Buck keeps all of its deliverables and state in files, so deleting those files is guaranteed to reset Buck's state so that a "clean build" can be performed. The set of files where Buck stores its output may change over time, but
buck clean will always remove the appropriate files for the current version.
(-p)Delete the directories generated by
buck project. This will not remove any
.imlfiles, nor any files under
(-v)How verbose logging to the console should be, with 1 as the minimum and 10 as the most verbose.