umorpha-boxes/bin/umorpha-install

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2023-10-31 23:18:47 +00:00
#!/usr/bin/env bash
# Copyright (C) 2023 Umorpha Systems
# SPDX-License-Identifier: AGPL-3.0-or-later
set -euE -o pipefail
set -x
main() {
local device rootfs
device=$1
rootfs=$2
echo ":: Installing '${rootfs}' to '${device}'"
cleanup=()
trap 'for (( i=${#cleanup[@]}-1; i >= 0; i-- )); do eval "${cleanup[$i]}"; done' EXIT
local tmpdir
tmpdir="$(mktemp -dt "${0##*/}.XXXXXXXXXX")"
cleanup+="rmdir -- ${tmpdir@Q}"
########################################################################
if [[ -f "$device" ]]; then
echo " file '${device}' is not a block device, setting up a loopback device..."
device=$(losetup --find --show --partscan -- "$device")
echo " ... '${device}'"
cleanup+=("losetup --detach ${device@Q}")
fi
local devicep="$device"
if [[ "$devicep" == *[0-9] ]]; then
devicep+='p'
fi
########################################################################
echo ":: Setting up GPT"
dd if=/dev/zero of="$device" bs=512 count=4
cat >"$tmpdir/00-esp.conf" <<-EOF
[Partition]
Type=esp
Format=vfat
Label=Umorpha EFI System Partition
SizeMinBytes=512M
SizeMaxBytes=512M
EOF
cat >"$tmpdir/10-lvm.conf" <<-EOF
[Partition]
# https://en.wikipedia.org/w/index.php?title=User_talk:Claunia&diff=prev&oldid=1182832243
Type=E6D6D379-F507-44C2-A23C-238F2A3DF928
Label=Umorpha LVM Partition
EOF
systemd-repart \
--empty=allow --dry-run=no \
--no-pager \
--definitions="$tmpdir" \
"$device"
rm -- "$tmpdir"/*.conf
########################################################################
echo ":: Setting up LVM"
pvcreate "${devicep}2"
vgcreate vg_umorpha "${devicep}2"
cleanup+=("vgchange --activate=n vg_umorpha")
lvcreate --name=lv_root_a --size="$(stat --format='%s' -- "$rootfs")b" vg_umorpha
pv -- "$rootfs" >/dev/mapper/vg_umorpha-lv_root_a
lvcreate --name=lv_root_overlay --size=1G vg_umorpha
mkfs.ext4 /dev/mapper/vg_umorpha-lv_root_overlay
########################################################################
echo ":: Configuring boot"
local selector_boot selector_root selector_overlay
selector_boot="$( blkid --output=export "${devicep}1" | grep ^UUID=)"
selector_root="$( blkid --output=export /dev/mapper/vg_umorpha-lv_root_a | grep ^UUID=)"
selector_overlay="$(blkid --output=export /dev/mapper/vg_umorpha-lv_root_overlay | grep ^UUID=)"
mkdir "$tmpdir/root"
cleanup+=("rmdir -- ${tmpdir@Q}/root")
mount -o ro -- /dev/mapper/vg_umorpha-lv_root_a "$tmpdir/root"
cleanup+=("umount ${tmpdir@Q}/root")
mkdir "$tmpdir/overlay"
cleanup+=("rmdir -- ${tmpdir@Q}/overlay")
mount -- /dev/mapper/vg_umorpha-lv_root_overlay "$tmpdir/overlay"
cleanup+=("umount ${tmpdir@Q}/overlay")
mkdir "$tmpdir/mnt" "$tmpdir/overlay/upperdir" "$tmpdir/overlay/workdir"
cleanup+=("rmdir -- ${tmpdir@Q}/mnt")
mount -t overlay -o "lowerdir=${tmpdir}/root,upperdir=${tmpdir}/overlay/upperdir,workdir=${tmpdir}/overlay/workdir" umorpha-rootfs \
"${tmpdir}/mnt"
cleanup+=("umount ${tmpdir@Q}/mnt")
mount -- "${devicep}1" "$tmpdir/mnt/boot"
cleanup+=("umount ${tmpdir@Q}/mnt/boot")
mkdir -p "$tmpdir/mnt/etc/kernel"
echo root=$selector_root overlay_root=$selector_overlay boot=$selector_boot rw >"$tmpdir/mnt/etc/kernel/cmdline"
mkdir -p -- "$tmpdir/mnt/boot/EFI/Linux"
if ! arch-chroot -- "$tmpdir/mnt" sh -c "printf '%s\n' usr/lib/modules/*/vmlinuz | /usr/share/libalpm/scripts/mkinitcpio install"; then
pushd "$tmpdir/mnt"
urxvt
popd
fi
install -D "$tmpdir/mnt/usr/lib/systemd/boot/efi/systemd-bootx64.efi" "$tmpdir/mnt/boot/EFI/BOOT/BOOTX64.EFI"
}
main "$@"