Class: Puppet::Parser::ParserFactory

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/parser/parser_factory.rb

Overview

The ParserFactory makes selection of parser possible. Currently, it is possible to switch between two different parsers:

  • classic_parser, the parser in 3.1

  • eparser, the Expression Based Parser

Class Method Summary collapse

Class Method Details

.classic_parser(environment) ⇒ Object

Creates an instance of the classic parser.



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# File 'lib/puppet/parser/parser_factory.rb', line 26

def self.classic_parser(environment)
  require 'puppet/parser'

  Puppet::Parser::Parser.new(environment)
end

.eparser(environment) ⇒ Object

Creates an instance of the expression based parser ‘eparser’



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# File 'lib/puppet/parser/parser_factory.rb', line 45

def self.eparser(environment)
  # Since RGen is optional, test that it is installed
  @@asserted ||= false
  assert_rgen_installed() unless @@asserted
  @@asserted = true
  require 'puppet/parser'
  require 'puppet/parser/e_parser_adapter'
  EParserAdapter.new(Puppet::Parser::Parser.new(environment))
end

.evaluating_parser(file_watcher) ⇒ Object

Returns an instance of an EvaluatingParser



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# File 'lib/puppet/parser/parser_factory.rb', line 33

def self.evaluating_parser(file_watcher)
  # Since RGen is optional, test that it is installed
  @@asserted ||= false
  assert_rgen_installed() unless @@asserted
  @@asserted = true
  require 'puppet/parser/e4_parser_adapter'
  require 'puppet/pops/parser/code_merger'
  E4ParserAdapter.new(file_watcher)
end

.parser(environment) ⇒ Object

Produces a parser instance for the given environment



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# File 'lib/puppet/parser/parser_factory.rb', line 11

def self.parser(environment)
  case Puppet[:parser]
  when 'future'
    if Puppet[:evaluator] == 'future'
      evaluating_parser(environment)
    else
      eparser(environment)
    end
  else
    classic_parser(environment)
  end
end