puppetlabs-stdlib/lib/puppet/parser/functions/parseyaml.rb

#
# parseyaml.rb
#

module Puppet::Parser::Functions
  newfunction(:parseyaml, :type => :rvalue, :arity => -2, :doc => <<-EOS
This function accepts YAML as a string and converts it into the correct
Puppet structure.

The optional second argument can be used to pass a default value that will
be returned if the parsing of YAML string have failed.
  EOS
  ) do |arguments|
    raise ArgumentError, 'Wrong number of arguments. 1 or 2 arguments should be provided.' unless arguments.length >= 1
    require 'yaml'

    begin
      YAML::load(arguments[0]) || arguments[1]
    rescue Exception
      arguments[1]
    end

  end
end

# vim: set ts=2 sw=2 et :