Tests/RunCMake/FetchContent/LogLevelPatch.cmake - external/github.com/Kitware/CMake - Git at Google

 if(EXISTS "${PATCH_COUNT_FILE}")
   file(READ "${PATCH_COUNT_FILE}" patch_count)
 else()
   set(patch_count 0)
 endif()
 math(EXPR patch_count "${patch_count} + 1")
 file(WRITE "${PATCH_COUNT_FILE}" "${patch_count}")
	if(EXISTS "${PATCH_COUNT_FILE}")
	file(READ "${PATCH_COUNT_FILE}" patch_count)
	else()
	set(patch_count 0)
	endif()
	math(EXPR patch_count "${patch_count} + 1")
	file(WRITE "${PATCH_COUNT_FILE}" "${patch_count}")