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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.random-background;
flags = lib.concatStringsSep " "
([ "--bg-${cfg.display}" "--no-fehbg" "--randomize" ]
++ lib.optional (!cfg.enableXinerama) "--no-xinerama");
in {
meta.maintainers = [ maintainers.rycee ];
options = {
services.random-background = {
enable = mkEnableOption "" // {
description = ''
Whether to enable random desktop background.
</para><para>
Note, if you are using NixOS and have set up a custom
desktop manager session for Home Manager, then the session
configuration must have the <option>bgSupport</option>
option set to <literal>true</literal> or the background
image set by this module may be overwritten.
'';
};
imageDirectory = mkOption {
type = types.str;
example = "%h/backgrounds";
description = ''
The directory of images from which a background should be
chosen. Should be formatted in a way understood by systemd,
e.g., '%h' is the home directory.
'';
};
display = mkOption {
type = types.enum [ "center" "fill" "max" "scale" "tile" ];
default = "fill";
description = "Display background images according to this option.";
};
interval = mkOption {
default = null;
type = types.nullOr types.str;
example = "1h";
description = ''
The duration between changing background image, set to null
to only set background when logging in. Should be formatted
as a duration understood by systemd.
'';
};
enableXinerama = mkOption {
default = true;
type = types.bool;
description = ''
Will place a separate image per screen when enabled,
otherwise a single image will be stretched across all
screens.
'';
};
};
};
config = mkIf cfg.enable (mkMerge ([
{
systemd.user.services.random-background = {
Unit = {
Description = "Set random desktop background using feh";
After = [ "graphical-session-pre.target" ];
PartOf = [ "graphical-session.target" ];
};
Service = {
Type = "oneshot";
ExecStart = "${pkgs.feh}/bin/feh ${flags} ${cfg.imageDirectory}";
IOSchedulingClass = "idle";
};
Install = { WantedBy = [ "graphical-session.target" ]; };
};
}
(mkIf (cfg.interval != null) {
systemd.user.timers.random-background = {
Unit = { Description = "Set random desktop background using feh"; };
Timer = { OnUnitActiveSec = cfg.interval; };
Install = { WantedBy = [ "timers.target" ]; };
};
})
]));
}
|
