wine: add initial pulseaudio support

pkgs/misc/emulators/wine/base.nix

···
 { stdenv, lib, pkgArches,
   name, version, src, monos, geckos, platforms,
+  pulseaudioSupport,
   buildScript ? null, configureFlags ? ""
 }:
 
···
 
   nativeBuildInputs = toBuildInputs pkgArches (pkgs: (with pkgs; [
     freetype fontconfig mesa mesa_noglu.osmesa libdrm libpng libjpeg openssl gnutls cups ncurses
-  ]) ++ (with pkgs.xorg; [
+  ])
+  ++ lib.optional pulseaudioSupport pkgs.libpulseaudio
+  ++ (with pkgs.xorg; [
     xlibsWrapper libXi libXcursor libXinerama libXrandr libXrender libXxf86vm libXcomposite
   ]));
 

pkgs/misc/emulators/wine/default.nix

···
 { lib, pkgs, system, callPackage,
   wineRelease ? "stable",
   wineBuild ? (if system == "x86_64-linux" then "wineWow" else "wine32"),
+  pulseaudioSupport ? false,
   libtxc_dxtn_Name ? "libtxc_dxtn_s2tc" }:
 
 let wine-build = build: release:
       lib.getAttr build (callPackage ./packages.nix {
         wineRelease = release;
+        inherit pulseaudioSupport;
       });
 
 in if wineRelease == "staging" then

pkgs/misc/emulators/wine/packages.nix

···
 { system, stdenv, stdenv_32bit, lib, pkgs, pkgsi686Linux, fetchurl,
+  pulseaudioSupport,
   wineRelease ? "stable"
 }:
 
···
     name = "wine-${version}";
     inherit (sources) version src;
     inherit (pkgsi686Linux) lib stdenv;
+    inherit pulseaudioSupport;
     pkgArches = [ pkgsi686Linux ];
     geckos = with sources; [ wineGecko32 ];
     monos = with sources; [ wineMono ];
···
     name = "wine64-${version}";
     inherit (sources) version src;
     inherit lib stdenv;
+    inherit pulseaudioSupport;
     pkgArches = [ pkgs ];
     geckos = with sources; [ wineGecko64 ];
     monos = with sources; [ wineMono ];
···
     inherit (sources) version src;
     inherit lib;
     stdenv = stdenv_32bit;
+    inherit pulseaudioSupport;
     pkgArches = [ pkgs pkgsi686Linux ];
     geckos = with sources; [ wineGecko32 wineGecko64 ];
     monos = with sources; [ wineMono ];

pkgs/top-level/all-packages.nix

···
   wine = callPackage ../misc/emulators/wine {
     wineRelease = config.wine.release or "stable";
     wineBuild = config.wine.build or "wine32";
+    pulseaudioSupport = if (config ? pulseaudio)
+                        then config.pulseaudio
+                        else stdenv.isLinux;
   };
   wineStable = wine.override { wineRelease = "stable"; };
   wineUnstable = lowPrio (wine.override { wineRelease = "unstable"; });