Add check for CarlaUnreal Content presence. (#7294)

* Add check for CarlaUnreal Content presence. Remove check for Release build and instead guard against Debug build.

---------

Co-authored-by: Xavier Solé Nogués <xavisolesoft@gmail.com>

CMakeLists.txt

@@ -68,9 +68,9 @@ include (${CARLA_WORKSPACE_PATH}/CMake/CarlaOptions.cmake)
 include (${CARLA_WORKSPACE_PATH}/CMake/Warnings.cmake)
 include (${CARLA_WORKSPACE_PATH}/CMake/Errors.cmake)
 
-if (NOT CMAKE_BUILD_TYPE STREQUAL "Release")
+if (CMAKE_BUILD_TYPE STREQUAL "Debug")
   carla_warning (
-    "CARLA is not set to be built in Release mode. This may cause issues when building CarlaUnrealEditor."
+    "CARLA is set to be built in Debug mode. This may cause issues when building CarlaUnrealEditor."
   )
 endif ()
 

Unreal/CMakeLists.txt

@@ -55,6 +55,14 @@ set (
   ${CARLA_UNREAL_ENGINE_PATH}/Engine/Binaries/${UE_SYSTEM_NAME}/UnrealEditor${EXE_EXT}
 )
 
+set (CARLA_UE_CONTENT_CHECK_PATH ${CARLA_UE_PATH}/Content/Carla/Blueprints)
+if (IS_DIRECTORY ${CARLA_UE_CONTENT_CHECK_PATH})
+  carla_message ("CARLA Unreal Content - FOUND")
+else ()
+  carla_message ("CARLA Unreal Content - MISSING")
+  carla_warning ("Could not find CARLA Content, download it or running the editor will result in a crash.")
+endif ()
+
 
 
 set (
@@ -326,12 +334,40 @@ add_custom_target (
   ${CARLA_LAUNCH_TARGET_OPTIONS}
 )
 
+if (WIN32)
+  set (
+    PRELAUNCH_CONTENT_CHECK_COMMAND
+    if exist ${CARLA_UE_CONTENT_CHECK_PATH} (exit 0) else (exit 1)
+  )
+else ()
+  set (
+    PRELAUNCH_CONTENT_CHECK_COMMAND
+    test -d ${CARLA_UE_CONTENT_CHECK_PATH}
+  )
+endif ()
+
+add_custom_target (
+  prelaunch-content-check
+  COMMAND
+    ${PRELAUNCH_CONTENT_CHECK_COMMAND}
+  COMMENT
+    "Performing prelaunch check for CARLA Content presence."
+  USES_TERMINAL
+  VERBATIM
+)
+
 add_dependencies (
   launch
   CarlaUnrealEditor
+  prelaunch-content-check
 )
 
 add_custom_target (
   launch-only
   ${CARLA_LAUNCH_TARGET_OPTIONS}
 )
+
+add_dependencies (
+  launch-only
+  prelaunch-content-check
+)