Class: Puppet::Parser::Scope

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Resource::TypeCollectionHelper, Util::Errors, Util::MethodHelper
Defined in:
lib/puppet/parser/scope.rb

Overview

This class is part of the internal parser/evaluator/compiler functionality of Puppet. It is passed between the various classes that participate in evaluation. None of its methods are API except those that are clearly marked as such.

Defined Under Namespace

Classes: Ephemeral, LocalScope, MatchScope

Constant Summary collapse

AST = 
Puppet::Parser::AST
BUILT_IN_VARS =

Variables that always exist with nil value even if not set

['module_name'.freeze, 'caller_module_name'.freeze].freeze
RESERVED_VARIABLE_NAMES = 
['trusted', 'facts'].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util::Errors

#adderrorcontext, #devfail, #error_context, #exceptwrap, #fail

Methods included from Resource::TypeCollectionHelper

#known_resource_types

Methods included from Util::MethodHelper

#requiredopts, #set_options, #symbolize_options

Constructor Details

#initialize(compiler, options = {}) ⇒ Scope

Initialize our new scope. Defaults to having no parent.

Raises:



279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
 
# File 'lib/puppet/parser/scope.rb', line 279

def initialize(compiler, options = {})
  if compiler.is_a? Puppet::Parser::Compiler
    self.compiler = compiler
  else
    raise Puppet::DevError, "you must pass a compiler instance to a new scope object"
  end

  if n = options.delete(:namespace)
    @namespaces = [n.freeze].freeze
  else
    @namespaces = ["".freeze].freeze
  end

  raise Puppet::DevError, "compiler passed in options" if options.include? :compiler
  set_options(options)

  extend_with_functions_module

  # The symbol table for this scope.  This is where we store variables.
  #    @symtable = Ephemeral.new(nil, true)
  @symtable = LocalScope.new(nil)

  @ephemeral = [ MatchScope.new(@symtable, nil) ]

  # All of the defaults set for types.  It's a hash of hashes,
  # with the first key being the type, then the second key being
  # the parameter.
  @defaults = Hash.new { |dhash,type|
    dhash[type] = {}
  }

  # The table for storing class singletons.  This will only actually
  # be used by top scopes and node scopes.
  @class_scopes = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



794
795
796
797
798
799
800
801
802
803
804
805
806
 
# File 'lib/puppet/parser/scope.rb', line 794

def method_missing(method, *args, &block)
  method.to_s =~ /^function_(.*)$/
  name = $1
  super unless name
  super unless Puppet::Parser::Functions.function(name)
  # In odd circumstances, this might not end up defined by the previous
  # method, so we might as well be certain.
  if respond_to? method
    send(method, *args)
  else
    raise Puppet::DevError, "Function #{name} not defined despite being loaded!"
  end
end

Instance Attribute Details

#compiler ⇒ Object 



33
34
35
 
# File 'lib/puppet/parser/scope.rb', line 33

def compiler
  @compiler
end

#defaults ⇒ Object (readonly)

Hash of hashes of default values per type name



38
39
40
 
# File 'lib/puppet/parser/scope.rb', line 38

def defaults
  @defaults
end

#namespaces ⇒ Object (readonly) 



35
36
37
 
# File 'lib/puppet/parser/scope.rb', line 35

def namespaces
  @namespaces
end

#parent ⇒ Object 



34
35
36
 
# File 'lib/puppet/parser/scope.rb', line 34

def parent
  @parent
end

#resource ⇒ Object 



32
33
34
 
# File 'lib/puppet/parser/scope.rb', line 32

def resource
  @resource
end

#source ⇒ Object 



32
33
34
 
# File 'lib/puppet/parser/scope.rb', line 32

def source
  @source
end

Class Method Details

.number?(value) ⇒ Boolean

Coerce value to a number, or return ‘nil` if it isn’t one.

Returns:

  • (Boolean) 


234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
 
# File 'lib/puppet/parser/scope.rb', line 234

def self.number?(value)
  case value
  when Numeric
    value
  when /^-?\d+(:?\.\d+|(:?\.\d+)?e\d+)$/
    value.to_f
  when /^0x[0-9a-f]+$/i
    value.to_i(16)
  when /^0[0-7]+$/
    value.to_i(8)
  when /^-?\d+$/
    value.to_i
  else
    nil
  end
end

.true?(value) ⇒ Boolean

Is the value true? This allows us to control the definition of truth in one place.

