Class: Puppet::Parser::AST::Resource

Inherits:
Branch show all
Defined in:
lib/puppet/parser/ast/resource.rb

Overview

Instruction for Resource instantiation. Instantiates resources of both native and user defined types.

Constant Summary

Constants inherited from Puppet::Parser::AST

AST

Instance Attribute Summary collapse

Attributes inherited from Branch

#children, #pin

Attributes inherited from Puppet::Parser::AST

#file, #line, #parent, #pos, #scope

Instance Method Summary collapse

Methods inherited from Branch

#each, #initialize

Methods inherited from Puppet::Parser::AST

#initialize, #inspect, #safeevaluate

Methods included from Util::MethodHelper

#requiredopts, #set_options, #symbolize_options

Methods included from Util::Errors

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

Constructor Details

This class inherits a constructor from Puppet::Parser::AST::Branch

Instance Attribute Details

#exported ⇒ Object 



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# File 'lib/puppet/parser/ast/resource.rb', line 6

def exported
  @exported
end

#instances ⇒ Object 



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# File 'lib/puppet/parser/ast/resource.rb', line 6

def instances
  @instances
end

#type ⇒ Object 



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# File 'lib/puppet/parser/ast/resource.rb', line 6

def type
  @type
end

#virtual ⇒ Object 



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# File 'lib/puppet/parser/ast/resource.rb', line 6

def virtual
  @virtual
end

Instance Method Details

#evaluate(scope) ⇒ Object

Evaluates resources by adding them to the compiler for lazy evaluation and returning the produced resource references.



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

def evaluate(scope)
  # We want virtual to be true if exported is true.  We can't
  # just set :virtual => self.virtual in the initialization,
  # because sometimes the :virtual attribute is set *after*
  # :exported, in which case it clobbers :exported if :exported
  # is true.  Argh, this was a very tough one to track down.
  virt = self.virtual || self.exported

  # First level of implicit iteration: build a resource for each
  # instance.  This handles things like:
  # file { '/foo': owner => blah; '/bar': owner => blah }
  @instances.map do |instance|

    # Evaluate all of the specified params.
    paramobjects = instance.parameters.map { |param| param.safeevaluate(scope) }

    resource_titles = instance.title.safeevaluate(scope)

    # it's easier to always use an array, even for only one name
    resource_titles = [resource_titles] unless resource_titles.is_a?(Array)

    fully_qualified_type, resource_titles = scope.resolve_type_and_titles(type, resource_titles)

    # Second level of implicit iteration; build a resource for each
    # title.  This handles things like:
    # file { ['/foo', '/bar']: owner => blah }
    resource_titles.flatten.map do |resource_title|
      exceptwrap :type => Puppet::ParseError do
        resource = Puppet::Parser::Resource.new(
        fully_qualified_type, resource_title,
          :parameters => paramobjects,
          :file => self.file,
          :line => self.line,
          :exported => self.exported,
          :virtual => virt,
          :source => scope.source,
          :scope => scope,
          :strict => true
        )

        if resource.resource_type.is_a? Puppet::Resource::Type
          resource.resource_type.instantiate_resource(scope, resource)
        end
        scope.compiler.add_resource(scope, resource)
        scope.compiler.evaluate_classes([resource_title], scope, false) if fully_qualified_type == 'class'
        resource
      end
    end
  end.flatten.reject { |resource| resource.nil? }
end