gistfile1.txt

      def get_keys_per_dir(dir, scope={}, is_data_mapping=false, interpolate_hiera_data=true)
        begin
          require 'hiera'
        rescue
          Puppet.Warning("Hiera libraries could not be loaded")
          return {}
        end
        # get the hiera config file
        hiera_config_file  = File.join(Puppet[:confdir], 'hiera.yaml')
        data = {}
        # iterate through all data sources from this config file
        Hiera::Backend.datasources(
          scope,
          nil,
          get_hierarchy(hiera_config_file)
        ) do |source|
          # search for data overrides in the global_hiera_params directory
          yamlfile = get_data_file(File.join(data_dir, dir), "#{source}.yaml")
          Puppet.debug("Searching #{yamlfile} for keys")
          if File.exists?(yamlfile)
            config = YAML.load_file(yamlfile)
            config.each do |k, v|
              data = yield(k,v,data)
            end
          end
        end
        data
      end