Class: Puppet::Pops::Parser::EvaluatingParser

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

Overview

Does not support “import” and parsing ruby files

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ EvaluatingParser

Returns a new instance of EvaluatingParser.



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 6

def initialize()
  @parser = Puppet::Pops::Parser::Parser.new()
end

Class Method Details

.quote(x) ⇒ String

Translates an already parsed string that contains control characters, quotes and backslashes into a quoted string where all such constructs have been escaped. Parsing the return value of this method using the puppet parser should yield exactly the same string as the argument passed to this method

The method makes an exception for the two character sequences $ and s. They will not be escaped since they have a special meaning in puppet syntax.

Parameters:

  • x (String) —

    The string to quote and “unparse”

Returns:

  • (String) —

    The quoted string



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 134

def self.quote(x)
  escaped = '"'
  p = nil
  x.each_char do |c|
    case p
    when nil
      # do nothing
    when "\t"
      escaped << '\\t'
    when "\n"
      escaped << '\\n'
    when "\f"
      escaped << '\\f'
    # TODO: \cx is a range of characters - skip for now
    #      when "\c"
    #        escaped << '\\c'
    when '"'
      escaped << '\\"'
    when '\\'
      escaped << if c == '$' || c == 's'; p; else '\\\\'; end # don't escape \ when followed by s or $
    else
      escaped << p
    end
    p = c
  end
  escaped << p unless p.nil?
  escaped << '"'
end

Instance Method Details

#acceptor ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 52

def acceptor()
  @acceptor ||= Puppet::Pops::Validation::Acceptor.new
  @acceptor
end

#assert_and_report(parse_result) ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 61

def assert_and_report(parse_result)
  return nil unless parse_result
  # make sure the result has an origin (if parsed from a string)
  unless Puppet::Pops::Adapters::OriginAdapter.get(parse_result.model)
    Puppet::Pops::Adapters::OriginAdapter.adapt(parse_result.model).origin = @file_source
  end
  validator.validate(parse_result)

  max_errors = Puppet[:max_errors]
  max_warnings = Puppet[:max_warnings] + 1
  max_deprecations = Puppet[:max_deprecations] + 1

  # If there are warnings output them
  warnings = acceptor.warnings
  if warnings.size > 0
    formatter = Puppet::Pops::Validation::DiagnosticFormatterPuppetStyle.new
    emitted_w = 0
    emitted_dw = 0
    acceptor.warnings.each {|w|
      if w.severity == :deprecation
        # Do *not* call Puppet.deprecation_warning it is for internal deprecation, not
        # deprecation of constructs in manifests! (It is not designed for that purpose even if
        # used throughout the code base).
        #
        Puppet.warning(formatter.format(w)) if emitted_dw < max_deprecations
        emitted_dw += 1
      else
        Puppet.warning(formatter.format(w)) if emitted_w < max_warnings
        emitted_w += 1
      end
      break if emitted_w > max_warnings && emitted_dw > max_deprecations # but only then
    }
  end

  # If there were errors, report the first found. Use a puppet style formatter.
  errors = acceptor.errors
  if errors.size > 0
    formatter = Puppet::Pops::Validation::DiagnosticFormatterPuppetStyle.new
    if errors.size == 1 || max_errors <= 1
      # raise immediately
      require 'debugger'; debugger
      raise Puppet::ParseError.new(formatter.format(errors[0]))
    end
    emitted = 0
    errors.each do |e|
      Puppet.err(formatter.format(e))
      emitted += 1
      break if emitted >= max_errors
    end
    warnings_message = warnings.size > 0 ? ", and #{warnings.size} warnings" : ""
    giving_up_message = "Found #{errors.size} errors#{warnings_message}. Giving up"
    exception = Puppet::ParseError.new(giving_up_message)
    exception.file = errors[0].file
    raise exception
  end
  parse_result
end

#clear ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 41

def clear()
  @acceptor = nil
end

#evaluate(scope, model) ⇒ Object 



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

def evaluate(scope, model)
  return nil unless model
  ast = Puppet::Pops::Model::AstTransformer.new(@file_source, nil).transform(model)
  return nil unless ast
  ast.safeevaluate(scope)
end

#evaluate_file(file) ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 37

def evaluate_file(file)
  evaluate(parse_file(file))
end

#evaluate_string(scope, s, file_source = 'unknown') ⇒ Object 



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

def evaluate_string(scope, s, file_source='unknown')
  evaluate(scope, parse_string(s, file_source))
end

#parse_file(file) ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 27

def parse_file(file)
  @file_source = file
  clear()
  assert_and_report(@parser.parse_file(file))
end

#parse_string(s, file_source = 'unknown') ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 10

def parse_string(s, file_source = 'unknown')
  @file_source = file_source
  clear()
  # Handling of syntax error can be much improved (in general), now it bails out of the parser
  # and does not have as rich information (when parsing a string), need to update it with the file source
  # (ideally, a syntax error should be entered as an issue, and not just thrown - but that is a general problem
  # and an improvement that can be made in the eparser (rather than here).
  # Also a possible improvement (if the YAML parser returns positions) is to provide correct output of position.
  #
  begin
    assert_and_report(@parser.parse_string(s))
  rescue Puppet::ParseError => e
    e.file = @file_source unless e.file
    raise e
  end
end

#quote(x) ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 119

def quote(x)
  self.class.quote(x)
end

#validator ⇒ Object 



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# File 'lib/puppet/pops/parser/evaluating_parser.rb', line 57

def validator()
  @validator ||= Puppet::Pops::Validation::ValidatorFactory_3_1.new().validator(acceptor)
end