nixpkgs/nixos/modules/services/x11/fractalart.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.fractalart;
in {
options.services.fractalart = {
enable = mkOption {
type = types.bool;
default = false;
example = true;
description = "Enable FractalArt for generating colorful wallpapers on login";
};
width = mkOption {
type = types.nullOr types.int;
default = null;
example = 1920;
description = "Screen width";
};
height = mkOption {
type = types.nullOr types.int;
default = null;
example = 1080;
description = "Screen height";
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.haskellPackages.FractalArt ];
services.xserver.displayManager.sessionCommands =
"${pkgs.haskellPackages.FractalArt}/bin/FractalArt --no-bg -f .background-image"
+ optionalString (cfg.width != null) " -w ${toString cfg.width}"
+ optionalString (cfg.height != null) " -h ${toString cfg.height}";
};
}