branch-1.2/ambari-agent/src/main/puppet/modules/hdp/lib/puppet/parser/functions/hdp_set_from_comma_list.rb

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#to handle differences in how args passed in
require 'set'
module Puppet::Parser::Functions
  newfunction(:hdp_set_from_comma_list, :type => :rvalue) do |args|
    list = function_hdp_array_from_comma_list(args)
    list.each_index {|i| list [i]=list [i].strip}
    #Delete empty strings
    list.reject! { |e| e.empty? }
    list.uniq   
  end
end