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8a277a6abf
Currently if a timezone was selected explicitly, the service will silently override the value, essentially ignoring what is meant to be a a deliberate choice of option. This may cause confusion as to why the option is not doing anything when this service is enabled, particularly in more complex set-ups after some time. This will simply make the choice deliberate from the user's part, either by having to remove the option or lowering its priority as a recognition that it may be ignored. This change was inspired by the `services.tzupdate` module, which does the same. [1]: <https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/misc/tzupdate.nix#L24>
95 lines
2.8 KiB
Nix
95 lines
2.8 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.automatic-timezoned;
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in
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{
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options = {
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services.automatic-timezoned = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable `automatic-timezoned`, simple daemon for keeping the system
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timezone up-to-date based on the current location. It uses geoclue2 to
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determine the current location and systemd-timedated to actually set
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the timezone.
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To avoid silent overriding by the service, if you have explicitly set a
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timezone, either remove it or ensure that it is set with a lower priority
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than the default value using `lib.mkDefault` or `lib.mkOverride`. This is
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to make the choice deliberate. An error will be presented otherwise.
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'';
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};
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package = mkPackageOption pkgs "automatic-timezoned" { };
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};
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};
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config = mkIf cfg.enable {
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# This will give users an error if they have set an explicit time
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# zone, rather than having the service silently override it.
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time.timeZone = null;
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security.polkit.extraConfig = ''
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polkit.addRule(function(action, subject) {
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if (action.id == "org.freedesktop.timedate1.set-timezone"
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&& subject.user == "automatic-timezoned") {
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return polkit.Result.YES;
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}
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});
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'';
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services.geoclue2 = {
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enable = true;
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appConfig.automatic-timezoned = {
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isAllowed = true;
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isSystem = true;
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users = [ (toString config.ids.uids.automatic-timezoned) ];
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};
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};
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systemd.services = {
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automatic-timezoned = {
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description = "Automatically update system timezone based on location";
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requires = [ "automatic-timezoned-geoclue-agent.service" ];
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after = [ "automatic-timezoned-geoclue-agent.service" ];
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serviceConfig = {
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Type = "exec";
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User = "automatic-timezoned";
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ExecStart = "${cfg.package}/bin/automatic-timezoned";
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};
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wantedBy = [ "default.target" ];
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};
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automatic-timezoned-geoclue-agent = {
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description = "Geoclue agent for automatic-timezoned";
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requires = [ "geoclue.service" ];
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after = [ "geoclue.service" ];
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serviceConfig = {
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Type = "exec";
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User = "automatic-timezoned";
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ExecStart = "${pkgs.geoclue2-with-demo-agent}/libexec/geoclue-2.0/demos/agent";
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Restart = "on-failure";
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PrivateTmp = true;
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};
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wantedBy = [ "default.target" ];
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};
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};
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users = {
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users.automatic-timezoned = {
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description = "automatic-timezoned";
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uid = config.ids.uids.automatic-timezoned;
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group = "automatic-timezoned";
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};
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groups.automatic-timezoned = {
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gid = config.ids.gids.automatic-timezoned;
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};
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};
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};
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}
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