#!/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 -e

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
}

create_package() {
	local pname="$1" pdir="$2"
	local dpkg_deb_opts

	mkdir -m 755 -p "$pdir/DEBIAN"
	mkdir -p "$pdir/usr/share/doc/$pname"
	cp debian/copyright "$pdir/usr/share/doc/$pname/"
	cp debian/changelog "$pdir/usr/share/doc/$pname/changelog.Debian"
	gzip -n -9 "$pdir/usr/share/doc/$pname/changelog.Debian"
	sh -c "cd '$pdir'; find . -type f ! -path './DEBIAN/*' -printf '%P\0' \
		| xargs -r0 md5sum > DEBIAN/md5sums"

	# Fix ownership and permissions
	if [ "$DEB_RULES_REQUIRES_ROOT" = "no" ]; then
		dpkg_deb_opts="--root-owner-group"
	else
		chown -R root:root "$pdir"
	fi
	chmod -R go-w "$pdir"
	# in case we are in a restrictive umask environment like 0077
	chmod -R a+rX "$pdir"
	# in case we build in a setuid/setgid directory
	chmod -R ug-s "$pdir"

	# Create the package
	dpkg-gencontrol -p$pname -P"$pdir"
	dpkg-deb $dpkg_deb_opts ${KDEB_COMPRESS:+-Z$KDEB_COMPRESS} --build "$pdir" ..
}

deploy_kernel_headers () {
	pdir=$1

	rm -rf "$pdir"

	(
		find include -type f -o -type l
		(find arch -name include -type d -print0 | \
		xargs -0 -I{} find {} -type f)
		find . -path './debian' -prune -o -path '*/.history' -prune \
		-o -path './include/*' -prune \
		-o -path './scripts/*' -prune -o -type f \
		\( -name '*.tbl' -o -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
		-print
	) > debian/hdrgenfiles
	sed -i '/\.history/d' debian/hdrgenfiles

	(
		# shellcheck disable=SC2154
		cd "$srctree"
		find . arch"/$SRCARCH" -maxdepth 1 -name Makefile\*
		find include arch"/$SRCARCH"/tools scripts -type f -o -type l
		find arch/"$SRCARCH" -name Kbuild.platforms -o -name Platform
		find arch/"$SRCARCH" -name include -o -name scripts -type d -exec find {} -type f \;
		find . -path './debian' -prune -o -path '*/.history' -prune \
		-o -path './include/*' -prune \
		-o -path './scripts/*' -prune -o -type f \
		\( -name "timeconst.bc" -o -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
			-name '*.tbl' -o -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
		-print
		(find arch tools security -name include -type d -print0 | \
		xargs -0 -I{} find {} -type f)
	) > debian/hdrsrcfiles
	sed -i '/\.history/d' debian/hdrsrcfiles

	(
		cd "$srctree"/../hobot-drivers
		find . -path './debian' -prune -o -path '*/.history' -prune \
		-o -path './include/*' -prune \
		-o -path './scripts/*' -prune -o -type f \
		\( -name "timeconst.bc" -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
			-name '*.tbl' -o -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
		-print
	) > debian/hbdrvhdrsrcfiles
	sed -i '/\.history/d' debian/hbdrvhdrsrcfiles

	destdir=$pdir/usr/src/linux-headers-$version
	desthbdrvdir=$pdir/usr/src/hobot-drivers

	mkdir -p "$destdir" "$desthbdrvdir"

	tar -c -f - -T debian/hdrgenfiles | tar -xf - -C "$destdir"
	tar -c -f - -C "$srctree" -T debian/hdrsrcfiles | tar -xf - -C "$destdir"
	tar -c -f - -C "$srctree"/../hobot-drivers -T debian/hbdrvhdrsrcfiles | tar -xf - -C "$desthbdrvdir"

	rm -f debian/hdrgenfiles debian/hdrsrcfiles debian/hbdrvhdrsrcfiles

	ln -rsf "$desthbdrvdir"/build/Kconfig "$desthbdrvdir"/Kconfig
	ln -rsf "$desthbdrvdir"/build/Makefile "$desthbdrvdir"/Makefile
	cp -a "${srctree}"/scripts "$destdir"

	# Add target `make prepare` and `make modules_install` dependencies
	cp -arf ./Module.symvers "$destdir"/
	ln -sf /boot/System.map-$version "$destdir"/System.map
	cp -arf ./scripts/module.lds "$destdir"/scripts
	cp -arf ./certs/ "$destdir"
	cp -arf ./kernel/bounds.s "$destdir"/kernel
	cp -arf ./arch/"${SRCARCH}"/kernel/vdso "$destdir"/arch/"${SRCARCH}"/kernel
	cp -arf ./arch/"${SRCARCH}"/kernel/asm-offsets.s "$destdir"/arch/"${SRCARCH}"/kernel

