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{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.clight;
toConf = v:
if builtins.isFloat v then toString v
else if isInt v then toString v
else if isBool v then boolToString v
else if isString v then ''"${escape [''"''] v}"''
else if isList v then "[ " + concatMapStringsSep ", " toConf v + " ]"
else abort "clight.toConf: unexpected type (v = ${v})";
clightConf = pkgs.writeText "clight.conf"
(concatStringsSep "\n" (mapAttrsToList
(name: value: "${toString name} = ${toConf value};")
(filterAttrs
(_: value: value != null)
cfg.settings)));
in {
options.services.clight = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable clight or not.
'';
};
temperature = {
day = mkOption {
type = types.int;
default = 5500;
description = ''
Colour temperature to use during the day, between
<literal>1000</literal> and <literal>25000</literal> K.
'';
};
night = mkOption {
type = types.int;
default = 3700;
description = ''
Colour temperature to use at night, between
<literal>1000</literal> and <literal>25000</literal> K.
'';
};
};
settings = let
validConfigTypes = with types; either int (either str (either bool float));
in mkOption {
type = with types; attrsOf (nullOr (either validConfigTypes (listOf validConfigTypes)));
default = {};
example = { captures = 20; gamma_long_transition = true; ac_capture_timeouts = [ 120 300 60 ]; };
description = ''
Additional configuration to extend clight.conf. See
<link xlink:href="https://github.com/FedeDP/Clight/blob/master/Extra/clight.conf"/> for a
sample configuration file.
'';
};
};
config = mkIf cfg.enable {
boot.kernelModules = [ "i2c_dev" ];
environment.systemPackages = with pkgs; [ clight clightd ];
services.dbus.packages = with pkgs; [ clight clightd ];
services.upower.enable = true;
services.clight.settings = {
gamma_temp = with cfg.temperature; mkDefault [ day night ];
} // (optionalAttrs (config.location.provider == "manual") {
latitude = mkDefault config.location.latitude;
longitude = mkDefault config.location.longitude;
});
services.geoclue2.appConfig."clightc" = {
isAllowed = true;
isSystem = true;
};
systemd.services.clightd = {
requires = [ "polkit.service" ];
wantedBy = [ "multi-user.target" ];
description = "Bus service to manage various screen related properties (gamma, dpms, backlight)";
serviceConfig = {
Type = "dbus";
BusName = "org.clightd.clightd";
Restart = "on-failure";
RestartSec = 5;
ExecStart = ''
${pkgs.clightd}/bin/clightd
'';
};
};
systemd.user.services.clight = {
after = [ "upower.service" "clightd.service" ];
wants = [ "upower.service" "clightd.service" ];
partOf = [ "graphical-session.target" ];
wantedBy = [ "graphical-session.target" ];
description = "C daemon to adjust screen brightness to match ambient brightness, as computed capturing frames from webcam";
serviceConfig = {
Restart = "on-failure";
RestartSec = 5;
ExecStart = ''
${pkgs.clight}/bin/clight --conf-file ${clightConf}
'';
};
};
};
}
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