This is the Thorfile I use in order to perform cookbook version bumps and then upload them to my Chef Server. Since I am using Berkshelf v2.0.7 and a Mac, I have to ensure that there are no .DS_Store files.

Thorfile.rb

# encoding: utf-8

require 'bundler'
require 'bundler/setup'
require 'thor/foodcritic'
require 'thor/scmversion'
require 'berkshelf/thor'

class Berksolo < Thor
  include Thor::Actions
  
  # Note on using berkshelf v2.0.7, a bug prevents uploading to Chef 
  # Server. Need to delete all .DS_Store files since Ridley doesn't
  # respect the chefignore properly for .DS_Store files
  # ref: http://lists.opscode.com/sympa/arc/chef/2013-07/msg00154.html
  # ref: https://github.com/RiotGames/berkshelf/issues/587  
  desc "upload", "prepares cookbook and uploads it Chef Server"
  def upload
    run "find . -name '*.DS_Store' -type f -delete"
    thor "version:bump", "auto"
    thor "berkshelf:upload"
  end
end