First stepsdilfridge/image

Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>

1 files changed, 169 insertions, 0 deletions

diff --git a/targets/support/create-image.sh b/targets/support/create-image.sh
new file mode 100755
index 00000000..4b06a9dc
--- /dev/null
+++ b/targets/support/create-image.sh
@@ -0,0 +1,169 @@
+#!/bin/bash
+
+source ${clst_shdir}/support/functions.sh
+source ${clst_shdir}/support/filesystem-functions.sh
+
+## START RUNSCRIPT
+
+# WORK IN PROGRESS
+
+# This script takes a filesystem tree created by catalyst and converts it
+# into a readily bootable disk image for use with QEMU, cloud services, etc.
+# Things that should be configurable when it's finished:
+#   * image type (raw, qcow2, vmdk)
+#   * disk size
+#   * system partition size? filesystem?
+#   * create a blank swap partition? size?
+#   * boot loader and partition type (mbr&dos, or uefi&gpt; other combos 
+#     not supported)
+#   * start sshd?
+#   * root password or (much better) root authorized_keys
+#
+# For now support is limited to arches where cloud services exist (i.e., 
+# amd64 and arm64).
+
+# Check for our bootable disk image creation tools
+# case ${clst_hostarch} in
+# 	*)
+# 		cdmaker="mkisofs"
+# 		cdmakerpkg="app-cdr/cdrkit or app-cdr/cdrtools"
+# 		;;
+# esac
+
+# [ ! -f /usr/bin/${cdmaker} ] \
+#    && echo && echo && die \
+#    "!!! /usr/bin/${cdmaker} is not found.  Have you merged ${cdmakerpkg}?" \
+#    && echo && echo
+
+# If not volume ID is set, make up a sensible default
+if [ -z "${clst_image_volume_id}" ]
+then
+	case ${clst_image_type} in
+		gentoo-*)
+			case ${clst_hostarch} in
+				amd64)
+					clst_image_volume_id="Gentoo Linux - AMD64"
+				;;
+				arm64)
+					clst_image_volume_id="Gentoo Linux - ARM64"
+				;;
+				*)
+					clst_image_volume_id="Gentoo Linux"
+				;;
+				esac
+	esac
+fi
+
+if [ "${#clst_image_volume_id}" -gt 32 ]; then
+	old_clst_image_volume_id=${clst_image_volume_id}
+	clst_image_volume_id="${clst_image_volume_id:0:32}"
+	echo "ISO Volume label is too long, truncating to 32 characters" 1>&2
+	echo "old: '${old_clst_image_volume_id}'" 1>&2
+	echo "new: '${clst_image_volume_id}'" 1>&2
+fi
+
+if [ "${clst_fstype}" == "zisofs" ]
+then
+	mkisofs_zisofs_opts="-z"
+else
+	mkisofs_zisofs_opts=""
+fi
+
+#we want to create a checksum for every file on the iso so we can verify it
+#from genkernel during boot.  Here we make a function to create the sha512sums, and blake2sums
+isoroot_checksum() {
+	echo "Creating checksums for all files included in the iso, please wait..."
+	if [ -z "${1}" ] || [ "${1}" = "sha512" ]; then
+		find "${clst_target_path}" -type f ! -name 'isoroot_checksums' ! -name 'isolinux.bin' ! -name 'isoroot_b2sums' -exec sha512sum {} + > "${clst_target_path}"/isoroot_checksums
+		${clst_sed} -i "s#${clst_target_path}/\?##" "${clst_target_path}"/isoroot_checksums
+	fi
+	if [ -z "${1}" ] || [ "${1}" = "blake2" ]; then
+		find "${clst_target_path}" -type f ! -name 'isoroot_checksums' ! -name 'isolinux.bin' ! -name 'isoroot_b2sums' -exec b2sum {} + > "${clst_target_path}"/isoroot_b2sums
+		${clst_sed} -i "s#${clst_target_path}/\?##" "${clst_target_path}"/isoroot_b2sums
+	fi
+}
+
+run_mkisofs() {
+	if [ -n "${clst_livecd_verify}" ]; then
+		if [ "${clst_livecd_verify}" = "sha512" ]; then
+			isoroot_checksum sha512
+		elif [ "${clst_livecd_verify}" = "blake2" ]; then
+			isoroot_checksum blake2
+		else
+			isoroot_checksum
+		fi
+	fi
