swayrbar: Fix pulseaudio as optional dependency (default: disabled)

{ lib, fetchFromSourcehut, rustPlatform }:

{ lib, fetchFromSourcehut, rustPlatform, makeWrapper, withPulseaudio ? false, pulseaudio }:

rustPlatform.buildRustPackage rec {

  pname = "swayrbar";

  # don't build swayr

  buildAndTestSubdir = pname;

  nativeBuildInputs = [ makeWrapper ];

  preCheck = ''

    export HOME=$TMPDIR

  '';

  postInstall = lib.optionals withPulseaudio ''

    wrapProgram "$out/bin/swayrbar" \

      --prefix PATH : "$out/bin:${lib.makeBinPath [ pulseaudio ]}"

  '';

  meta = with lib; {

    description = "Status command for sway's swaybar implementing the swaybar-protocol";

    homepage = "https://git.sr.ht/~tsdh/swayr#a-idswayrbarswayrbara";