nixpkgs/nixos/modules/installer/cd-dvd/installation-cd-base.nix

# This module contains the basic configuration for building a NixOS
# installation CD.

{ config, lib, options, pkgs, ... }:

with lib;

{
  imports =
    [ ./iso-image.nix

      # Profiles of this basic installation CD.
      ../../profiles/all-hardware.nix
      ../../profiles/base.nix
      ../../profiles/installation-device.nix
    ];

  # Adds terminus_font for people with HiDPI displays
  console.packages = options.console.packages.default ++ [ pkgs.terminus_font ];

  # ISO naming.
  isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.iso";

  # EFI booting
  isoImage.makeEfiBootable = true;

  # USB booting
  isoImage.makeUsbBootable = true;

  # Add Memtest86+ to the CD.
  boot.loader.grub.memtest86.enable = true;

  # An installation media cannot tolerate a host config defined file
  # system layout on a fresh machine, before it has been formatted.
  swapDevices = mkImageMediaOverride [ ];
  fileSystems = mkImageMediaOverride config.lib.isoFileSystems;

  boot.postBootCommands = ''
    for o in $(</proc/cmdline); do
      case "$o" in
        live.nixos.passwd=*)
          set -- $(IFS==; echo $o)
          echo "nixos:$2" | ${pkgs.shadow}/bin/chpasswd
          ;;
      esac
    done
  '';

  system.stateVersion = mkDefault "18.03";
}