Merge #2817

2817: doc: better removal of existing docs r=AlanGriffiths a=Saviq

`rm -f dir` doesn't do.

Fixes: #2800

Co-authored-by: Michał Sawicz (Saviq) <michal@sawicz.net>

cmake/Doxygen.cmake

@@ -27,7 +27,7 @@ if(DOXYGEN_FOUND)
     set(ALL "ALL")
   endif()
   add_custom_target(doc ${ALL}
-                    COMMAND rm -f  ${CMAKE_BINARY_DIR}/doc/html/{*,search}
+                    COMMAND find ${CMAKE_BINARY_DIR}/doc/html/ -mindepth 1 -maxdepth 1 -not -name cppguide -exec rm -rf {} +
                     COMMAND rm -rf ${CMAKE_BINARY_DIR}/doc/xml
                     COMMAND ${DOXYGEN_EXECUTABLE} ${PROJECT_BINARY_DIR}/Doxyfile
                     SOURCES ${PROJECT_BINARY_DIR}/Doxyfile