The file extension `.hpp` is not categorized as code in the areas of code indexes and it should be. See more details about this extension at https://en.wikipedia.org/wiki/Precompiled_header. This behavior is seen in the latest version available. See https://github.com/chaoss/grimoirelab-cereslib/blob/master/cereslib/enrich/enrich.py#L132