir -p "${pdir}${debhookdir}/${script}.d"

	mkdir -p "${pdir}/DEBIAN"
	cat <<-EOF > "${pdir}/DEBIAN/${script}"

	#!/bin/sh

	set -e

	# Pass maintainer script parameters to hook scripts
	export DEB_MAINT_PARAMS="\$*"

	# Tell initramfs builder whether it's wanted
	export INITRD=$(if_enabled_echo CONFIG_BLK_DEV_INITRD Yes No)

	test -d ${debhookdir}/${script}.d && run-parts --arg="${KERNELRELEASE}" --arg="/${installed_image_path}" ${debhookdir}/${script}.d
	exit 0
	EOF
	chmod 755 "${pdir}/DEBIAN/${script}"
done

}

install_linux_image_dbg () { pdir=debian/$1

# Parse modules.order directly because 'make modules_install' may sign,
# compress modules, and then run unneeded depmod.
while read -r mod; do
	mod="${mod%.o}.ko"
	dbg="${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/kernel/${mod}"
	buildid=$("${READELF}" -n "${mod}" | sed -n 's@^.*Build ID: \(..\)\(.*\)@\1/\2@p')
	link="${pdir}/usr/lib/debug/.build-id/${buildid}.debug"

	mkdir -p "${dbg%/*}" "${link%/*}"
	"${OBJCOPY}" --only-keep-debug "${mod}" "${dbg}"
	ln -sf --relative "${dbg}" "${link}"
done < modules.order

# Build debug package
# Different tools want the image in different locations
# perf
mkdir -p ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
cp vmlinux ${pdir}/usr/lib/debug/lib/modules/${KERNELRELEASE}/
# systemtap
mkdir -p ${pdir}/usr/lib/debug/boot/
ln -s ../lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/boot/vmlinux-${KERNELRELEASE}
# kdump-tools
ln -s lib/modules/${KERNELRELEASE}/vmlinux ${pdir}/usr/lib/debug/vmlinux-${KERNELRELEASE}

}

install_kernel_headers () { pdir=debian/$1 version=${1#linux-headers-}

"${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"

mkdir -p $pdir/lib/modules/$version/
ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build

}

install_libc_headers () { pdir=debian/$1

$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH=$pdir/usr

# move asm headers to /usr/include/<libc-machine>/asm to match the structure
# used by Debian-based distros (to support multi-arch)
mkdir "$pdir/usr/include/${DEB_HOST_MULTIARCH}"
mv "$pdir/usr/include/asm" "$pdir/usr/include/${DEB_HOST_MULTIARCH}"

}

package=$1

case "${package}" in -dbg) install_linux_image_dbg "${package}";; linux-image-|user-mode-linux-) install_linux_image "${package}";; linux-libc-dev) install_libc_headers "${package}";; linux-headers-) install_kernel_headers "${package}";; esac