nix/docs/install.sh

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#!/usr/bin/env bash
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#set -euo pipefail
TARGET_HOST="${1:-}"
TARGET_USER="${2:-albert}"
if [ "$(id -u)" -eq 0 ]; then
echo "ERROR! $(basename "$0") should be run as a regular user"
exit 1
fi
if [ ! -d "/tmp/nixos/git/.git" ]; then
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git clone https://git.sysctl.io/albert/nix "/tmp/nixos/git"
else
git -C "/tmp/nixos/git" pull
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fi
pushd /tmp/nixos/git
if [[ -z "$TARGET_HOST" ]]; then
echo "ERROR! $(basename "$0") requires a hostname as the first argument"
echo " The following hosts are available"
ls -1 nixos/hosts/*/default.nix | cut -d'/' -f3 | grep -v -E "iso|rpi"
exit 1
fi
if [[ -z "$TARGET_USER" ]]; then
echo "ERROR! $(basename "$0") requires a username as the second argument"
echo " The following users are available"
ls -1 nixos/users/ | grep -v -E "nixos|root"
exit 1
fi
if [ ! -e "nixos/hosts/$TARGET_HOST/disks.nix" ]; then
echo "ERROR! $(basename "$0") could not find the required nixos/$TARGET_HOST/disks.nix"
exit 1
fi
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# Create a key for encrypted swap, if needed
openssl rand -hex 512 > /etc/swap.key
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echo "WARNING! The disks in $TARGET_HOST are about to get wiped"
echo " NixOS will be re-installed"
echo " This is a destructive operation"
echo
read -p "Are you sure? [y/N]" -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
sudo true
sudo nix run github:nix-community/disko \
--extra-experimental-features "nix-command flakes" \
--no-write-lock-file \
-- \
--mode disko \
"nixos/hosts/$TARGET_HOST/disks.nix"
sudo nixos-install --no-root-password --flake ".#$TARGET_HOST"
# Rsync nix-config to the target install.
sudo mkdir -p "/mnt/etc/nixos"
sudo rsync -a --delete "/tmp/nixos/git/" "/mnt/etc/nixos/git/"
pushd "/mnt/etc/nixos/git/"
popd
# If there is a keyfile for a data disk, put copy it to the root partition and
# ensure the permissions are set appropriately.
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if [[ -f "/etc/swap.key" ]]; then
sudo cp /etc/swap.key /mnt/etc/swap.key
sudo chmod 0400 /mnt/etc/swap.key
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fi
fi