Method: Puppet::Type::RelationshipMetaparam#to_edges

Defined in:
lib/vendor/puppet/type.rb

#to_edges ⇒ Object

Create edges from each of our relationships. :in relationships are specified by the event-receivers, and :out relationships are specified by the event generator. This way ‘source’ and ‘target’ are consistent terms in both edges and events – that is, an event targets edges whose source matches the event’s source. The direction of the relationship determines which resource is applied first and which resource is considered to be the event generator.



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# File 'lib/vendor/puppet/type.rb', line 1205

def to_edges
  @value.collect do |reference|
    reference.catalog = resource.catalog

    # Either of the two retrieval attempts could have returned
    # nil.
    unless related_resource = reference.resolve
      self.fail "Could not retrieve dependency '#{reference}' of #{@resource.ref}"
    end

    # Are we requiring them, or vice versa?  See the method docs
    # for futher info on this.
    if self.class.direction == :in
      source = related_resource
      target = @resource
    else
      source = @resource
      target = related_resource
    end

    if method = self.class.callback
      subargs = {
        :event => self.class.events,
        :callback => method
      }
      self.debug("subscribes to #{related_resource.ref}")
    else
      # If there's no callback, there's no point in even adding
      # a label.
      subargs = nil
      self.debug("requires #{related_resource.ref}")
    end

    rel = Puppet::Relationship.new(source, target, subargs)
  end
end