infrastructure/nixos/hosts/thalassa/null/rescue-boot.nix

{ pkgs, ... }:
let
  # TODO: slim down size
  netboot = import (pkgs.path + "/nixos/lib/eval-config.nix") {
    inherit (pkgs) system;
    modules = [
      (pkgs.path + "/nixos/modules/installer/netboot/netboot-minimal.nix")
      module
    ];
  };
  module = {
    system.stateVersion = "22.11";
    boot.supportedFilesystems = [ "btrfs" "ext4" ];
    environment.systemPackages = with pkgs; [ git ];
  };
in
{
  boot.loader.systemd-boot = {
    extraEntries = {
      "rescue.conf" = ''
        title Rescue Boot
        linux /rescue-kernel
        initrd /rescue-initrd
        options init=${netboot.config.system.build.toplevel}/init ${
          toString netboot.config.boot.kernelParams
        }
      '';
    };

    extraFiles = {
      "rescue-kernel" = "${netboot.config.system.build.kernel}/bzImage";
      "rescue-initrd" = "${netboot.config.system.build.netbootRamdisk}/initrd";
    };
  };
}