netboot-config.nix

{ pkgs, ... }:

let
  justdoit = pkgs.writeScriptBin "justdoit" ''
    #!${stdenv.shell}
    set -ex
    sfdisk /dev/sda <<EOF
    label: dos
    device: /dev/sda
    unit: sectors
    /dev/sda1 : start=2048, type=83
    EOF
    mkfs.ext4 /dev/sda1
    mount -v /dev/sda1 /mnt
    nixos-generate-config --root /mnt

    for addr_path in /sys/class/net/*/address ; do
      read addr < $addr_path
      tentative_hostname=$(grep "$addr" "${./ethers}" | awk '{ print $2 }')
      [[ -n $tentative_hostname ]] && target_hostname=$tentative_hostname
    done
    [[ -z $target_hostname ]] && target_hostname=unknown
    echo "** Hostname is $target_hostname"
    sed "s/@HOSTNAME_HERE@/$target_hostname/" ${./target-config.nix} > /mnt/etc/nixos/configuration.nix

    nixos-install
    umount /mnt
    reboot
  '';
in
  {
    imports = [ <nixpkgs/nixos/modules/installer/netboot/netboot-minimal.nix> ];
    environment.systemPackages = [ justdoit ];
    services.openssh.enable = true;
    users.users.root.authorizedKeys.keys = [ (builtins.readFile ./keys/deploy.pub) ];
  }