Class: Puppet::Parser::AST::ResourceOverride

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

Overview

Set a parameter on a resource specification created somewhere else in the configuration. The object is responsible for verifying that this is allowed.

Instance Attribute Summary collapse

Attributes inherited from Branch

#children, #pin

Instance Method Summary collapse

Constructor Details

#initialize(hash) ⇒ ResourceOverride

Create our ResourceDef. Handles type checking for us.



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# File 'lib/puppet/parser/ast/resource_override.rb', line 57

def initialize(hash)
  @checked = false
  super
end

Instance Attribute Details

#object ⇒ Object 



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# File 'lib/puppet/parser/ast/resource_override.rb', line 10

def object
  @object
end

#parameters ⇒ Object 



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# File 'lib/puppet/parser/ast/resource_override.rb', line 10

def parameters
  @parameters
end

Instance Method Details

#each ⇒ Object

Iterate across all of our children.



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# File 'lib/puppet/parser/ast/resource_override.rb', line 13

def each
  [@object,@parameters].flatten.each { |param|
    #Puppet.debug("yielding param #{param}")
    yield param
  }
end

#evaluate(scope) ⇒ Object

Does not actually return an object; instead sets an object in the current scope.



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# File 'lib/puppet/parser/ast/resource_override.rb', line 22

def evaluate(scope)
  # Get our object reference.
  resource = @object.safeevaluate(scope)

  # Evaluate all of the specified params.
  params = @parameters.collect { |param|
    param.safeevaluate(scope)
  }

  # Now we just create a normal resource, but we call a very different
  # method on the scope.
  resource = [resource] unless resource.is_a?(Array)

  resource = resource.collect do |r|

    res = Puppet::Parser::Resource.new(
    r.type, r.title,
      :parameters => params,
      :file => file,
      :line => line,
      :source => scope.source,
      :scope => scope
    )

    # Now we tell the scope that it's an override, and it behaves as
    # necessary.
    scope.compiler.add_override(res)

    res
  end
  # decapsulate array in case of only one item
  return(resource.length == 1 ? resource.pop : resource)
end