pyrox.dev
1{ config, lib, pkgs, ... }:
2
3with lib;
4
5let
6 cfg = config.nix.optimise;
7in
8
9{
10
11 ###### interface
12
13 options = {
14
15 nix.optimise = {
16
17 automatic = mkOption {
18 default = false;
19 type = types.bool;
20 description = "Automatically run the nix store optimiser at a specific time.";
21 };
22
23 dates = mkOption {
24 default = ["03:45"];
25 type = types.listOf types.str;
26 description = ''
27 Specification (in the format described by
28 <citerefentry><refentrytitle>systemd.time</refentrytitle>
29 <manvolnum>7</manvolnum></citerefentry>) of the time at
30 which the optimiser will run.
31 '';
32 };
33 };
34 };
35
36
37 ###### implementation
38
39 config = {
40
41 systemd.services.nix-optimise =
42 { description = "Nix Store Optimiser";
43 serviceConfig.ExecStart = "${config.nix.package}/bin/nix-store --optimise";
44 startAt = optionals cfg.automatic cfg.dates;
45 };
46
47 };
48
49}