121 lines
2.8 KiB
Bash
Executable File
121 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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set -eux
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cmds=
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interactive=no
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edit_filesystem=no
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while getopts ":ifc:" opt; do
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case "${opt}" in
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i)
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interactive=yes
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;;
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c)
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cmds="${OPTARG}"
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;;
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f)
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edit_filesystem=yes
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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exit 1
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;;
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esac
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done
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shift $((OPTIND-1))
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# inject-subiquity-snap.sh $old_iso $subiquity_snap $new_iso
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OLD_ISO="$(readlink -f $1)"
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SUBIQUITY_SNAP_PATH="$(readlink -f $2)"
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SUBIQUITY_SNAP="$(basename $SUBIQUITY_SNAP_PATH)"
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NEW_ISO="$(readlink -f $3)"
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tmpdir="$(mktemp -d)"
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cd "${tmpdir}"
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_MOUNTS=()
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do_mount () {
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local mountpoint="${!#}"
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mkdir "${mountpoint}"
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mount "$@"
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_MOUNTS=("${mountpoint}" "${_MOUNTS[@]+"${_MOUNTS[@]}"}")
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}
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cleanup () {
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for m in "${_MOUNTS[@]+"${_MOUNTS[@]}"}"; do
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umount "${m}"
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done
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rm -rf "${tmpdir}"
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}
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trap cleanup EXIT
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add_overlay() {
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local lower="$1"
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local mountpoint="$2"
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local work="$(mktemp -dp "${tmpdir}")"
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local upper="$(mktemp -dp "${tmpdir}")"
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chmod go+rx "${work}" "${upper}"
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do_mount -t overlay overlay -o lowerdir="${lower}",upperdir="${upper}",workdir="${work}" "${mountpoint}"
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}
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do_mount -t iso9660 -o loop "${OLD_ISO}" old_iso
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do_mount -t squashfs old_iso/casper/installer.squashfs old_installer
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add_overlay old_installer new_installer
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CORE_SNAP="$(cd old_installer/var/lib/snapd/seed/snaps/; ls -1 core*.snap)"
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cat <<EOF > new_installer/var/lib/snapd/seed/seed.yaml
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snaps:
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- name: core
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channel: stable
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file: "${CORE_SNAP}"
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- name: subiquity
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unasserted: true
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classic: true
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file: "${SUBIQUITY_SNAP}"
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EOF
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rm -f new_installer/var/lib/snapd/seed/assertions/subiquity*.assert
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rm -f new_installer/var/lib/snapd/seed/snaps/subiquity*.snap
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cp "${SUBIQUITY_SNAP_PATH}" new_installer/var/lib/snapd/seed/snaps/
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add_overlay old_iso new_iso
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if [ "$edit_filesystem" = "yes" ]; then
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do_mount -t squashfs old_iso/casper/filesystem.squashfs old_filesystem
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add_overlay old_filesystem new_filesystem
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fi
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if [ -n "$cmds" ]; then
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bash -c "$cmds"
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fi
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if [ "$interactive" = "yes" ]; then
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bash
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fi
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if [ "$edit_filesystem" = "yes" ]; then
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rm new_iso/casper/filesystem.squashfs
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mksquashfs new_filesystem new_iso/casper/filesystem.squashfs
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fi
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rm new_iso/casper/installer.squashfs
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mksquashfs new_installer new_iso/casper/installer.squashfs
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xorriso -as mkisofs -r -checksum_algorithm_iso md5,sha1 \
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-V Ubuntu\ custom\ amd64 \
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-o "${NEW_ISO}" \
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-cache-inodes -J -l \
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-b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
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-boot-load-size 4 -boot-info-table \
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-eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot \
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-isohybrid-gpt-basdat -isohybrid-apm-hfsplus \
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-isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
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new_iso/boot new_iso
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