#!/usr/bin/env bash # Copyright (C) 2023 Umorpha Systems # SPDX-License-Identifier: AGPL-3.0-or-later set -euE -o pipefail v() { printf >&2 ' $ %s\n' "${*@Q}" "$@" } main() { local rootfs size case "$1" in *rootfs*) rootfs="$1" size=$(stat --format='%s' -- "$rootfs") ;; --stdin=*) rootfs=/dev/stdin size=${1#--stdin=} ;; *) echo >&2 "!! Filename '${1}' does not look like a rootfs filename" return 2 ;; esac ######################################################################## cleanup=() _do_cleanup() { if [[ $? == 0 ]]; then echo ":: Cleaning up..." else echo >&2 "!! ERROR! Cleaning up..." fi for (( i=${#cleanup[@]}-1; i >= 0; i-- )); do eval "${cleanup[$i]}" done } trap '_do_cleanup' EXIT ######################################################################## local booted other booted=$(awk '$2 == "/run/umorpha-root/root"{print $1}' "/dev/mapper/vg_umorpha-lv_root_$other" else v pv -- "$rootfs" >"/dev/mapper/vg_umorpha-lv_root_$other" fi ######################################################################## local tmpdir tmpdir="$(mktemp -dt "${0##*/}.XXXXXXXXXX")" cleanup+="rmdir -- ${tmpdir@Q}" ######################################################################## echo ":: Configuring boot" local selector_boot selector_root selector_overlay selector_root="$( blkid --output=export "/dev/mapper/vg_umorpha-lv_root_$other" | grep ^UUID=)" selector_boot="$( xargs -a /proc/cmdline printf '%s\n' | sed -n 's/^boot=//p')" selector_overlay="$(xargs -a /proc/cmdline printf '%s\n' | sed -n 's/^overlay=//p')" v declare -p selector_boot selector_root selector_overlay mkdir "$tmpdir/mnt" cleanup+=("rmdir -- ${tmpdir@Q}/mnt") v mount -o ro -- "/dev/mapper/vg_umorpha-lv_root_$other" "$tmpdir/mnt" cleanup+=("v umount ${tmpdir@Q}/mnt") v mount -o bind -- /etc/mkinitcpio.d "${tmpdir}/mnt/etc/mkinitcpio.d" cleanup+=("v umount ${tmpdir@Q}/mnt/etc/mkinitcpio.d") v mount -o bind -- /boot "${tmpdir}/mnt/boot" cleanup+=("v umount ${tmpdir@Q}/mnt/boot") { for krnl in "$tmpdir/mnt"/usr/lib/modules/*/vmlinuz; do pkgbase=$(cat -- ${krnl%vmlinuz}pkgbase) cat <<-EOF menuentry 'Parabola GNU/Linux-libre, slot ${other}, ${pkgbase} kernel' set search --no-floppy --fs-uuid --set=root ${selector_boot#UUID=} echo 'Loading ${pkgbase} kernel...' linux /vmlinuz-${pkgbase} root=$selector_root overlay=$selector_overlay boot=$selector_boot rw echo 'Loading initial ramdisk...' initrd /initramfs-${pkgbase}.img echo 'Booting...' boot EOF done } | install -Dm600 /dev/stdin "/boot/grub/grub_$other.cfg" v arch-chroot -- "$tmpdir/mnt" sh -c "printf '%s\n' usr/lib/modules/*/vmlinuz | /usr/share/libalpm/scripts/mkinitcpio install" } main "$@"