The ‘rake/clean’ file defines two file lists (CLEAN and
CLOBBER) and two rake tasks (:clean and :clobber).
- :clean
- Clean up the project by deleting scratch files and backup files. Add files
to the CLEAN file list to have the :clean target handle them.
- :clobber
- Clobber all generated and non-source files in a project. The task depends
on :clean, so all the clean files will be deleted as well as files in the
CLOBBER file list. The intent of this task is to return a project to its
pristine, just unpacked state.