Module: Hiera::Backend

Defined in:
lib/core/mod/hiera_backend.rb

Class Method Summary collapse

Class Method Details

.lookup(key, default, scope, order_override, resolution_type) ⇒ Object

NOTE: This method is overridden so we can collect accumulated hiera parameters and their values on a particular provisioning run for reporting purposes.



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# File 'lib/core/mod/hiera_backend.rb', line 10

def lookup(key, default, scope, order_override, resolution_type)
  @backends ||= {}
  answer = nil

  Config[:backends].each do |backend|
    if constants.include?("#{backend.capitalize}_backend") || constants.include?("#{backend.capitalize}_backend".to_sym)
      @backends[backend] ||= Backend.const_get("#{backend.capitalize}_backend").new
      new_answer = @backends[backend].lookup(key, scope, order_override, resolution_type)

      if not new_answer.nil?
        case resolution_type
        when :array
          raise Exception, "Hiera type mismatch: expected Array and got #{new_answer.class}" unless new_answer.kind_of? Array or new_answer.kind_of? String
          answer ||= []
          answer << new_answer
        when :hash
          raise Exception, "Hiera type mismatch: expected Hash and got #{new_answer.class}" unless new_answer.kind_of? Hash
          answer ||= {}
          answer = merge_answer(new_answer,answer)
        else
          answer = new_answer
          break
        end
      end
    end
  end

  answer = resolve_answer(answer, resolution_type) unless answer.nil?
  answer = parse_string(default, scope) if answer.nil? and default.is_a?(String)
  answer = default if answer.nil?
  
  # This is why we override this method!!
  # TODO: Submit a patch that allows for some kind of hook into the process.
  if CORL::Config.get_property(key).nil? || answer    
    CORL::Config.set_property(key, answer)
  end
  return answer
end