nixos/modules/install.nix

   1 { pkgs, lib, config, ... }:
   2 let
   3   inherit (builtins) listToAttrs;
   4   inherit (lib) types;
   5   inherit (config) networking;
   6   cfg = config.install;
   7 in
   8 {
   9 options.install = {
  10   enable = lib.mkEnableOption "Install";
  11   shellHook = lib.mkOption {
  12     type = types.lines;
  13     default = "";
  14   };
  15   shellScript = lib.mkOption {
  16     type = types.lines;
  17     default = "";
  18     apply = pkgs.writeShellScriptBin "bash";
  19   };
  20   target = lib.mkOption {
  21     type = types.str;
  22     default = "root@${networking.hostName}.${networking.domain}";
  23   };
  24   generations = lib.mkOption {
  25     type = types.str;
  26     default = "+10";
  27   };
  28   profile = lib.mkOption {
  29     type = types.str;
  30     default = "/nix/var/nix/profiles/system";
  31   };
  32 };
  33 config = lib.mkIf cfg.enable {
  34   install.shellScript =
  35     let nixos = config.system.build.toplevel; in ''
  36     PATH="$PATH:${with pkgs; lib.makeBinPath [nix openssh]}"
  37     set -x
  38     nix ''${TRACE:+-L} copy \
  39      --to ssh://${cfg.target} --substitute-on-destination \
  40      ${nixos}
  41     ssh ${cfg.target} nix-env --profile "${cfg.profile}" --set "${nixos}" \
  42      '&&' nix-env --profile "${cfg.profile}" --delete-generations "${cfg.generations}" \
  43      '&&' "${cfg.profile}"/bin/switch-to-configuration "''${switch:-switch}"
  44   '';
  45 };
  46 }