lulesh: follow garlic git branches

garlic/apps/lulesh/default.nix

@@ -1,31 +1,40 @@
 {
   stdenv
-, mpi
+, impi
 , mcxx
 , icc
+, gitBranch ? "garlic/tampi+isend+oss+taskfor"
+, tampi ? null
 }:
 
+with stdenv.lib;
+
 stdenv.mkDerivation rec {
   name = "lulesh";
 
   src = builtins.fetchGit {
-    url = "ssh://git@bscpm03.bsc.es/mmaronas/lulesh.git";
-    ref = "master";
+    url = "ssh://git@bscpm03.bsc.es/garlic/apps/lulesh.git";
+    ref = gitBranch;
   };
 
   dontConfigure = true;
 
+  preBuild = optionalString (tampi != null) "export TAMPI_HOME=${tampi}";
+
+  #TODO: Allow multiple MPI implementations and compilers
   buildInputs = [
-    mpi
+    impi
     icc
     mcxx
   ];
 
   enableParallelBuilding = true;
 
+  #TODO: Can we build an executable named "lulesh" in all branches?
   installPhase = ''
     mkdir -p $out/bin
-    find . -name 'lulesh*' -type f -executable -exec cp \{\} $out/bin/ \;
+    find . -name 'lulesh*' -type f -executable -exec cp \{\} $out/bin/${name} \;
   '';
+  programPath = "/bin/${name}";
 
 }