ENH: SainteHelens is now tracked with git lfs

Former-commit-id: 8c85e7a8

.gitattributes

 GitLfsInstalled filter=lfs diff=lfs merge=lfs -text
+*.dem filter=lfs diff=lfs merge=lfs -text

src/Cxx/IO/CMakeLists.txt

 project (${WIKI}IO)
 
 if(NOT WikiExamples_BINARY_DIR)
-find_package(VTK REQUIRED)
-if(NOT VTK_USE_RENDERING)
-  message(FATAL_ERROR "Example ${PROJECT_NAME} requires VTK_USE_RENDERING.")
-endif()
-include(${VTK_USE_FILE})
+  find_package(VTK REQUIRED)
+  include(${VTK_USE_FILE})
 endif()
 
-if("${VTK_MAJOR_VERSION}.${VTK_MINOR_VERSION}" LESS 5.8)
-  set(KIT_LIBS vtkHybrid vtkGenericFiltering)
-else()
-  set(KIT_LIBS ${VTK_LIBRARIES})
-endif()
+set(KIT_LIBS ${VTK_LIBRARIES})
+
 #
 # Build all .cxx files in the directory
 file(GLOB ALL_FILES *.cxx)
+
+include(${WikiExamples_SOURCE_DIR}/CMake/RequiresGitLfs.cmake)
+
+Requires_GitLfs(DEMReader ALL_FILES)
+
 foreach(SOURCE_FILE ${ALL_FILES})
   string(REPLACE ".cxx" "" TMP ${SOURCE_FILE})
   string(REPLACE ${CMAKE_CURRENT_SOURCE_DIR}/ "" EXAMPLE ${TMP})
@@ -126,9 +125,6 @@ add_test(${KIT}-ReadAllPolyDataTypesDemo ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT
 add_test(${KIT}-ReadBMP ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
   TestReadBMP ${DATA}/masonry.bmp)
 
-add_test(${KIT}-DEMReader ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
-  TestDEMReader ${DATA}/SainteHelens.dem)
-
 add_test(${KIT}-ReadDICOM ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
   TestReadDICOM ${DATA}/prostate.img)
 
@@ -216,6 +212,10 @@ add_test(${KIT}-WriteVTI ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
 add_test(${KIT}-WriteVTU ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
   TestWriteVTU ${TEMP}/WriteVTU.vtu)
 
-include(${WikiExamples_SOURCE_DIR}/CMake/ExamplesTesting.cmake)
+# These tests use git large file system data
+if(GIT_LFS)
+  add_test(${KIT}-DEMReader ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${KIT}CxxTests
+    TestDEMReader ${DATA}/SainteHelens.dem)
+endif()
 
 endif()