67 lines
1.8 KiB
Nix
67 lines
1.8 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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cfg = config.mj.services.btrfssnapshot;
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svcName =
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subvol: label:
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"btrfs-snapshot-${lib.strings.sanitizeDerivationName subvol}-${lib.strings.sanitizeDerivationName label}";
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in
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{
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options.mj.services.btrfssnapshot = {
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enable = lib.mkEnableOption "Enable btrfs snapshots";
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subvolumes = lib.mkOption {
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default = { };
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type =
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with lib.types;
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listOf (submodule {
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options = {
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subvolume = lib.mkOption { type = str; };
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label = lib.mkOption { type = str; };
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keep = lib.mkOption { type = int; };
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refreshInterval = lib.mkOption { type = str; };
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};
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});
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};
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};
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config = lib.mkIf cfg.enable {
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systemd = {
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timers = lib.listToAttrs (
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map (
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params:
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lib.nameValuePair (svcName params.subvolume params.label) {
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description = "${params.label} btrfs snapshot for ${params.subvolume}";
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wantedBy = [ "timers.target" ];
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timerConfig.OnCalendar = params.refreshInterval;
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}
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) cfg.subvolumes
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);
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services = lib.listToAttrs (
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map (
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params:
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lib.nameValuePair (svcName params.subvolume params.label) {
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description = "${params.label} btrfs snapshot for ${params.subvolume} (keep ${builtins.toString params.keep})";
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serviceConfig = {
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Type = "oneshot";
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ExecStart = ''
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${pkgs.btrfs-auto-snapshot}/bin/btrfs-auto-snapshot \
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--verbose \
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--label=${params.label} \
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--keep=${builtins.toString params.keep} \
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${params.subvolume}'';
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};
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}
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) cfg.subvolumes
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);
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};
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};
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}
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