60 lines
1.5 KiB
Nix
60 lines
1.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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tzdir = "${pkgs.tzdata}/share/zoneinfo";
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nospace = str: filter (c: c == " ") (stringToCharacters str) == [];
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timezone = types.nullOr (types.addCheck types.str nospace)
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// { description = "null or string without spaces"; };
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in
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{
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options = {
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time = {
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timeZone = mkOption {
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default = null;
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type = timezone;
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example = "America/New_York";
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description = ''
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The time zone used when displaying times and dates. See <link
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xlink:href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones"/>
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for a comprehensive list of possible values for this setting.
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If null, the timezone will default to UTC and can be set imperatively
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using timedatectl.
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'';
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};
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hardwareClockInLocalTime = mkOption {
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default = false;
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type = types.bool;
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description = "If set, keep the hardware clock in local time instead of UTC.";
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};
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};
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};
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config = {
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environment.sessionVariables.TZDIR = "/etc/zoneinfo";
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# This way services are restarted when tzdata changes.
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systemd.globalEnvironment.TZDIR = tzdir;
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systemd.services.systemd-timedated.environment = lib.optionalAttrs (config.time.timeZone != null) { NIXOS_STATIC_TIMEZONE = "1"; };
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environment.etc = {
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zoneinfo.source = tzdir;
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} // lib.optionalAttrs (config.time.timeZone != null) {
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localtime.source = "/etc/zoneinfo/${config.time.timeZone}";
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localtime.mode = "direct-symlink";
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};
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};
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}
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