Clarify script purpose.

nixos-setup/compute-setup.sh

@@ -0,0 +1,56 @@
+DISK=/dev/disk/by-id/nvme-eui.002538b981b03d98
+KEY_DISK=/dev/disk/by-id/usb-Intenso_Micro_Line_22080777640496-0:0
+
+parted "$DISK" -- mklabel gpt
+
+parted -a optimal "$DISK" -- mkpart primary 512MiB -8GB
+udevadm trigger
+sleep 1
+cryptsetup -v --keyfile-size 4096 luksFormat "$DISK"-part1 $KEY_DISK
+cryptsetup open --key-file $KEY_DISK --keyfile-size 4096 "$DISK"-part1 luksroot
+mkfs.btrfs -f -L btrfs /dev/mapper/luksroot
+
+parted -a optimal "$DISK" -- mkpart primary linux-swap -8GB 100%
+
+parted -a optimal "$DISK" -- mkpart ESP fat32 1MB 512MiB
+parted "$DISK" -- set 3 esp on
+udevadm trigger
+sleep 1
+mkfs.vfat "$DISK"-part3
+
+mount /dev/mapper/luksroot /mnt
+btrfs subvolume create /mnt/root
+btrfs subvolume create /mnt/nix
+btrfs subvolume create /mnt/persist
+btrfs subvolume create /mnt/log
+btrfs subvolume snapshot -r /mnt/root /mnt/root-blank
+umount /mnt
+
+mount -o subvol=root,compress=zstd,noatime /dev/mapper/luksroot /mnt
+
+mkdir /mnt/nix
+mount -o subvol=nix,compress=zstd,noatime /dev/mapper/luksroot /mnt/nix
+
+mkdir /mnt/persist
+mount -o subvol=persist,compress=zstd,noatime /dev/mapper/luksroot /mnt/persist
+
+mkdir -p /mnt/var/log
+mount -o subvol=log,compress=zstd,noatime /dev/mapper/luksroot /mnt/var/log
+
+mkdir /mnt/boot
+mount "$DISK"-part3 /mnt/boot
+
+nixos-generate-config --root /mnt
+
+# only enable here so that it doesn't get included in hardware-configuration.nix
+mkswap -L swap "$DISK"-part2
+swapon "$DISK"-part2
+
+cp configuration.nix /mnt/etc/nixos
+
+nixos-install
+
+cp /mnt/etc/nixos/* /mnt/persist/etc/nixos
+
+echo "done!"
+