Returns:

  • (Boolean) 


222
223
224
225
226
227
228
229
230
231
 
# File 'lib/puppet/parser/scope.rb', line 222

def self.true?(value)
  case value
  when ''
    false
  when :undef
    false
  else
    !!value
  end
end

Instance Method Details

#[](varname, options = {}) ⇒ Object

Retrieves the variable value assigned to the name given as an argument. The name must be a String, and namespace can be qualified with ‘::’. The value is looked up in this scope, its parent scopes, or in a specific visible named scope.

Parameters:

  • varname (String) —

    the name of the variable (may be a qualified name using ‘(ns’::‘)*varname`

  • options (Hash) (defaults to: {}) —

    Additional options, not part of api.

Returns:

  • (Object) —

    the value assigned to the given varname

See Also:



437
438
439
 
# File 'lib/puppet/parser/scope.rb', line 437

def [](varname, options={})
  lookupvar(varname, options)
end

#[]=(varname, value, options = {}) ⇒ Object

Sets the variable value of the name given as an argument to the given value. The value is set in the current scope and may shadow a variable with the same name in a visible outer scope. It is illegal to re-assign a variable in the same scope. It is illegal to set a variable in some other scope/namespace than the scope passed to a method.

Parameters:

  • varname (String) —

    The variable name to which the value is assigned. Must not contain ‘::`

  • value (String) —

    The value to assign to the given variable name.

  • options (Hash) (defaults to: {}) —

    Additional options, not part of api.



700
701
702
 
# File 'lib/puppet/parser/scope.rb', line 700

def []=(varname, value, options = {})
  setvar(varname, value, options = {})
end

#bound?(name) ⇒ Boolean

Returns true if the given name is bound in the current (most nested) scope for assignments.

Returns:

  • (Boolean) 


215
216
217
218
 
# File 'lib/puppet/parser/scope.rb', line 215

def bound?(name)
  # Do not look in ephemeral (match scope), the semantics is to answer if an assignable variable is bound
  effective_symtable(false).bound?(name)
end

#class_scope(klass) ⇒ Object

Return the scope associated with a class. This is just here so that subclasses can set their parent scopes to be the scope of their parent class, and it’s also used when looking up qualified variables.



329
330
331
332
333
 
# File 'lib/puppet/parser/scope.rb', line 329

def class_scope(klass)
  # They might pass in either the class or class name
  k = klass.respond_to?(:name) ? klass.name : klass
  @class_scopes[k] || (parent && parent.class_scope(k))
end

#class_set(name, scope) ⇒ Object

Store the fact that we’ve evaluated a class, and store a reference to the scope in which it was evaluated, so that we can look it up later.



317
318
319
320
321
322
323
 
# File 'lib/puppet/parser/scope.rb', line 317

def class_set(name, scope)
  if parent
    parent.class_set(name, scope)
  else
    @class_scopes[name] = scope
  end
end

#define_settings(type, params) ⇒ Object

Set defaults for a type. The typename should already be downcased, so that the syntax is isolated. We don’t do any kind of type-checking here; instead we let the resource do it when the defaults are used.



576
577
578
579
580
581
582
583
584
585
586
587
588
 
# File 'lib/puppet/parser/scope.rb', line 576

def define_settings(type, params)
  table = @defaults[type]

  # if we got a single param, it'll be in its own array
  params = [params] unless params.is_a?(Array)

  params.each { |param|
    if table.include?(param.name)
      raise Puppet::ParseError.new("Default already defined for #{type} { #{param.name} }; cannot redefine", param.line, param.file)
    end
    table[param.name] = param
  }
end

#effective_symtable(use_ephemeral) ⇒ Object

Return the effective “table” for setting variables. This method returns the first ephemeral “table” that acts as a local scope, or this scope’s symtable. If the parameter ‘use_ephemeral` is true, the “top most” ephemeral “table” will be returned (irrespective of it being a match scope or a local scope).

