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nix-configuration/bin/format-drives.sh

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#!/usr/bin/env bash
# Script to setup a drive for a brand new NixOS installation.
set -e
# Configuration parameters
ask_root_password=false # Whether to prompt for a root user password
boot_partition="" # The drive to install the bootloader to
luks_partition="" # The drive partition to create the LUKS container on
root_partition="/dev/mapper/nixos-crypt" # The partition to install NixOS to
function usage() {
echo "Usage: format-drives.sh [--boot boot-partition-path] [--luks luks-partition-path] [--ask-root-password]"
echo "Options:"
echo " -h | --help Show this help screen."
echo " -b | --boot <path> The path to the boot drive (e.g. /dev/nvme0n1p1)."
echo " -l | --luks <path> The path to the partition to create the LUKS container on (e.g. /dev/nvme0n1p2)."
echo " -a | --ask-root-password Sets a password for the root user account."
exit 2
}
while [[ $# -gt 0 ]]; do
case "$1" in
--ask-root-password|-a)
ask_root_password=true
shift
;;
--boot|-b)
boot_partition=$1
shift
;;
--luks|-l)
luks_partition=1
shift
;;
--help|-h)
usage
shift
;;
*)
break
;;
esac
done
if [ "$(id -u)" != "0" ]; then
echo "This script must be run as root" 1>&2
exit 1
fi
cryptsetup --label=nixos-crypt --type=luks2 luksFormat $luks_partition
cryptsetup luksOpen $luks_partition nixos-crypt
mkfs.btrfs -L nixos $root_partition
mount /dev/mapper/nixos-crypt /mnt
btrfs subvolume create /mnt/@
btrfs subvolume create /mnt/@home
btrfs subvolume create /mnt/@log
btrfs subvolume create /mnt/@nix
btrfs subvolume create /mnt/@swap
umount /mnt
mount -o subvol=@ $root_partition /mnt
mkdir -p /mnt/{boot,home,var/log,nix,swap}
mount $boot_partition /mnt/boot
mount -o subvol=@home $root_partition /mnt/home
mount -o subvol=@log $root_partition /mnt/var/log
mount -o subvol=@nix $root_partition /mnt/nix
mount -o subvol=@swap $root_partition /mnt/swap
echo "Disks partitioned and mounted to /mnt."
# Generate hardware-configuration.nix
nixos-generate-config --no-filesystems --dir /home/nixos
echo "Configuration files generated and saved to /home/nixos."
echo "Setup complete!"
echo "To install, set up your system's configuration files under ./hosts/yourHost and add it to flake.nix."
echo "Then, run the following command:"
echo "nixos-install --verbose --root /mnt --flake [path-to-flake.nix] $( (( ask_root_password == false )) && echo "--no-root-password" )"
exit 0