modules/backup-server.nix


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

let
  cfg = config.orbekk.backups;

  backups.pincer = {
    paths = [ "/etc/nixos" ];
    doInit = true;
    repo = cfg.serverLocation;
    encryption = {
      mode = "repokey-blake2";
      passCommand = "cat ${config.age.secrets.pincer-borg-repo-key.path}";
    };
    environment = { BORG_RSH = "ssh -i ${config.age.secrets.pincer-borg-ssh-key.path}"; };
    compression = "auto,lzma";
    startAt = "daily";
  };

  backupJob = {
    ${config.networking.hostName} = backups.${config.networking.hostName};
  };
in
{
  options = {
    orbekk.backups = {
      enableServer = lib.mkEnableOption "Enable backup server";
      enableClient = lib.mkEnableOption "Enable backup client";
      serverLocation = lib.mkOption {
        type = lib.types.str;
        default = "borg@localhost:.";
      };
    };
  };

  config = {
    age.secrets.pincer-borg-repo-key.file = ../secrets/pincer-borg-repo-key.age;
    age.secrets.pincer-borg-ssh-key.file = ../secrets/pincer-borg-ssh-key.age;

    services.borgbackup.repos = lib.mkIf cfg.enableServer {
      pincer = {
        authorizedKeys = [ (builtins.readFile ../secrets/pincer-borg-ssh-key.pub) ];
        path = [ "/var/lib/borg-pincer" ];
      };
    };

    services.borgbackup.jobs = lib.mkIf cfg.enableClient backupJob;
  };
}