	# copy .config manually to be where it's expected to be
	cp "$KCONFIG_CONFIG" "$destdir"/.config

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

deploy_libc_headers () {
	pdir=$1

	rm -rf $pdir

	$MAKE -f $srctree/Makefile headers
	$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)
	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
	mkdir $pdir/usr/include/$host_arch
	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
}

version=$KERNELRELEASE
tmpdir=debian/linux-image
dbg_dir=debian/linux-image-dbg
packagename=linux-image-rdk-s100
dbg_packagename=$packagename-${version%%-DR*}-dbg

if [ "$ARCH" = "um" ] ; then
	packagename=user-mode-linux-$version
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 $ARCH in
um)
	installed_image_path="usr/bin/linux-$version"
	;;
parisc|mips|powerpc)
	installed_image_path="boot/vmlinux-$version"
	;;
*)
	installed_image_path="boot/vmlinuz-$version"
esac

BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)

# Setup the directory structure
rm -rf "$tmpdir" "$dbg_dir" debian/files
mkdir -m 755 -p "$tmpdir/DEBIAN"
mkdir -p "$tmpdir/lib" "$tmpdir/boot"

# Install the kernel
if [ "$ARCH" = "um" ] ; then
	mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename"
	cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
	cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config"
	gzip "$tmpdir/usr/share/doc/$packagename/config"
else
	cp System.map "$tmpdir/boot/System.map-$version"
	cp $KCONFIG_CONFIG "$tmpdir/boot/config-$version"
fi

cp "$($MAKE -s -f $srctree/Makefile image_name)" "$tmpdir/$installed_image_path"

$MAKE -f $srctree/Makefile INSTALL_DTBS_PATH="$tmpdir/boot/" dtbs_install

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

if is_enabled CONFIG_MODULES; then
	INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_install
	rm -f "$tmpdir/lib/modules/$version/build"
	rm -f "$tmpdir/lib/modules/$version/source"
	if [ "$ARCH" = "um" ] ; then
		mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
		rmdir "$tmpdir/lib/modules/$version"
	fi
	if [ -n "$BUILD_DEBUG" ] ; then
		for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do
			module=lib/modules/$module
			mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module)
			# only keep debug symbols in the debug file
			$OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module
			# strip original module from debug symbols
			$OBJCOPY --strip-debug $tmpdir/$module
			# then add a link to those
			$OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module
		done

		# resign stripped modules
		if is_enabled CONFIG_MODULE_SIG_ALL; then
			INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_sign
		fi
	fi
fi

# 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 "$tmpdir$debhookdir/$script.d"
	cat <<EOF > "$tmpdir/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)

cur_f_path="\$0"
cur_f_name="\${cur_f_path##*/}"

if [ -L /dev/block/platform/by-name/boot_cur ];then
	resize2fs /dev/block/platform/by-name/boot_cur > /dev/null 2>&1
fi

if [ "\${cur_f_name}" = "preinst" ];then
	if [ -f /run/rdk-s100-upgrade-cancelled ]; then
		rm -f /run/rdk-s100-upgrade-cancelled
		echo "Installation cancelled: hobot-miniboot upgrade was rejected."
		echo "安装已取消：hobot-miniboot 升级被拒绝，同步取消本次安装。"
		exit 1
	fi
	echo "INFO: Removing obsolete $packagename ..."
	for file in /boot/*;do
		if [ -f "\${file}" ];then
			if [ "\${file%%-*}" != "\${file}" ] && [ "\${file#*-}" != "$version" ];then
				rm -vf "\${file}"
			fi
		fi
	done
fi

test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d

sync

exit 0
EOF
	chmod 755 "$tmpdir/DEBIAN/$script"
done

if [ "$ARCH" != "um" ]; then
	if is_enabled CONFIG_MODULES; then
		:
		deploy_kernel_headers debian/linux-headers
		create_package linux-headers-${version%%-DR*} debian/linux-headers
	fi

	deploy_libc_headers debian/linux-libc-dev
	create_package linux-libc-dev debian/linux-libc-dev
fi

# Add extlinux.conf to linux-image debian package
mkdir -p "$tmpdir"/boot/extlinux/
cp -f "$srctree"/scripts/package/rdk_extlinux "$tmpdir"/boot/extlinux/extlinux.conf
eval "sed -i 's/KERNEL_VERSION/${version}/' $tmpdir/boot/extlinux/extlinux.conf"

create_package "$packagename" "$tmpdir"

if [ -n "$BUILD_DEBUG" ] && [ "${BUILD_LINUX_DEBUG_DEB-false}" = "true" ]; then
	# Build debug package
	# Different tools want the image in different locations
	# perf
	mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
	cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
	# systemtap
	mkdir -p $dbg_dir/usr/lib/debug/boot/
	ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version
	# kdump-tools
	ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$version
	create_package "$dbg_packagename" "$dbg_dir"
fi

exit 0