Parameters:

  • use_ephemeral (Boolean) —

    whether the top most ephemeral (of any kind) should be used or not



677
678
679
680
681
682
683
684
685
686
687
 
# File 'lib/puppet/parser/scope.rb', line 677

def effective_symtable(use_ephemeral)
  s = @ephemeral.last
  if use_ephemeral
    return s || @symtable
  else
    while s && !s.is_local_scope?()
      s = s.parent
    end
    s || @symtable
  end
end

#enclosing_scope ⇒ Puppet::Parser::Scope

The enclosing scope (topscope or nodescope) of this scope. The enclosing scopes are produced when a class or define is included at some point. The parent scope of the included class or define becomes the scope in which it was included. The chain of parent scopes is followed until a node scope or the topscope is found

Returns:



460
461
462
463
464
465
466
467
468
469
470
 
# File 'lib/puppet/parser/scope.rb', line 460

def enclosing_scope
  if has_enclosing_scope?
    if parent.is_topscope? or parent.is_nodescope?
      parent
    else
      parent.enclosing_scope
    end
  else
    nil
  end
end

#ephemeral_from(match, file = nil, line = nil) ⇒ Object 



762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
 
# File 'lib/puppet/parser/scope.rb', line 762

def ephemeral_from(match, file = nil, line = nil)
  case match
  when Hash
    # Create local scope ephemeral and set all values from hash
    new_ephemeral(true)
    match.each {|k,v| setvar(k, v, :file => file, :line => line, :ephemeral => true) }
    # Must always have an inner match data scope (that starts out as transparent)
    # In 3x slightly wasteful, since a new nested scope is created for a match 
    # (TODO: Fix that problem)
    new_ephemeral(false)
  else
    raise(ArgumentError,"Invalid regex match data. Got a #{match.class}") unless match.is_a?(MatchData)
    # Create a match ephemeral and set values from match data
    new_match_scope(match)
  end
end

#ephemeral_level ⇒ Object 



738
739
740
 
# File 'lib/puppet/parser/scope.rb', line 738

def ephemeral_level
  @ephemeral.size
end

#exist?(name) ⇒ Boolean

Returns true if the variable of the given name is set to any value (including nil)

Returns:

  • (Boolean) —

    if variable exists or not



190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
 
# File 'lib/puppet/parser/scope.rb', line 190

def exist?(name)
  # Note !! ensure the answer is boolean
  !! if name =~ /^(.*)::(.+)$/
    class_name = $1
    variable_name = $2
    return true if class_name == '' && BUILT_IN_VARS.include?(variable_name)

    # lookup class, but do not care if it is not evaluated since that will result
    # in it not existing anyway. (Tests may run with just scopes and no evaluated classes which
    # will result in class_scope for "" not returning topscope).
    klass = find_hostclass(class_name)
    other_scope = klass.nil? ? nil : class_scope(klass)
    if other_scope.nil?
      class_name == '' ? compiler.topscope.exist?(variable_name) : false
    else
      other_scope.exist?(variable_name)
    end
  else
    next_scope = inherited_scope || enclosing_scope
    effective_symtable(true).include?(name) || next_scope && next_scope.exist?(name) || BUILT_IN_VARS.include?(name)
  end
end

#find_builtin_resource_type(type) ⇒ Object 



785
786
787
 
# File 'lib/puppet/parser/scope.rb', line 785

def find_builtin_resource_type(type)
  Puppet::Type.type(type.to_s.downcase.to_sym)
end

#find_defined_resource_type(type) ⇒ Object 



789
790
791
 
# File 'lib/puppet/parser/scope.rb', line 789

def find_defined_resource_type(type)
  known_resource_types.find_definition(type.to_s.downcase)
end

#find_definition(name) ⇒ Object 



255
256
257
 
# File 'lib/puppet/parser/scope.rb', line 255

def find_definition(name)
  known_resource_types.find_definition(name)
end

#find_global_scope ⇒ Object 



259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
 
# File 'lib/puppet/parser/scope.rb', line 259

def find_global_scope()
  # walk upwards until first found node_scope or top_scope
  if is_nodescope? || is_topscope?
    self
  else
    next_scope = inherited_scope || enclosing_scope
    if next_scope.nil?
      # this happens when testing, and there is only a single test scope and no link to any
      # other scopes
      self
    else
      next_scope.find_global_scope()
    end
  end
end

#find_hostclass(name) ⇒ Object 



251
252
253
 
# File 'lib/puppet/parser/scope.rb', line 251

def find_hostclass(name)
  known_resource_types.find_hostclass(name)
end

#find_resource_type(type) ⇒ Object 



779
780
781
782
783
 
# File 'lib/puppet/parser/scope.rb', line 779

def find_resource_type(type)
  # It still works fine without the type == 'class' short-cut, but it is a lot slower.
  return nil if ["class", "node"].include? type.to_s.downcase
  find_builtin_resource_type(type) || find_defined_resource_type(type)
end

#include?(name) ⇒ Boolean

Returns true if the variable of the given name has a non nil value. TODO: This has vague semantics - does the variable exist or not?

use ['name'] to get nil or value, and if nil check with exist?('name')
this include? is only useful because of checking against the boolean value false.

