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