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path: root/system/services/snapper/default.nix
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{...}: {
  services.snapper = {
    configs = {
      srv = {
        SUBVOLUME = "/srv";
        FSTYPE = "btrfs";
        # users and groups allowed to work with config
        ALLOW_GROUPS = ["wheel"];

        # sync users and groups from ALLOW_USERS and ALLOW_GROUPS to .snapshots
        # directory
        SYNC_ACL = true;

        # run daily number cleanup
        NUMBER_CLEANUP = false;

        # limit for number cleanup
        NUMBER_MIN_AGE = 1800;
        NUMBER_LIMIT = 50;
        NUMBER_LIMIT_IMPORTANT = 10;

        # create hourly snapshots
        TIMELINE_CREATE = true;

        # cleanup hourly snapshots after some time
        TIMELINE_CLEANUP = true;

        # limits for timeline cleanup
        TIMELINE_MIN_AGE = 1800;
        TIMELINE_LIMIT_HOURLY = 7;
        TIMELINE_LIMIT_DAILY = 3;
        TIMELINE_LIMIT_WEEKLY = 2;
        TIMELINE_LIMIT_MONTHLY = 0;
        TIMELINE_LIMIT_YEARLY = 2;

        # cleanup empty pre-post-pairs
        EMPTY_PRE_POST_CLEANUP = true;
      };
    };
  };
}