Catch missing MANIFEST file and warn rather than blowing up. Added 'nuke_release_tree()' method to blow away the directory from   which the archive file(s) are created, and call it (conditionally)   from 'make_distribution()'. Added 'keep_tree' option (false by default) to disable the call to   'nuke_release_tree()'.
Catch missing MANIFEST file and warn rather than blowing up.
Added 'nuke_release_tree()' method to blow away the directory from
  which the archive file(s) are created, and call it (conditionally)
  from 'make_distribution()'.
Added 'keep_tree' option (false by default) to disable the call to
  'nuke_release_tree()'.

pypa/setuptools,pypa/setuptools,pypa/setuptools