ptomulik/puppet-macro

dir = File.expand_path(File.join(File.dirname(__FILE__),'..','..','..'))
$LOAD_PATH.unshift(dir) unless $LOAD_PATH.include?(dir)
require 'puppet/macros'
module Puppet::Parser::Functions
  newfunction(:invoke, :type => :statement, :doc => <<-EOT
  Invoke macro as a statement.

  This function ivokes a macro defined with `Puppet::Macros.newmacro`
  method. The function takes macro name as first argument and macro parameters
  as the rest of arguments. The number of arguments provided by user is
  validated against macro's arity.

  *Example*:

  Let say, you have defined the following macro in
  *puppet/macros/print.rb*:

      # puppet/macros/pring.rb
      Puppet::Macros.newmacro 'print' do |msg|
        print msg
      end

  You may then invoke the macro from puppet as follows:

      invoke('print',"hello world!\\n")
  EOT
  ) do |args|
    Puppet::Macros.call_macro_from_func(self,:invoke,args)
  end
end