scripts/mkimage.sh: scripts to build bootable alpine images

1 files changed, 151 insertions, 0 deletions

diff --git a/scripts/mkimg.base.sh b/scripts/mkimg.base.sh
new file mode 100644
index 0000000000..db2a3b2818
--- /dev/null
+++ b/scripts/mkimg.base.sh
@@ -0,0 +1,151 @@
+build_kernel() {
+	local _flavor="$2"
+	shift 3
+	local _pkgs="$@"
+	update-kernel \
+		$_hostkeys \
+		--media \
+		--flavor "$_flavor" \
+		--arch "$ARCH" \
+		--package "$_pkgs" \
+		--feature "$initfs_features" \
+		--repositories-file "$APKROOT/etc/apk/repositories" \
+		"$DESTDIR"
+}
+
+section_kernels() {
+	local _f _a _pkgs
+	for _f in $kernel_flavors; do
+		_pkgs="linux-$_f linux-firmware"
+		for _a in $kernel_addons; do
+			_pkgs="$_pkgs $_a-$_f"
+		done
+		local id=$( (echo "$initfs_features::$_hostkeys" ; apk fetch --root "$APKROOT" --simulate alpine-base $_pkgs | sort) | checksum)
+		build_section kernel $ARCH $_f $id $_pkgs
+	done
+}
+
+build_apks() {
+	local _apksdir="$DESTDIR/apks"
+	local _archdir="$_apksdir/$ARCH"
+	mkdir -p "$_archdir"
+
+	apk fetch --root "$APKROOT" --link --recursive --output "$_archdir" $apks
+	if ! ls "$_archdir"/*.apk >& /dev/null; then
+		return 1
+	fi
+
+	apk index \
+		--description "$RELEASE" \
+		--rewrite-arch "$ARCH" \
+		--index "$_archdir"/APKINDEX.tar.gz \
+		--output "$_archdir"/APKINDEX.tar.gz \
+		"$_archdir"/*.apk
+	abuild-sign "$_archdir"/APKINDEX.tar.gz
+	touch "$_apksdir/.boot_repository"
+}
+
+section_apks() {
+	[ -n "$apks" ] || return 0
+	build_section apks $ARCH $(apk fetch --root "$APKROOT" --simulate --recursive $apks | sort | checksum)
+}
+
+build_apkovl() {
+	local _host="$1"
+	msg "Generating $_host.apkovl.tar.gz"
+	(local _pwd=$PWD; cd "$DESTDIR"; fakeroot "$_pwd"/"$apkovl" "$_host")
+}
+
+section_apkovl() {
+	[ -n "$apkovl" -a -n "$hostname" ] || return 0
+	build_section apkovl $hostname $(checksum < "$apkovl")
+}
+
+build_syslinux() {
+	local _fn
+	mkdir -p "$DESTDIR"/boot/syslinux
+	apk fetch --root "$APKROOT" --stdout syslinux | tar -C "$DESTDIR" -xz usr/share/syslinux
+	for _fn in isolinux.bin ldlinux.c32 libutil.c32 libcom32.c32 mboot.c32; do
+		mv "$DESTDIR"/usr/share/syslinux/$_fn "$DESTDIR"/boot/syslinux/$_fn || return 1
+	done
+	rm -rf "$DESTDIR"/usr
+}
+
+section_syslinux() {
+	[ "$output_format" = "iso" ] || return 0
+	build_section syslinux $(apk fetch --root "$APKROOT" --simulate syslinux | sort | checksum)
+}
+
+syslinux_gen_config() {
+	[ -z "$syslinux_serial" ] || echo "SERIAL $syslinux_serial"
+	echo "TIMEOUT ${syslinux_timeout:-20}"
+	echo "PROMPT ${syslinux_prompt:-1}"
+	echo "DEFAULT ${kernel_flavors%% *}"
+
+	local _f
+	for _f in $kernel_flavors; do
+		if [ -z "${xen_params+set}" ]; then
+			cat <<EOF
+
+LABEL $_f
+	MENU LABEL Linux $_f
+	KERNEL /boot/vmlinuz-$_f
+	INITRD /boot/initramfs-$_f
+	DEVICETREEDIR /boot/dtbs
+	APPEND $initfs_cmdline $kernel_cmdline
+EOF
+		else
+			cat <<EOF
+
+LABEL $_f
+	MENU LABEL Xen/Linux $_f
+	KERNEL /boot/syslinux/mboot.c32
+	APPEND /boot/xen.gz ${xen_params} --- /boot/vmlinuz-$_f $initfs_cmdline $kernel_cmdline --- /boot/initramfs-$_f
+EOF
+		fi
+	done
+}
+
+build_syslinux_cfg() {
+	local syslinux_cfg="$1"
+	mkdir -p "${DESTDIR}/$(dirname $syslinux_cfg)"
+	syslinux_gen_config > "${DESTDIR}"/$syslinux_cfg
+}
+
+section_syslinux_cfg() {
+	syslinux_cfg=""
+	[ ! "$output_format" = "iso" ] || syslinux_cfg="boot/syslinux/syslinux.cfg"
+	[ ! -n "$uboot_install" ] || syslinux_cfg="extlinux/extlinux.conf"
+	[ -n "$syslinux_cfg" ] || return 0
+	build_section syslinux_cfg $syslinux_cfg $(syslinux_gen_config | checksum)
+}
+
+create_image_iso() {
+	local ISO="${OUTDIR}/${output_filename}"
+	xorrisofs \
+		-o ${ISO} -l -J -R \
+		-b boot/syslinux/isolinux.bin		\
+		-c boot/syslinux/boot.cat		\
+		-V "alpine-$PROFILE $RELEASE $ARCH"	\
+		-no-emul-boot		\
+		-boot-load-size 4	\
+		-boot-info-table	\
+		-quiet			\
+		-follow-links		\
+		${iso_opts}		\
+		${DESTDIR}
+	isohybrid ${ISO}
+}
+
+create_image_targz() {
+	tar -C "${DESTDIR}" -chzf ${OUTDIR}/${output_filename} .
+}
+
+profile_base() {
+	kernel_flavors="grsec"
+	initfs_cmdline="modules=loop,squashfs,sd-mod,usb-storage quiet"
+	initfs_features="ata base bootchart cdrom squashfs ext2 ext3 ext4 mmc raid scsi usb virtio"
+	apks="alpine-base alpine-mirrors bkeymaps chrony e2fsprogs network-extras openssl openssh tzdata"
+	apkovl="genapkovl-dhcp.sh"
+	hostname="alpine"
+}