Returns:

  • (Boolean) 


182
183
184
 
# File 'lib/puppet/parser/scope.rb', line 182

def include?(name)
  ! self[name].nil?
end

#inherited_scope ⇒ Puppet::Parser::Scope

The scope of the inherited thing of this scope’s resource. This could either be a node that was inherited or the class.

Returns:



445
446
447
448
449
450
451
 
# File 'lib/puppet/parser/scope.rb', line 445

def inherited_scope
  if has_inherited_class?
    qualified_scope(resource.resource_type.parent)
  else
    nil
  end
end

#is_classscope? ⇒ Boolean

Returns:

  • (Boolean) 


472
473
474
 
# File 'lib/puppet/parser/scope.rb', line 472

def is_classscope?
  resource and resource.type == "Class"
end

#is_nodescope? ⇒ Boolean

Returns:

  • (Boolean) 


476
477
478
 
# File 'lib/puppet/parser/scope.rb', line 476

def is_nodescope?
  resource and resource.type == "Node"
end

#is_topscope? ⇒ Boolean

Returns:

  • (Boolean) 


480
481
482
 
# File 'lib/puppet/parser/scope.rb', line 480

def is_topscope?
  compiler and self == compiler.topscope
end

#lookup_as_local_name?(class_name, variable_name) ⇒ Boolean

Handles the special case of looking up fully qualified variable in not yet evaluated top scope This is ok if the lookup request originated in topscope (this happens when evaluating bindings; using the top scope to provide the values for facts.

Parameters:

  • class_name (String) —

    the classname part of a variable name, may be special “”

  • variable_name (String) —

    the variable name without the absolute leading ‘::’

Returns:

  • (Boolean) —

    true if the given variable name should be looked up directly in this scope



514
515
516
517
518
519
520
 
# File 'lib/puppet/parser/scope.rb', line 514

def lookup_as_local_name?(class_name, variable_name)
  # not a local if name has more than one segment
  return nil if variable_name =~ /::/
  # partial only if the class for "" cannot be found
  return nil unless class_name == "" && klass = find_hostclass(class_name) && class_scope(klass).nil?
  is_topscope?
end

#lookup_qualified_variable(class_name, variable_name, position) ⇒ Object 



484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
 
# File 'lib/puppet/parser/scope.rb', line 484

def lookup_qualified_variable(class_name, variable_name, position)
  begin
    if lookup_as_local_name?(class_name, variable_name)
      self[variable_name]
    else
      qualified_scope(class_name).lookupvar(variable_name, position)
    end
  rescue RuntimeError => e
    unless Puppet[:strict_variables]
      # Do not issue warning if strict variables are on, as an error will be raised by variable_not_found
      location = if position[:lineproc]
                   " at #{position[:lineproc].call}"
                 elsif position[:file] && position[:line]
                   " at #{position[:file]}:#{position[:line]}"
                 else
                   ""
                 end
      warning "Could not look up qualified variable '#{class_name}::#{variable_name}'; #{e.message}#{location}"
    end
    variable_not_found("#{class_name}::#{variable_name}", e.message)
  end
end

#lookupdefaults(type) ⇒ Object

Collect all of the defaults set at any higher scopes. This is a different type of lookup because it’s additive – it collects all of the defaults, with defaults in closer scopes overriding those in later scopes.

The lookupdefaults searches in the the order:

* inherited
* contained (recursive)
* self



346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
 
# File 'lib/puppet/parser/scope.rb', line 346

def lookupdefaults(type)
  values = {}

  # first collect the values from the parents
  if parent
    parent.lookupdefaults(type).each { |var,value|
      values[var] = value
    }
  end

  # then override them with any current values
  # this should probably be done differently
  if @defaults.include?(type)
    @defaults[type].each { |var,value|
      values[var] = value
    }
  end

  values
end

#lookuptype(name) ⇒ Object

Look up a defined type.



368
369
370
371
 
# File 'lib/puppet/parser/scope.rb', line 368

def lookuptype(name)
  # This happens a lot, avoid making a call to make a call
  known_resource_types.find_definition(name) || known_resource_types.find_hostclass(name)
end

#lookupvar(name, options = {}) ⇒ Object

Lookup a variable within this scope using the Puppet language’s scoping rules. Variables can be qualified using just as in a manifest.

