nix-config/modules/services/borgmatic.nix

{
  flake.modules.homeManager.borgmatic =
    { config
    , pkgs
    , ...
    }:
    let
      hostname = config.networking.hostname;
      username = config.home.username;
    in
    {
      home.packages = with pkgs; [
        libnotify
      ];

      programs.borgmatic = {
        backups.default = {
          location = {
            repositories = [
              {
                label = "duke";
                path = "ssh://borg@duke.veltnet:2222/home/borg/backups/${hostname}-${username}";
              }
            ];
            excludeHomeManagerSymlinks = true;
            patterns = [
              #TODO: home.homeDirectory might be usable here
              "R /home/${username}/Documents"
              "R /home/${username}/.ssh"
              "- /home/${username}/Documents/SteamLibrary"
              "- /home/${username}/Documents/PrismLauncher instances"
              "- /home/${username}/Documents/.Trash-1000"
              "- /home/${username}/Documents/VMs/Data"
              "- **/node_modules"
              "- **/.git"
              "- **/.cache"
              "- **/*build"
              "- **/target"
              "- **/.venv"
              "- **/venv"
              "- **/.gradle"
              "- **/out"
              "- **/dist"
              "- **/.pio"
            ];
          };
          retention.keepWeekly = 2;
          storage.extraConfig.ssh_command = "ssh -i /home/${username}/.ssh/id_ed25519_borg";
          #FIXME: consistency checks!!!
        };
      };

      systemd.user.services.borgmatic = {
        Unit.Description = "Create a backup using borgmatic";
        Service.ExecStart = "${pkgs.borgmatic}/bin/borgmatic create --stats";
      };

      systemd.user.timers.borgmatic = {
        Unit.Description = "Create weekly backups using borgmatic";
        Timer = {
          OnCalendar = "Weekly";
          Persistent = true;
        };
        Install.WantedBy = [ "timers.target" ];
      };
    };
}