Add installation and backup scripts

Makefile

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+switch:
+	sudo nixos-rebuild switch --flake .
+
+update:
+	nix flake update .
+
+upgrade:
+	make update && make switch
+
+install:
+	./scripts/install.sh
+
+backup:
+	./scripts/backup.sh
+
+.DEFAULT_GOAL := switch

scripts/backup.sh

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+#!/bin/sh
+
+wifi_backup() {
+    zip /tmp/iwd-networks.zip /var/lib/iwd
+    scp /tmp/iwd-networks.zip zion:/vault/backups/panacea/iwd
+}
+
+wifi_backup

scripts/install.sh

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+#!/bin/sh
+
+partition_disk() {
+    parted "$DISK" -- mklabel gpt
+    parted "$DISK" -- mkpart ESP fat32 1MiB 512MiB
+    parted "$DISK" -- mkpart primary 512MiB 100%
+    parted "$DISK" -- set 1 boot on
+    mkfs.fat -F32 -n BOOT "$DISK"p1
+}
+
+create_directories() {
+    mkdir /mnt
+    mkdir -p /mnt/boot
+    mkdir -p /mnt/home/coolneng
+    mkdir -p /mnt/home/coolneng/Downloads
+    mkdir -p /mnt/nix
+    mkdir -p /mnt/tmp
+}
+
+zfs_setup() {
+    zpool create -f -o ashift=13 -O acltype=posixacl -O relatime=on \
+        -O xattr=sa -O dnodesize=legacy -O normalization=formD -O mountpoint=none \
+        -O canmount=off -O devices=off -R /mnt -O compression=zstd -O encryption=aes-256-gcm \
+        -O keyformat=passphrase -O keylocation=prompt syscea "$DISK"p2
+    zfs create -o mountpoint=none syscea
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false syscea/ephemeral
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false syscea/ephemeral/nix
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false -o sync=disabled -o setuid=off syscea/ephemeral/tmp
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false syscea/stateful
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=true syscea/stateful/home
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false syscea/stateful/home/downloads
+    zfs create -o mountpoint=legacy -o com.sun:auto-snapshot=false syscea/stateful/root
+    zfs create -V 6G -b "$(getconf PAGESIZE)" -o compression=zle -o logbias=throughput -o sync=always \
+        -o primarycache=metadata -o secondarycache=none -o com.sun:auto-snapshot=false syscea/ephemeral/swap
+    mkswap -f /dev/zvol/syscea/swap && swapon /dev/zvol/syscea/swap
+}
+
+mount_datasets() {
+    mount "$DISK"p1 /mnt/boot
+    mount -t zfs syscea/stateful/root /mnt
+    mount -t zfs syscea/stateful/home /mnt/home/coolneng
+    mount -t zfs syscea/stateful/home/downloads /mnt/home/coolneng/Downloads
+    mount -t zfs syscea/ephemeral/nix /mnt/nix
+    mount -t zfs syscea/ephemeral/tmp /mnt/tmp
+}
+
+install_system() {
+    nix-shell -p git nixFlakes --command "nixos-install --root /mnt --flake ."
+    passwd
+    passwd coolneng
+}
+
+deploy_dotfiles() {
+    chown -R coolneng:users /mnt/home/coolneng
+    git clone https://git.coolneng.duckdns.org/coolneng/dotfiles /mnt/home/coolneng/.dotfiles
+    git clone https://git.coolneng.duckdns.org/coolneng/doom.d /mnt/home/coolneng/.doom.d
+    git clone https://git.coolneng.duckdns.org/coolneng/pass /mnt/home/coolneng/.password-store
+    cd /mnt/home/coolneng/.dotfiles || exit
+    nix-shell -p stow --command "stow ."
+}
+
+restore_files() {
+    mkdir /tmp/iwd
+    scp zion:/vault/backups/panacea/iwd/iwd-networks.zip /tmp/iwd
+    cd /tmp/iwd || exit
+    unzip iwd-networks.zip
+    mv ./* /mnt/var/lib/iwd
+}
+
+usage() {
+    echo "Usage: install.sh <disk>"
+    echo "disk: full path to the disk (e.g. /dev/sda)"
+    exit 1
+}
+
+if [ $# != 1 ]; then
+    usage
+fi
+
+DISK="$1"
+
+echo "Let's start by partitioning the disk"
+partition_disk
+echo "Now we're creating the directories for the installation"
+create_directories
+echo "Starting up the ZFS machinery"
+zfs_setup
+echo "Mounting the horse"
+mount_datasets
+echo "Lift off to the NixOS planet"
+install_system
+echo "Adding pictures of Stallman"
+deploy_dotfiles
+echo "I'd just like to interject for a moment..."
+restore_files
+echo "All ready, time to rejoice"