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#!/usr/bin/env nix-shell
#!nix-shell -i zsh --packages rsync zsh
setopt ERR_EXIT NO_UNSET PIPE_FAIL
# load module to parse command line arguments
zmodload zsh/zutil
# parse any possible additional drive declarations
zparseopts -D -E -A opts -- -skip-disko h x
# enable XTRACE shell option for full debugging output of scripts
if (( ${+opts[-x]} )); then
set -x
fi
DIR="${0:h}"
TARGET_HOST="${1:-}"
if [[ -z "${TARGET_HOST}" ]] || (( ${+opts[-h]} )); then
<<EOF >&2
usage: ${0:t} [ --skip-disko ] [ -h ] [ -x ] host
--skip-disko skip running presumably already run disko step
-h this message
-x enable shell debug
host the host to install from our flake
EOF
exit 1
fi
if [[ "${USERNAME}" != "nixos" ]]; then
echo "ERROR! ${0:t} should be run as the nixos user from a NixOS installer." >&2
exit 1
fi
if [[ -z "$TARGET_HOST" ]]; then
echo "ERROR! ${0:t} requires a hostname as the first argument." >&2
exit 1
fi
if [[ ! -e "${DIR}/../hosts/${TARGET_HOST}/disks.nix" ]]; then
echo "ERROR! ${0:t} could not find the required ${DIR}/../hosts/${TARGET_HOST}/disks.nix." >&2
exit 1
fi
# Check if the machine we're provisioning is using an encrypted pool.
# If it does, prompt for the passphrase, and write to a known location.
if grep -q "data.keyfile" "${DIR}/../hosts/${TARGET_HOST}/disks.nix"; then
while true; do
echo -en "\n${TARGET_HOST} uses ZFS encryption. Enter a passphrase to encrypt your pool: "
read -s pass
echo
if [[ "${#pass}" -lt 8 ]]; then
echo 'ERROR! Passphrase must be at least 8 characters.' >&2
continue
fi
echo -n "Re-enter passphrase: "
read -s pass2
echo
if [[ "${pass}" != "${pass2}" ]]; then
echo 'ERROR! Passphrases must match.' >&2
continue
else
break
fi
done
echo -n "${pass}" > /tmp/data.keyfile && chmod 00600 /tmp/data.keyfile
fi
<<EOF
++++++++ The disk(s) in ${TARGET_HOST} are about to get wiped!
WARNING! NixOS will be re-installed on ${TARGET_HOST}.
++++++++ This is a destructive operation!!!
EOF
read -q '?Are you sure? [y/N] '
echo
if [[ "${REPLY}" == "y" ]]; then
sudo true
if (( ! ${+opts[--skip-disko]} )); then
sudo nix --experimental-features "nix-command flakes" \
run github:nix-community/disko \
-- \
--mode destroy,format,mount \
"${DIR}/../hosts/${TARGET_HOST}/disks.nix"
fi
# rsync NixOS configuration to target host file system and install the system
if [[ ! -d /mnt/etc/nixos ]]; then
sudo mkdir -p /mnt/etc/nixos
fi
sudo rsync -a --delete --exclude .git "${DIR}/.." /mnt/etc/nixos
cd /mnt/etc/nixos
sudo nixos-install --flake ".#${TARGET_HOST}"
if [[ "${?}" -eq 0 ]]; then
cd
for i in $(awk -F: '{if ($3 >= 1000 && $3 <= 30000) print $1}' /mnt/etc/passwd); do
read -q "?Do you want to set a password for the user ${i}? [y/N] "
echo
if [[ "${REPLY}" == "y" ]]; then
sudo chroot /mnt /$(find /mnt/nix/store/*-shadow-*/bin/passwd -executable -name passwd | cut -d/ -f3- | head -1) ${i}
fi
echo
done
echo 'Unmounting file systems...' >&2
mount | grep -v zfs | awk '$3 ~ /^\/mnt\// {print $3}' | xargs -i{} sudo umount -lf {}
echo 'Unmounting ZFS file systems...' >&2
while ! sudo umount -t zfs -a; do echo 'attempting to umount all ZFS file systems' >&2; sleep 1; done
echo 'Exporting zpool...' >&2
while ! sudo zpool export -a; do echo 'attempting to export all zpools' >&2; sleep 1; done
echo 'Type reboot when ready.' >&2
fi
fi
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