+	echo "Running \"mkisofs ${@}\""
+	mkisofs "${@}" || die "Cannot make ISO image"
+}
+
+# Here we actually create the ISO images for each architecture
+case ${clst_hostarch} in
+	x86|amd64)
+		# detect if an EFI bootloader is desired
+		if 	[ -d "${clst_target_path}/boot/efi" ] || \
+			[ -d "${clst_target_path}/boot/EFI" ] || \
+			[ -e "${clst_target_path}/gentoo.efimg" ]
+		then
+			if [ -e "${clst_target_path}/gentoo.efimg" ]
+			then
+				echo "Found prepared EFI boot image at \
+					${clst_target_path}/gentoo.efimg"
+			else
+				echo "Preparing EFI boot image"
+				if [ -d "${clst_target_path}/boot/efi" ] && [ ! -d "${clst_target_path}/boot/EFI" ]; then
+					echo "Moving /boot/efi to /boot/EFI"
+					mv "${clst_target_path}/boot/efi" "${clst_target_path}/boot/EFI"
+				fi
+				# prepare gentoo.efimg from clst_target_path /boot/EFI dir
+				iaSizeTemp=$(du -sk --apparent-size "${clst_target_path}/boot/EFI" 2>/dev/null)
+				iaSizeB=$(echo ${iaSizeTemp} | cut '-d ' -f1)
+				iaSize=$((${iaSizeB}+64)) # add slack, tested near minimum for overhead
+				echo "Creating loopback file of size ${iaSize}kB"
+				dd if=/dev/zero of="${clst_target_path}/gentoo.efimg" bs=1k \
+					count=${iaSize}
+				echo "Formatting loopback file with FAT16 FS"
+				mkfs.vfat -F 16 -n GENTOOLIVE "${clst_target_path}/gentoo.efimg"
+
+				mkdir "${clst_target_path}/gentoo.efimg.mountPoint"
+				echo "Mounting FAT16 loopback file"
+				mount -t vfat -o loop "${clst_target_path}/gentoo.efimg" \
+					"${clst_target_path}/gentoo.efimg.mountPoint" || die "Failed to mount EFI image file"
+
+				echo "Populating EFI image file from ${clst_target_path}/boot/EFI"
+				cp -rv "${clst_target_path}"/boot/EFI/ \
+					"${clst_target_path}/gentoo.efimg.mountPoint" || die "Failed to populate EFI image file"
+
+				umount "${clst_target_path}/gentoo.efimg.mountPoint"
+				rmdir "${clst_target_path}/gentoo.efimg.mountPoint"
+
+				echo "Copying /boot/EFI to /EFI for rufus compatability"
+				cp -rv "${clst_target_path}"/boot/EFI/ "${clst_target_path}"
+			fi
+		fi
+
+		if [ -e "${clst_target_path}/isolinux/isolinux.bin" ]; then
+			echo '** Found ISOLINUX bootloader'
+			if [ -e "${clst_target_path}/gentoo.efimg" ]; then
+			  # have BIOS isolinux, plus an EFI loader image
+			  echo '** Found GRUB2 EFI bootloader'
+				echo 'Creating ISO using both ISOLINUX and EFI bootloader'
+				run_mkisofs -J -R -l ${mkisofs_zisofs_opts} -V "${clst_iso_volume_id}" -o "${1}" -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -eltorito-platform efi -b gentoo.efimg -no-emul-boot -z "${clst_target_path}"/
+				isohybrid --uefi "${1}"
+		  else
+			  echo 'Creating ISO using ISOLINUX bootloader'
+			  run_mkisofs -J -R -l ${mkisofs_zisofs_opts} -V "${clst_iso_volume_id}" -o "${1}" -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table "${clst_target_path}"/
+			  isohybrid "${1}"
+		  fi
+		elif [ -e "${clst_target_path}/gentoo.efimg" ]; then
+			echo '** Found GRUB2 EFI bootloader'
+			echo 'Creating ISO using EFI bootloader'
+			run_mkisofs -J -R -l ${mkisofs_zisofs_opts} -V "${clst_iso_volume_id}" -o "${1}" -b gentoo.efimg -c boot.cat -no-emul-boot "${clst_target_path}"/
+		else
+			echo '** Found no known bootloader'
+			echo 'Creating ISO with fingers crossed that you know what you are doing...'
+			run_mkisofs -J -R -l ${mkisofs_zisofs_opts} -V "${clst_iso_volume_id}" -o "${1}" "${clst_target_path}"/
+		fi
+	;;
+esac
+exit  $?