Parameters:

  • name (String) —

    the variable name to lookup

Returns:

  • Object the value of the variable, or nil if it’s not found



390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
 
# File 'lib/puppet/parser/scope.rb', line 390

def lookupvar(name, options = {})
  unless name.is_a? String
    raise Puppet::ParseError, "Scope variable name #{name.inspect} is a #{name.class}, not a string"
  end

  table = @ephemeral.last

  if name =~ /^(.*)::(.+)$/
    class_name = $1
    variable_name = $2
    lookup_qualified_variable(class_name, variable_name, options)

  # TODO: optimize with an assoc instead, this searches through scopes twice for a hit
  elsif table.include?(name)
    table[name]
  else
    next_scope = inherited_scope || enclosing_scope
    if next_scope
      next_scope.lookupvar(name, options)
    else
      variable_not_found(name)
    end
  end
end

#new_ephemeral(local_scope = false) ⇒ Object

TODO: Who calls this?



743
744
745
746
747
748
749
 
# File 'lib/puppet/parser/scope.rb', line 743

def new_ephemeral(local_scope = false)
  if local_scope
    @ephemeral.push(LocalScope.new(@ephemeral.last))
  else
    @ephemeral.push(MatchScope.new(@ephemeral.last, nil))
  end
end

#new_match_scope(match_data) ⇒ Object

Nests a match data scope



758
759
760
 
# File 'lib/puppet/parser/scope.rb', line 758

def new_match_scope(match_data)
  @ephemeral.push(MatchScope.new(@ephemeral.last, match_data))
end

#newscope(options = {}) ⇒ Object

Create a new scope and set these options.



563
564
565
 
# File 'lib/puppet/parser/scope.rb', line 563

def newscope(options = {})
  compiler.newscope(self, options)
end

#parent_module_name ⇒ Object 



567
568
569
570
571
 
# File 'lib/puppet/parser/scope.rb', line 567

def parent_module_name
  return nil unless @parent
  return nil unless @parent.source
  @parent.source.module_name
end

#resolve_type_and_titles(type, titles) ⇒ Object

Raises:

  • (ArgumentError) 


808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
 
# File 'lib/puppet/parser/scope.rb', line 808

def resolve_type_and_titles(type, titles)
  raise ArgumentError, "titles must be an array" unless titles.is_a?(Array)

  case type.downcase
  when "class"
    # resolve the titles
    titles = titles.collect do |a_title|
      hostclass = find_hostclass(a_title)
      hostclass ?  hostclass.name : a_title
    end
  when "node"
    # no-op
  else
    # resolve the type
    resource_type = find_resource_type(type)
    type = resource_type.name if resource_type
  end

  return [type, titles]
end

#set_facts(hash) ⇒ Object 



640
641
642
 
# File 'lib/puppet/parser/scope.rb', line 640

def set_facts(hash)
  setvar('facts', deep_freeze(hash), :privileged => true)
end

#set_match_data(match_data) ⇒ Object

Sets match data in the most nested scope (which always is a MatchScope), it clobbers match data already set there



753
754
755
 
# File 'lib/puppet/parser/scope.rb', line 753

def set_match_data(match_data)
  @ephemeral.last.match_data = match_data
end

#set_server_facts(hash) ⇒ Object 



644
645
646
 
# File 'lib/puppet/parser/scope.rb', line 644

def set_server_facts(hash)
  setvar('server_facts', deep_freeze(hash), :privileged => true)
end

#set_trusted(hash) ⇒ Object 



636
637
638
 
# File 'lib/puppet/parser/scope.rb', line 636

def set_trusted(hash)
  setvar('trusted', deep_freeze(hash), :privileged => true)
end

#setvar(name, value, options = {}) ⇒ Object

Set a variable in the current scope. This will override settings in scopes above, but will not allow variables in the current scope to be reassigned.

It's preferred that you use self[]= instead of this; only use this

when you need to set options.



