Module: PuppetX::Keystone::CompositeNamevar::Helpers::Utilities

Defined in:
lib/puppet_x/keystone/composite_namevar/helpers/utilities.rb

Instance Method Summary collapse

Instance Method Details

#prefetch_composite(resources) ⇒ Object 



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# File 'lib/puppet_x/keystone/composite_namevar/helpers/utilities.rb', line 6

def prefetch_composite(resources)
  # cannot trust puppet for correct resources with semantic title
  res = resources.values.first
  catalog = res.catalog
  klass   = res.class
  required_resources = catalog.resources.find_all do |e|
    e.class.to_s == klass.to_s
  end

  # hash catalog resource by uniq key
  required_res = Hash[required_resources.map(&:uniqueness_key)
    .zip(required_resources)]
  # This is the sort order returned by uniqueness_key.
  namevars_ordered = resource_type.key_attributes.map(&:to_s).sort
  existings = instances
  # uniqueness_key sort by lexical order of the key attributes
  required_res.each do |res_key, resource|
    provider = existings.find do |existing|
      if block_given?
        # transformation is done on the name using namevar,
        # so we let the user transform it the correct way.
        res_transformed_namevar = yield(res_key)
        # name in self.instance is assumed to have the same
        # transformation than the one given by the user.
        exist_transformed_namevar = existing.name
        res_transformed_namevar == exist_transformed_namevar
      else
        res_key == namevars_ordered
          .map { |namevar| existing.send(namevar) }
      end
    end
    resource.provider = provider if provider
  end
end