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home-manager/modules/services/random-background.nix
Emily 36a53d9f26 treewide: convert all option docs to Markdown
This process was automated by [my fork of `nix-doc-munge`]. All
conversions were automatically checked to produce the same DocBook
result when converted back, modulo minor typographical/formatting
differences on the acceptable-to-desirable spectrum.

To reproduce this commit, run:

  $ NIX_PATH=nixpkgs=flake:nixpkgs/e7e69199f0372364a6106a1e735f68604f4c5a25 \
    nix shell nixpkgs#coreutils \
    -c find . -name '*.nix' \
    -exec nix run -- github:emilazy/nix-doc-munge/98dadf1f77351c2ba5dcb709a2a171d655f15099 \
    {} +
  $ ./format

[my fork of `nix-doc-munge`]: https://github.com/emilazy/nix-doc-munge/tree/home-manager
2023-07-17 18:40:56 +01:00

103 lines
2.9 KiB
Nix

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