Merge branch 'update-approach-for-downloading-assimp-source' into 'master'

COMP: Improve source download strategy for Assimp project

See merge request iMSTK/iMSTK!770

CMake/External/External_Assimp.cmake

@@ -5,22 +5,15 @@ include(imstkAddExternalProject)
 
 # Download options
 if(NOT DEFINED iMSTK_Assimp_GIT_SHA)
-  set(iMSTK_Assimp_GIT_SHA "fixCompilationError")
+  set(iMSTK_Assimp_GIT_SHA "ce3d6a91d2e0e945493c0fdeb162b50c9034e5f9") # imstk-v3.3.1-2016-07-08-a8673d482
 endif()
 if(NOT DEFINED iMSTK_Assimp_GIT_REPOSITORY)
-  set(EXTERNAL_PROJECT_DOWNLOAD_OPTIONS
-    URL https://gitlab.kitware.com/iMSTK/assimp/-/archive/${iMSTK_Assimp_GIT_SHA}/assimp-${iMSTK_Assimp_GIT_SHA}.zip
-    URL_HASH MD5=fab081af9dbd73a9a5c61cd33dd93340
-    )
-else()
-  set(EXTERNAL_PROJECT_DOWNLOAD_OPTIONS
-    GIT_REPOSITORY ${iMSTK_Assimp_GIT_REPOSITORY}
-    GIT_TAG ${iMSTK_Assimp_GIT_SHA}
-    )
+  set(iMSTK_Assimp_GIT_REPOSITORY "https://gitlab.kitware.com/iMSTK/assimp.git")
 endif()
 
 imstk_add_external_project( Assimp
-  ${EXTERNAL_PROJECT_DOWNLOAD_OPTIONS}
+  GIT_REPOSITORY ${iMSTK_Assimp_GIT_REPOSITORY}
+  GIT_TAG ${iMSTK_Assimp_GIT_SHA}
   CMAKE_CACHE_ARGS
     -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON
     -DASSIMP_BUILD_ASSIMP_TOOLS:BOOL=OFF