flakes/modules/system/snapper.nix

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{ config, lib, ... }: {
services.snapper = {
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cleanupInterval = "1h";
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configs.home = {
fstype = "btrfs";
subvolume = "/home";
extraConfig = lib.concatStringsSep "\n" (lib.mapAttrsToList (k: v: "${k}=${v}") {
TIMELINE_CLEANUP = "yes";
TIMELINE_CREATE = "yes";
TIMELINE_MIN_AGE = "1800";
TIMELINE_LIMIT_HOURLY = "5";
TIMELINE_LIMIT_DAILY = "7";
TIMELINE_LIMIT_WEEKLY = "0";
TIMELINE_LIMIT_MONTHLY = "0";
TIMELINE_LIMIT_YEARLY = "0";
});
};
};
}