The portstreelint utility checks the FreeBSD ports tree Index and some
parts of the ports' Makefiles for errors and warnings.

By default it will scan the whole port tree, but you can select a
subset of the ports by specifying lists of categories, maintainers and
ports names.

It is possible to generate a CSV delimited file with the
per-maintainer findings to a specified filename. This allows for
automated processing of the results, such as, for example, sending
warning emails, storing results and displaying only diffs since
previous run...