114 lines
2.8 KiB
Nix
114 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.redshift;
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lcfg = config.location;
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in {
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options.services.redshift = {
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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 Redshift to change your screen's colour temperature depending on
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the time of day.
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'';
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};
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temperature = {
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day = mkOption {
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type = types.int;
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default = 5500;
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description = ''
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Colour temperature to use during the day, between
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<literal>1000</literal> and <literal>25000</literal> K.
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'';
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};
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night = mkOption {
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type = types.int;
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default = 3700;
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description = ''
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Colour temperature to use at night, between
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<literal>1000</literal> and <literal>25000</literal> K.
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'';
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};
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};
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brightness = {
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day = mkOption {
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type = types.str;
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default = "1";
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description = ''
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Screen brightness to apply during the day,
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between <literal>0.1</literal> and <literal>1.0</literal>.
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'';
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};
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night = mkOption {
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type = types.str;
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default = "1";
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description = ''
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Screen brightness to apply during the night,
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between <literal>0.1</literal> and <literal>1.0</literal>.
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'';
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};
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};
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package = mkOption {
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type = types.package;
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default = pkgs.redshift;
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defaultText = "pkgs.redshift";
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description = ''
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redshift derivation to use.
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'';
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};
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extraOptions = mkOption {
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type = types.listOf types.str;
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default = [];
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example = [ "-v" "-m randr" ];
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description = ''
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Additional command-line arguments to pass to
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<command>redshift</command>.
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'';
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};
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};
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config = mkIf cfg.enable {
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# needed so that .desktop files are installed, which geoclue cares about
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environment.systemPackages = [ cfg.package ];
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services.geoclue2.appConfig."redshift" = {
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isAllowed = true;
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isSystem = true;
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};
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systemd.user.services.redshift =
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let
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providerString = if lcfg.provider == "manual"
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then "${toString lcfg.latitude}:${toString lcfg.longitude}"
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else lcfg.provider;
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in
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{
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description = "Redshift colour temperature adjuster";
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wantedBy = [ "graphical-session.target" ];
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partOf = [ "graphical-session.target" ];
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serviceConfig = {
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ExecStart = ''
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${cfg.package}/bin/redshift \
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-l ${providerString} \
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-t ${toString cfg.temperature.day}:${toString cfg.temperature.night} \
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-b ${toString cfg.brightness.day}:${toString cfg.brightness.night} \
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${lib.strings.concatStringsSep " " cfg.extraOptions}
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'';
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RestartSec = 3;
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Restart = "always";
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};
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};
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};
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}
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