update installer

nixos/common/modules/installer.nix

@@ -1,83 +1,7 @@
 { config, desktop, lib, pkgs, username, ... }:
 let
   ifExists = groups: builtins.filter (group: builtins.hasAttr group config.users.groups) groups;
-  install-system = pkgs.writeScriptBin "install-system" ''
-#!${pkgs.stdenv.shell}
-
-#set -euo pipefail
-
-TARGET_HOST="''${1:-}"
-TARGET_USER="''${2:-albert}"
-
-if [ "$(id -u)" -eq 0 ]; then
-  echo "ERROR! $(basename "$0") should be run as a regular user"
-  exit 1
-fi
-
-if [ ! -d "/tmp/nixos/git/.git" ]; then
-  git clone https://git.sysctl.io/albert/nix "/tmp/nixos/git"
-fi
-
-pushd /tmp/nixos/git
-
-if [[ -z "$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
-
-# Check if the machine we're provisioning expects a keyfile to unlock a disk.
-# If it does, generate a new key, and write to a known location.
-if grep -q "secret.key" "nixos/$TARGET_HOST/disks.nix"; then
-  echo "Secret key not found.  Create one at /tmp/secret.key"
-  exit 1
-fi
-
-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.
-  if [[ -f "/tmp/secret.key" ]]; then
-    sudo cp /tmp/secret.key /mnt/etc/secret.key
-    sudo chmod 0400 /mnt/etc/secret.key
-  fi
-fi
-'';
+  install-system = pkgs.writeScriptBin "install-system" ${builtins.readFile ../../../docs/install.sh}";
 in
 {
   config.environment.systemPackages = [ install-system ];