lcov: simplify path detection and use

CMakeLists.txt

@@ -120,27 +120,22 @@ if(meshFields_ENABLE_COVERAGE_BUILD)
 
   append_coverage_compiler_flags()
 
-  set(CABANA_INSTALL_DIR "" CACHE PATH "Set the path to the cabana install directory so it isn't processed by lcov")
-  set(KOKKOS_INSTALL_DIR "" CACHE PATH "Set the path to the kokkos install directory so it isn't processed by lcov")
-  set(KOKKOSKERNELS_INSTALL_DIR "" CACHE PATH "Set the path to the kokkos kernels install directory so it isn't processed by lcov")
-  set(OMEGAH_INSTALL_DIR "" CACHE PATH "Set the path to the omegah install directory so it isn't processed by lcov")
   set(LCOV_SYSTEM_EXCLUDE_PATHS "" CACHE PATH "Set path to system libraries, c++ compiler and cuda-11.4 by default, to be excluded from lcov analysis")
-
 
-  if (NOT DEFINED CACHE{CABANA_INSTALL_DIR})
-    message(ERROR " CABANA_INSTALL_DIR was not set or the path does not exist")
+  if (NOT EXISTS ${Cabana_DIR})
+    message(FATAL_ERROR " Cabana_DIR was not set or the path does not exist")
   endif()
 
-  if (NOT DEFINED CACHE{KOKKOS_INSTALL_DIR})
-    message(ERROR " KOKKOS_INSTALL_DIR was not set or the path does not exist")
+  if (NOT EXISTS ${Kokkos_DIR})
+    message(FATAL_ERROR " Kokkos_DIR was not set or the path does not exist")
   endif()
 
-  if (NOT DEFINED CACHE{KOKKOSKERNELS_INSTALL_DIR})
-    message(ERROR " KOKKOSKERNELS_INSTALL_DIR was not set or the path does not exist")
+  if (NOT EXISTS ${KokkosKernels_DIR})
+    message(FATAL_ERROR " KokkosKernels_DIR was not set or the path does not exist")
   endif()
 
-  if (NOT DEFINED CACHE{OMEGAH_INSTALL_DIR})
-    message(ERROR " OMEGAH_INSTALL_DIR was not set or the path does not exist")
+  if (NOT EXISTS ${Omega_h_DIR})
+    message(FATAL_ERROR " Omega_h_DIR was not set or the path does not exist")
   endif()
 
   setup_target_for_coverage_lcov(
@@ -151,10 +146,10 @@ if(meshFields_ENABLE_COVERAGE_BUILD)
       "${CMAKE_CURRENT_LIST_DIR}/.github/*"
       "${CMAKE_CURRENT_BINARY_DIR}/nvcc_internal_extended_lambda_implementation"
       "/tmp/*"
-      "${CABANA_INSTALL_DIR}"
-      "${KOKKOS_INSTALL_DIR}"
-      "${KOKKOSKERNELS_INSTALL_DIR}"
-      "${OMEGAH_INSTALL_DIR}"
+      "${Cabana_DIR}"
+      "${Kokkos_DIR}"
+      "${KokkosKernels_DIR}"
+      "${Omega_h_DIR}"
       "${LCOV_SYSTEM_EXCLUDE_PATHS}"  
   )