Consistently modify CMAKE_MODULE_PATH

This should happen for both add_subdirectory() as well as find_package()
calls. Nothing should be included either way. The consuming project
decides, what should be included.

CMakeLists.txt

@@ -39,6 +39,10 @@ option(LoadStaticSharedTargets_INCLUDE_PACKAGING "Include packaging rules for Lo
 
 add_subdirectory(src)
 
+if (NOT IS_TOP_LEVEL)
+    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" PARENT_SCOPE)
+endif ()
+
 if (IS_TOP_LEVEL AND BUILD_TESTING)
     add_subdirectory(tests)
 endif ()

src/CMakeLists.txt

@@ -26,3 +26,5 @@ SOFTWARE.
 add_custom_target(LoadStaticSharedTargets ALL)
 
 add_subdirectory(cmake)
+
+set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" PARENT_SCOPE)

src/cmake/CMakeLists.txt

@@ -25,4 +25,5 @@ SOFTWARE.
 
 target_sources(LoadStaticSharedTargets PRIVATE LoadStaticSharedTargets.cmake)
 
-include(LoadStaticSharedTargets.cmake)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
+set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" PARENT_SCOPE)