XBMC AdvancedLauncher RetroArch launchers.

These are wrappers for retroarch wrappers, they are needed since launching a
process from XBMC(as a display manager and probably otherwise), using
AdvancedLauncher, results in it and it's parent recieving the same gamepad
input.

These wrappers will produce no sound on XBMC and AdvancedLauncher setups not
using a sound daemon, since XBMC gets paused while still holding onto the sound
device.

pkgs/misc/emulators/retroarch/cores.nix

@@ -24,7 +24,10 @@ let
         --add-flags "-L $COREDIR/${d2u core}_libretro.so $@"
     '';
 
-    passthru.libretroCore = "/lib/retroarch/cores";
+    passthru = {
+      core = core;
+      libretroCore = "/lib/retroarch/cores";
+    };
 
     meta = with stdenv.lib; {
       inherit description;

pkgs/misc/emulators/retroarch/xbmc-advanced-launchers.nix

@@ -0,0 +1,39 @@
+{ stdenv, pkgs, cores }:
+
+assert cores != [];
+
+with pkgs.lib;
+
+let
+
+  script = exec: ''
+    #!${stdenv.shell}
+    nohup sh -c "sleep 1 && pkill -SIGSTOP xbmc" &
+    nohup sh -c "${exec} '$@' -f;pkill -SIGCONT xbmc"
+  '';
+  scriptSh = exec: pkgs.writeScript ("xbmc-"+exec.name) (script exec.path);
+  execs = map (core: rec { name = core.core; path = core+"/bin/retroarch-"+name;}) cores;
+
+in
+
+stdenv.mkDerivation rec {
+  name = "xbmc-retroarch-advanced-launchers-${version}";
+  version = "0.2";
+
+  dontBuild = true;
+
+  buildCommand = ''
+    mkdir -p $out/bin
+    ${stdenv.lib.concatMapStrings (exec: "ln -s ${scriptSh exec} $out/bin/xbmc-${exec.name};") execs}
+  '';
+
+  meta = {
+    description = "XBMC retroarch advanced launchers";
+    longDescription = ''
+      These retroarch launchers are intended to be used with
+      anglescry advanced launcher for XBMC since device input is
+      caught by both XBMC and the retroarch process.
+    '';
+    license = "GPL-3";
+  };
+}

pkgs/top-level/all-packages.nix

@@ -10519,13 +10519,11 @@ let
       gtk_modules = [ libcanberra ];
     };
 
-  wrapRetroArch = { retroarch }:
+  retroArchCores =
   let
     cfg = stdenv.lib.attrByPath [ "retroarch" ] {} config;
   in
-    import ../misc/emulators/retroarch/wrapper.nix {
-      inherit stdenv lib makeWrapper retroarch;
-      cores = with libretro;
+    with libretro;
       ([ ]
       ++ lib.optional (cfg.enable4do or false) _4do
       ++ lib.optional (cfg.enableBsnesMercury or false) bsnes-mercury
@@ -10543,6 +10541,14 @@ let
       ++ lib.optional (cfg.enableStella or false) stella
       ++ lib.optional (cfg.enableVbaNext or false) vba-next
       );
+
+  wrapRetroArch = { retroarch }:
+  let
+    cfg = stdenv.lib.attrByPath [ "retroarch" ] {} config;
+  in
+    import ../misc/emulators/retroarch/wrapper.nix {
+      inherit stdenv lib makeWrapper retroarch;
+      cores = retroArchCores;
   };
 
   wxhexeditor = callPackage ../applications/editors/wxhexeditor { };
@@ -10574,6 +10580,11 @@ let
     ffmpeg = ffmpeg_1;
   };
 
+  xbmc-retroarch-advanced-launchers =
+    callPackage ../misc/emulators/retroarch/xbmc-advanced-launchers.nix {
+      cores = retroArchCores;
+    };
+
   xca = callPackage ../applications/misc/xca { };
 
   xcalib = callPackage ../tools/X11/xcalib { };