in lib/between_meals/knife.rb [70:79]
def role_upload(roles)
if roles.any?
roles = roles.map do |x|
File.join(@role_dir, "#{x.name}.#{@role_type}")
end.join(' ')
exec!("#{@knife} role from file #{roles} #{@knife_verb_option} " +
"-c #{@config}", @logger)
end
end