module Puppet::Pops::Evaluator::ExternalSyntaxSupport

This module is an integral part of the evaluator. It deals with the concern of validating external syntax in text produced by heredoc and templates.

Constants

TYPES: TODO: This can be simplified if the Factory directly supporteded hash_of/type_of

Public Instance Methods

assert_external_syntax(scope, result, syntax, reference_expr) click to toggle source

# File lib/puppet/pops/evaluator/external_syntax_support.rb, line 8
def assert_external_syntax(scope, result, syntax, reference_expr)
  @@HASH_OF_SYNTAX_CHECKERS ||= TYPES.hash_of(TYPES.type_of(::Puppetx::SYNTAX_CHECKERS_TYPE))
  # ignore 'unspecified syntax'
  return if syntax.nil? || syntax == ''

  checker = checker_for_syntax(scope, syntax)
  # ignore syntax with no matching checker
  return unless checker

  # Call checker and give it the location information from the expression
  # (as opposed to where the heredoc tag is (somewhere on the line above)).
  acceptor = Puppet::Pops::Validation::Acceptor.new()
  source_pos = find_closest_positioned(reference_expr)
  checker.check(result, syntax, acceptor, source_pos)

  if acceptor.error_count > 0
    checker_message = "Invalid produced text having syntax: '#{syntax}'."
    Puppet::Pops::IssueReporter.assert_and_report(acceptor, :message => checker_message)
    raise ArgumentError, "Internal Error: Configuration of runtime error handling wrong: should have raised exception"
  end
end

checker_for_syntax(scope, syntax) click to toggle source

Finds the most significant checker for the given syntax (most significant is to the right). Returns nil if there is no registered checker.

# File lib/puppet/pops/evaluator/external_syntax_support.rb, line 33
def checker_for_syntax(scope, syntax)
  checkers_hash = scope.compiler.injector.lookup(scope, @@HASH_OF_SYNTAX_CHECKERS, ::Puppetx::SYNTAX_CHECKERS) || {}
  checkers_hash[lookup_keys_for_syntax(syntax).find {|x| checkers_hash[x] }]
end

lookup_keys_for_syntax(syntax) click to toggle source

Returns an array of possible syntax names

# File lib/puppet/pops/evaluator/external_syntax_support.rb, line 39
def lookup_keys_for_syntax(syntax)
  segments = syntax.split(/\+/)
  result = []
  begin
    result << segments.join("+")
    segments.shift
  end until segments.empty?
  result
end