Add vtkm variant to visit spack package. (#31887)

var/spack/repos/builtin/packages/visit/cmake-findvtkh-3.3.patch

@@ -0,0 +1,31 @@
+--- a/src/CMake/FindVTKh.cmake	2022-07-21 15:39:17.991222000 -0700
++++ b/src/CMake/FindVTKh.cmake	2022-07-21 15:42:12.326207000 -0700
+@@ -15,6 +15,10 @@
+ #   Kathleen Biagas, Tue Jan 21 10:46:31 PST 2020
+ #   Set VTKm_INCLUDE_DIRS.
+ #
++#   Eric Brugger, Thu 21 Jul 2022 06:39:36 PM EDT
++#   Modified the logic to handle the case where a RELWITHDEBINFO build of
++#   VTKh was created. Modified the logic not to install static libraries.
++#
+ #****************************************************************************/
+ 
+ IF (DEFINED VISIT_VTKH_DIR)
+@@ -47,13 +51,16 @@
+    # all interface link dependencies
+    function(get_lib_loc_and_install _lib)
+        get_target_property(ttype ${_lib} TYPE)
+-       if (ttype STREQUAL "INTERFACE_LIBRARY")
++       if (ttype STREQUAL "INTERFACE_LIBRARY" OR ttype STREQUAL "STATIC_LIBRARY")
+            return()
+        endif()
+        get_target_property(i_loc ${_lib} IMPORTED_LOCATION)
+        if (NOT i_loc)
+          get_target_property(i_loc ${_lib} IMPORTED_LOCATION_RELEASE)
+        endif()
++       if (NOT i_loc)
++         get_target_property(i_loc ${_lib} IMPORTED_LOCATION_RELWITHDEBINFO)
++       endif()
+        if(i_loc)
+            THIRD_PARTY_INSTALL_LIBRARY(${i_loc})
+        endif()

var/spack/repos/builtin/packages/visit/package.py

@@ -78,12 +78,14 @@ class Visit(CMakePackage):
     variant("silo", default=True, description="Enable Silo file format")
     variant("python", default=True, description="Enable Python support")
     variant("mpi", default=True, description="Enable parallel engine")
+    variant("vtkm", default=False, description="Enable VTK-m support")
 
     patch("spack-changes-3.1.patch", when="@3.1.0:3.2.2")
     patch("spack-changes-3.0.1.patch", when="@3.0.1")
     patch("nonframework-qwt.patch", when="^qt~framework platform=darwin")
     patch("parallel-hdf5.patch", when="@3.0.1:3.2.2+hdf5+mpi")
     patch("parallel-hdf5-3.3.patch", when="@3.3.0:+hdf5+mpi")
+    patch("cmake-findvtkh-3.3.patch", when="@3.3.0:+vtkm")
 
     # Fix pthread and librt link errors
     patch("visit32-missing-link-libs.patch", when="@3.2")
@@ -145,6 +147,14 @@ class Visit(CMakePackage):
     depends_on("adios2+python", when="+adios2+python")
     depends_on("adios2~python", when="+adios2~python")
 
+    # vtk-m also requires vtk-h. Disabling cuda since that requires
+    # later versions of vtk-m and vtk-h. The patch prevents vtk-m from
+    # throwing an exception whenever any vtk-m operations are performed.
+    depends_on("vtk-m@1.7.0+testlib~cuda", when="+vtkm")
+    depends_on("vtk-h@0.8.1+shared~mpi~openmp~cuda", when="+vtkm")
+
+    depends_on("vtk-m", patches=[patch("vtk-m_transport_tag_topology_field_in.patch")])
+
     depends_on("zlib")
 
     @when("@3:,develop")
@@ -268,6 +278,10 @@ def cmake_args(self):
         else:
             args.append(self.define("VISIT_PARALLEL", False))
 
+        if "+vtkm" in spec:
+            args.append(self.define("VISIT_VTKM_DIR", spec["vtk-m"].prefix))
+            args.append(self.define("VISIT_VTKH_DIR", spec["vtk-h"].prefix))
+
         return args
 
     # https://spack.readthedocs.io/en/latest/packaging_guide.html?highlight=executables#making-a-package-discoverable-with-spack-external-find

var/spack/repos/builtin/packages/visit/vtk-m_transport_tag_topology_field_in.patch

@@ -0,0 +1,12 @@
+--- a/vtkm/cont/arg/TransportTagTopologyFieldIn.h	2022-07-18 19:02:03.153633000 -0400
++++ b/vtkm/cont/arg/TransportTagTopologyFieldIn.h	2022-07-18 19:02:51.538743000 -0400
+@@ -90,7 +90,9 @@
+   {
+     if (object.GetNumberOfValues() != detail::TopologyDomainSize(inputDomain, TopologyElementTag()))
+     {
++#if 0
+       throw vtkm::cont::ErrorBadValue("Input array to worklet invocation the wrong size.");
++#endif
+     }
+ 
+     return object.PrepareForInput(Device(), token);