export.nix

{ config, lib, pkgs, ... }:
with lib;
let cfg = config.hcloud.export;
in {

  options.hcloud.export = {
    nix = mkOption {
      type = with types; nullOr str;
      default = null;
      description = ''
        Export hcloud information as nix file.
        Useful when if you want to import
        run a NixOS script after the terraform.
      '';
    };
  };

  config = mkIf (cfg.nix != null) {
    resource.local_file = {
      hcloud_export_nix = {
        content = let
          serverPart = name: ''
            ${name} = {
              host = {
                ipv4 = "''${ hcloud_server.${name}.ipv4_address }";
                ipv6 = "''${ hcloud_server.${name}.ipv6_address }";
              };
              location = "''${ hcloud_server.${name}.location }";
              backups = ''${ hcloud_server.${name}.backups};
            };
          '';
          allServerParts = map serverPart (attrNames config.hcloud.server);
        in ''
          # generated by terranix-hcloud : hcloud.export.nix
          # it lists every return value created
          # by the hcloud provider in nix format
          # so you can import it in another nix-lang tool
          {

          # hcloud servers:
          ${concatStringsSep "\n" allServerParts}
          }
        '';
        filename = cfg.nix;
      };
    };
  };

}