Update ovni to release and add useGit option

bsc/ovni/default.nix

@@ -3,28 +3,42 @@
 , lib
 , cmake
 , mpi
+, fetchFromGitHub
+, useGit ? false
 , gitBranch ? "master"
 , gitURL ? "ssh://git@bscpm03.bsc.es/rarias/ovni.git"
-, gitCommit ? null
-# By default use debug
-, enableDebug ? true
+, gitCommit ? "d0a47783f20f8b177a48418966dae45454193a6a"
+, enableDebug ? false
 }:
 
 with lib;
 
-stdenv.mkDerivation rec {
+let
+  release = rec {
+    version = "1.2.0";
+    src = fetchFromGitHub {
+      owner = "bsc-pm";
+      repo = "ovni";
+      rev = "${version}";
+      sha256 = "sha256-J6eC62RT/0CHN7IXJuIw1c9GBkjvVEyh0HjIF7uG0FM=";
+    };
+  };
+
+  git = rec {
+    version = src.shortRev;
+    src = builtins.fetchGit {
+      url = gitUrl;
+      ref = gitBranch;
+      rev = gitCommit;
+    };
+  };
+
+  source = if (useGit) then git else release;
+in
+  stdenv.mkDerivation rec {
     pname = "ovni";
-  version = "${src.shortRev}";
-
+    inherit (source) src version;
     buildInputs = [ cmake mpi ];
-
     cmakeBuildType = if (enableDebug) then "Debug" else "Release";
     dontStrip = true;
-
-  src = builtins.fetchGit ({
-    url = gitURL;
-    ref = gitBranch;
-  } // optionalAttrs (gitCommit != null) ({
-    rev = gitCommit;
-  }));
-}
+  }

overlay.nix

@@ -260,10 +260,6 @@ let
 
     cn6 = callPackage ./bsc/cn6/default.nix { };
     ovni = callPackage ./bsc/ovni/default.nix { };
-    ovniKernel = callPackage ./bsc/ovni/default.nix {
-      gitBranch = "kernel-context-switch";
-      gitCommit = null;
-    };
 
     # =================================================================
     #  MN4 specific