146 lines
3.8 KiB
Nix
146 lines
3.8 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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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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latitude = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Your current latitude, between
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<literal>-90.0</literal> and <literal>90.0</literal>. Must be provided
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along with longitude.
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'';
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};
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longitude = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Your current longitude, between
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between <literal>-180.0</literal> and <literal>180.0</literal>. Must be
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provided along with latitude.
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'';
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};
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provider = mkOption {
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type = types.enum [ "manual" "geoclue2" ];
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default = "manual";
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description = ''
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The location provider to use for determining your location. If set to
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<literal>manual</literal> you must also provide latitude/longitude.
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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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assertions = [
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{
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assertion =
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if cfg.provider == "manual"
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then (cfg.latitude != null && cfg.longitude != null)
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else (cfg.latitude == null && cfg.longitude == null);
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message = "Latitude and longitude must be provided together, and with provider set to null.";
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}
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];
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services.geoclue2.enable = mkIf (cfg.provider == "geoclue2") true;
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systemd.user.services.redshift =
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let
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providerString =
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if cfg.provider == "manual"
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then "${cfg.latitude}:${cfg.longitude}"
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else cfg.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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