nixpkgs/nixos/modules/programs/light.nix
Silvan Mosberger 4f0dadbf38 treewide: format all inactive Nix files
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build a08b3a4d19.tar.gz \
      --argstr baseRev b32a094368
    result/bin/apply-formatting $NIXPKGS_PATH
2024-12-10 20:26:33 +01:00

83 lines
2.2 KiB
Nix

{
config,
lib,
pkgs,
...
}:
let
cfg = config.programs.light;
in
{
options = {
programs.light = {
enable = lib.mkOption {
default = false;
type = lib.types.bool;
description = ''
Whether to install Light backlight control command
and udev rules granting access to members of the "video" group.
'';
};
brightnessKeys = {
enable = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
Whether to enable brightness control with keyboard keys.
This is mainly useful for minimalistic (desktop) environments. You
may want to leave this disabled if you run a feature-rich desktop
environment such as KDE, GNOME or Xfce as those handle the
brightness keys themselves. However, enabling brightness control
with this setting makes the control independent of X, so the keys
work in non-graphical ttys, so you might want to consider using this
instead of the default offered by the desktop environment.
Enabling this will turn on {option}`services.actkbd`.
'';
};
step = lib.mkOption {
type = lib.types.int;
default = 10;
description = ''
The percentage value by which to increase/decrease brightness.
'';
};
};
};
};
config = lib.mkIf cfg.enable {
environment.systemPackages = [ pkgs.light ];
services.udev.packages = [ pkgs.light ];
services.actkbd = lib.mkIf cfg.brightnessKeys.enable {
enable = true;
bindings =
let
light = "${pkgs.light}/bin/light";
step = builtins.toString cfg.brightnessKeys.step;
in
[
{
keys = [ 224 ];
events = [ "key" ];
# Use minimum brightness 0.1 so the display won't go totally black.
command = "${light} -N 0.1 && ${light} -U ${step}";
}
{
keys = [ 225 ];
events = [ "key" ];
command = "${light} -A ${step}";
}
];
};
};
}