hmc/puppet/modules/hdp2/lib/puppet/parser/functions/hdp_default.rb

#
#
# Licensed to the Apache Software Foundation (ASF) under one
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# to you under the Apache License, Version 2.0 (the
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# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
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# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
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module Puppet::Parser::Functions
  newfunction(:hdp_default, :type => :rvalue) do |args|
    args = function_hdp_args_as_array(args)
    scoped_var_name = args[0]
    var_name = scoped_var_name.split("/").last
    default = args[1]
    val = lookupvar("::#{var_name}")
    function_hdp_is_empty(val) ? (default||"") : val
  end
end