generate.nix

{ format ? "virtualbox"
, configuration ? ./configuration.nix
, ...
}:
let
  sources = import (nix/sources.nix) {};
  pkgs = import (sources.nixpkgs) {};
  nixos-generators = import (pkgs.fetchFromGitHub {
    owner = "evanjs";
    repo = "nixos-generators";
    rev = "3ccab611416e83ad171f593e4f36e85d05e39e56";
    sha256 = "1mmcq35gkbgs0q8xa355qd8am4qxqd854abjyxvd708chj3kahmc";
  }) {};
  #nixos-generators-path = "${nixos-generators}/share/nixos-generator";
  nixos-generators-path = "/home/evanjs/src/nixos-generators";
in
  with pkgs;
  let
    confg = ./configuration.nix;
    format-type = if (format == "esxi") then "virtualbox" else format;
    formattedImage = pkgs.callPackage "${nixos-generators-path}/nixos-generate.nix" {
      configuration = ./configuration.nix;
      format-config = "${nixos-generators-path}/formats/${format-type}.nix";
    };
      fixedImage = 
      let
        vmConfig = formattedImage.config.system.build;
        vboxImage = vmConfig.virtualBoxOVA;
        vboxName = vboxImage.name;
      in
      pkgs.runCommand "fix-esxi-image" {}
      ''
        mkdir $out
        tar -xvf ${vboxImage}/*.ova

        ovf=$(ls -1 *.ovf)
        mf=$(ls -1 *.mf)
        vmdk=$(ls -1 *.vmdk)

        sed 's;\(.*<vssd:VirtualSystemType>\).*\(</vssd:VirtualSystemType>\);\1vmx-14\2;;' -i nixos-20.09pre-git-x86_64-linux.ovf
        sum=$(sha1sum $ovf | cut -d ' ' -f-1)
        substituteInPlace $mf --replace "SHA1 ($ovf) = .*" "SHA1 ($ovf) = $sum"
        tar -cvf nixos.ova $ovf $mf $vmdk
        cp nixos.ova $out
    '';
  in
if format == "esxi" then fixedImage else formattedImage.config.system.build.${format-type}