pyrox.dev
1{ config, lib, pkgs, utils, ... }:
2
3with lib;
4
5{
6
7 ###### interface
8
9 options = with types; {
10
11 services.freefall = {
12
13 enable = mkOption {
14 default = false;
15 description = ''
16 Whether to protect HP/Dell laptop hard drives (not SSDs) in free fall.
17 '';
18 type = bool;
19 };
20
21 devices = mkOption {
22 default = [ "/dev/sda" ];
23 description = ''
24 Device paths to all internal spinning hard drives.
25 '';
26 type = listOf string;
27 };
28
29 };
30
31 };
32
33 ###### implementation
34
35 config = let
36
37 cfg = config.services.freefall;
38
39 mkService = dev:
40 assert dev != "";
41 let dev' = utils.escapeSystemdPath dev; in
42 nameValuePair "freefall-${dev'}" {
43 description = "Free-fall protection for ${dev}";
44 after = [ "${dev'}.device" ];
45 wantedBy = [ "${dev'}.device" ];
46 path = [ pkgs.freefall ];
47 unitConfig = {
48 DefaultDependencies = false;
49 };
50 serviceConfig = {
51 ExecStart = "${pkgs.freefall}/bin/freefall ${dev}";
52 Restart = "on-failure";
53 Type = "forking";
54 };
55 };
56
57 in mkIf cfg.enable {
58
59 environment.systemPackages = [ pkgs.freefall ];
60
61 systemd.services = listToAttrs (map mkService cfg.devices);
62
63 };
64
65}