ae4e94d9ac
Suggested by Mathijs Kwik. ‘boot.systemd’ is a misnomer because systemd affects more than just booting. And it saves some typing.
62 lines
1.2 KiB
Nix
62 lines
1.2 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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let
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cfg = config.nix.gc;
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in
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{
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###### interface
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options = {
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nix.gc = {
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automatic = mkOption {
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default = false;
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type = types.bool;
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description = "
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Automatically run the garbage collector at specified dates.
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";
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};
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dates = mkOption {
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default = "15 03 * * *";
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type = types.string;
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description = "
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Run the garbage collector at specified dates to avoid full
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hard-drives.
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";
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};
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options = mkOption {
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default = "";
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example = "--max-freed $((64 * 1024**3))";
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type = types.string;
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description = "
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Options given to <filename>nix-collect-garbage</filename> when the
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garbage collector is run automatically.
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";
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};
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};
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};
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###### implementation
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config = {
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services.cron.systemCronJobs = mkIf cfg.automatic (singleton
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"${cfg.dates} root ${config.system.build.systemd}/bin/systemctl start nix-gc.service");
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systemd.services."nix-gc" =
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{ description = "Nix Garbage Collector";
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path = [ config.environment.nix ];
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script = "exec nix-collect-garbage ${cfg.options}";
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};
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};
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}
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