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home-manager/modules/services/wlsunset.nix
Robert Helgesson 5f433eb164
Move platform check into modules
Before, loading a module would be guarded by an optional platform
condition. This made it possible to avoid loading and evaluating a
module if it did not support the host platform.

Unfortunately, this made it impossible to share a single configuration
between GNU/Linux and Darwin hosts, which some wish to do.

This removes the conditional load and instead inserts host platform
assertions in the modules that are platform specific.

Fixes #1906
2021-07-18 20:43:22 +02:00

102 lines
2.4 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let cfg = config.services.wlsunset;
in {
meta.maintainers = [ maintainers.matrss ];
options.services.wlsunset = {
enable = mkEnableOption "Whether to enable wlsunset.";
package = mkOption {
type = types.package;
default = pkgs.wlsunset;
defaultText = "pkgs.wlsunset";
description = ''
wlsunset derivation to use.
'';
};
latitude = mkOption {
type = types.str;
description = ''
Your current latitude, between <literal>-90.0</literal> and
<literal>90.0</literal>.
'';
};
longitude = mkOption {
type = types.str;
description = ''
Your current longitude, between <literal>-180.0</literal> and
<literal>180.0</literal>.
'';
};
temperature = {
day = mkOption {
type = types.int;
default = 6500;
description = ''
Colour temperature to use during the day, in Kelvin (K).
This value must be greater than <literal>temperature.night</literal>.
'';
};
night = mkOption {
type = types.int;
default = 4000;
description = ''
Colour temperature to use during the night, in Kelvin (K).
This value must be smaller than <literal>temperature.day</literal>.
'';
};
};
gamma = mkOption {
type = types.str;
default = "1.0";
description = ''
Gamma value to use.
'';
};
systemdTarget = mkOption {
type = types.str;
default = "graphical-session.target";
description = ''
Systemd target to bind to.
'';
};
};
config = mkIf cfg.enable {
assertions = [
(lib.hm.assertions.assertPlatform "services.wlsunset" pkgs
lib.platforms.linux)
];
systemd.user.services.wlsunset = {
Unit = {
Description = "Day/night gamma adjustments for Wayland compositors.";
PartOf = [ "graphical-session.target" ];
};
Service = {
ExecStart = let
args = [
"-l ${cfg.latitude}"
"-L ${cfg.longitude}"
"-t ${toString cfg.temperature.night}"
"-T ${toString cfg.temperature.day}"
"-g ${cfg.gamma}"
];
in "${cfg.package}/bin/wlsunset ${concatStringsSep " " args}";
};
Install = { WantedBy = [ cfg.systemdTarget ]; };
};
};
}