Class: Puppet::Parser::E4ParserAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/parser/e4_parser_adapter.rb

Overview

Adapts an egrammar/eparser to respond to the public API of the classic parser and makes use of the new evaluator.

Defined Under Namespace

Classes: NullFileWatcher

Instance Method Summary collapse

Constructor Details

#initialize(file_watcher = nil) ⇒ E4ParserAdapter

Returns a new instance of E4ParserAdapter.

Parameters:

  • file_watcher (#watch_file) (defaults to: nil) —

    something that can watch a file



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# File 'lib/puppet/parser/e4_parser_adapter.rb', line 18

def initialize(file_watcher = nil)
  @file_watcher = file_watcher || NullFileWatcher.new
  @file = ''
  @string = ''
  @use = :unspecified
  @@evaluating_parser ||= Puppet::Pops::Parser::EvaluatingParser.new()
end

Instance Method Details

#file=(file) ⇒ Object 



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# File 'lib/puppet/parser/e4_parser_adapter.rb', line 26

def file=(file)
  @file = file
  @use = :file
  # watch if possible, but only if the file is something worth watching
  @file_watcher.watch_file(file) if !file.nil? && file != ''
end

#parse(string = nil) ⇒ Object 



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# File 'lib/puppet/parser/e4_parser_adapter.rb', line 33

def parse(string = nil)
  self.string= string if string

  if @file =~ /\.rb$/ && @use != :string
    # Will throw an error
    parse_ruby_file
  end

  parse_result =
  if @use == :string
    # Parse with a source_file to set in created AST objects (it was either given, or it may be unknown
    # if caller did not set a file and the present a string.
    #
    @@evaluating_parser.parse_string(@string, @file || "unknown-source-location")
  else
    @@evaluating_parser.parse_file(@file)
  end

  # the parse_result may be
  # * empty / nil (no input)
  # * a Model::Program
  # * a Model::Expression
  #
  model = parse_result.nil? ? nil : parse_result.current 
  args = {}
  Puppet::Pops::Model::AstTransformer.new(@file).merge_location(args, model)

  ast_code =
  if model.is_a? Puppet::Pops::Model::Program
    Puppet::Parser::AST::PopsBridge::Program.new(model, args)
  else
    args[:value] = model
    Puppet::Parser::AST::PopsBridge::Expression.new(args)
  end

  # Create the "main" class for the content - this content will get merged with all other "main" content
  Puppet::Parser::AST::Hostclass.new('', :code => ast_code)

end

#parse_ruby_file ⇒ Object

Raises:



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# File 'lib/puppet/parser/e4_parser_adapter.rb', line 78

def parse_ruby_file
  raise Puppet::ParseError, "Ruby DSL is no longer supported. Attempt to parse #{@file}"
end

#string=(string) ⇒ Object 



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# File 'lib/puppet/parser/e4_parser_adapter.rb', line 73

def string=(string)
  @string = string
  @use = :string
end