Create installer script

bin/install-nixos.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+# Script to install a brand new NixOS installation.
+# Formats the drive provided, then runs nixos-install.
+
+set -e
+
+# Configuration parameters
+ask_root_password=true	# Prompt for a root user password
+flakeDir="."			# Where the flake.nix file is stored
+boot_drive="/dev/disk/by-uuid/whatever"	# The drive to install the bootloader to
+root_drive="/dev/disk/by-id/whatever"	# The partition to install NixOS to
+
+if [ "$(id -u)" != "0" ]; then
+   echo "This script must be run as root" 1>&2
+   exit 1
+fi
+
+cryptsetup --allow-discards --label=nixos-crypt --type=luks2 luksFormat $root_drive
+cryptsetup luksOpen $root_drive nixos-crypt
+mount /dev/mapper/nixos-crypt /mnt
+mkfs.btrfs -L nixos /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_drive /mnt
+mkdir -p /mnt/{boot,home,var/log,nix,swap}
+mount $boot_drive /mnt/boot
+mount -o subvol=@home $root_drive /mnt/home
+mount -o subvol=@log $root_drive /var/log
+mount -o subvol=@nix $root_drive /mnt/nix
+mount -o subvol=@swap $root_drive /mnt/swap
+
+# Create swapfile
+btrfs filesystem mkswapfile --size $(free -h --si | grep Mem: | awk '{print $2}') --uuid clear /mnt/swap/swapfile
+
+nixos-install --verbose --root /mnt --flake $flakeDir $( (( ask_root_password == false )) && echo "--no-root-password" )
+
+exit 0
+