597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
 
# File 'lib/puppet/parser/scope.rb', line 597

def setvar(name, value, options = {})
  if name =~ /^[0-9]+$/
    raise Puppet::ParseError.new("Cannot assign to a numeric match result variable '$#{name}'") # unless options[:ephemeral]
  end
  unless name.is_a? String
    raise Puppet::ParseError, "Scope variable name #{name.inspect} is a #{name.class}, not a string"
  end

  # Check for reserved variable names
  if !options[:privileged] && RESERVED_VARIABLE_NAMES.include?(name)
    raise Puppet::ParseError, "Attempt to assign to a reserved variable name: '#{name}'"
  end

  # Check for server_facts reserved variable name if the trusted_sever_facts setting is true
  if Puppet[:trusted_server_facts] && name == 'server_facts' && !options[:privileged]
    raise Puppet::ParseError, "Attempt to assign to a reserved variable name: '#{name}'"
  end

  table = effective_symtable(options[:ephemeral])
  if table.bound?(name)
    if options[:append]
      error = Puppet::ParseError.new("Cannot append, variable '$#{name}' is defined in this scope")
    else
      error = Puppet::ParseError.new("Cannot reassign variable '$#{name}'")
    end
    error.file = options[:file] if options[:file]
    error.line = options[:line] if options[:line]
    raise error
  end

  if options[:append]
    # produced result (value) is the resulting appended value, note: the table[]= does not return the value
    table[name] = (value = append_value(undef_as('', self[name]), value))
  else
    table[name] = value
  end
  value
end

#to_hash(recursive = true) ⇒ Object

Returns a Hash containing all variables and their values, optionally (and by default) including the values defined in parent. Local values shadow parent values. Ephemeral scopes for match results ($0 - $n) are not included.



543
544
545
546
547
548
549
550
551
552
553
554
555
556
 
# File 'lib/puppet/parser/scope.rb', line 543

def to_hash(recursive = true)
  if recursive and has_enclosing_scope?
    target = enclosing_scope.to_hash(recursive)
    if !(inherited = inherited_scope).nil?
      target.merge!(inherited.to_hash(recursive))
    end
  else
    target = Hash.new
  end

  # add all local scopes
  @ephemeral.last.add_entries_to(target)
  target
end

#to_s ⇒ Object

Used mainly for logging



723
724
725
 
# File 'lib/puppet/parser/scope.rb', line 723

def to_s
  "Scope(#{@resource})"
end

#transform_and_assert_classnames(names) ⇒ Array<String>

Transforms references to classes to the form suitable for lookup in the compiler.

Makes names passed in the names array absolute if they are relative.

Transforms Class[] and Resource[] type references to class name or raises an error if a Class[] is unspecific, if a Resource is not a ‘class’ resource, or if unspecific (no title).

Parameters:

  • names (Array<String>) —

    names to (optionally) make absolute

Returns:

  • (Array<String>) —

    names after transformation



842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
 
# File 'lib/puppet/parser/scope.rb', line 842

def transform_and_assert_classnames(names)
  names.map do |name|
    case name
    when String
      name.sub(/^([^:]{1,2})/, '::\1')

    when Puppet::Resource
      assert_class_and_title(name.type, name.title)
      name.title.sub(/^([^:]{1,2})/, '::\1')

    when Puppet::Pops::Types::PHostClassType
      raise ArgumentError, "Cannot use an unspecific Class[] Type" unless name.class_name
      name.class_name.sub(/^([^:]{1,2})/, '::\1')

    when Puppet::Pops::Types::PResourceType
      assert_class_and_title(name.type_name, name.title)
      name.title.sub(/^([^:]{1,2})/, '::\1')
    end
  end
end

#undef_as(x, v) ⇒ Object 



373
374
375
376
377
378
379
 
# File 'lib/puppet/parser/scope.rb', line 373

def undef_as(x,v)
  if v.nil? or v == :undef
    x
  else
    v
  end
end

#unset_ephemeral_var(level = :all) ⇒ Object

remove ephemeral scope up to level TODO: Who uses :all ? Remove ??



730
731
732
733
734
735
736
 
# File 'lib/puppet/parser/scope.rb', line 730

def unset_ephemeral_var(level=:all)
  if level == :all
    @ephemeral = [ MatchScope.new(@symtable, nil)]
  else
    @ephemeral.pop(@ephemeral.size - level)
  end
end

#variable_not_found(name, reason = nil) ⇒ Object 



415
416
417
418
419
420
421
422
423
424
425
 
# File 'lib/puppet/parser/scope.rb', line 415

def variable_not_found(name, reason=nil)
  # Built in variables always exist
  if BUILT_IN_VARS.include?(name)
    return nil
  end
  if Puppet[:strict_variables]
    throw :undefined_variable
  else
    nil
  end
end