Module: Sfn::Command::Graph::Provider::Aws

Defined in:
lib/sfn/command/graph/aws.rb

Defined Under Namespace

Classes: AwsGraphProcessor

Instance Method Summary collapse

Instance Method Details

#edge_detection(template, graph, name = "", resource_names = []) ⇒ Object 



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# File 'lib/sfn/command/graph/aws.rb', line 110

def edge_detection(template, graph, name = "", resource_names = [])
  resources = template.fetch("Resources", {})
  node_prefix = name
  resources.each do |resource_name, resource_data|
    node_name = [node_prefix, resource_name].join
    if resource_data["Type"] == "AWS::CloudFormation::Stack"
      graph.subgraph << generate_graph(
        resource_data["Properties"].delete("Stack"),
        :name => resource_name,
        :type => resource_data["Type"],
        :resource_names => resource_names,
      )
      next
    else
      graph.node(node_name).attributes << graph.fillcolor(colorize(node_prefix.empty? ? config[:file] : node_prefix).inspect)
      graph.box3d << graph.node(node_name)
    end
    graph.filled << graph.node(node_name)
    graph.node(node_name).label "#{resource_name}\n<#{resource_data["Type"]}>\n#{name}"
    resource_dependencies(resource_data, resource_names + resources.keys).each do |dep_name|
      if resources.keys.include?(dep_name)
        dep_name = [node_prefix, dep_name].join
      end
      if config[:graph_style] == "creation"
        @root_graph.edge(dep_name, node_name)
      else
        @root_graph.edge(node_name, dep_name)
      end
    end
  end
  resource_names.concat resources.keys.map { |r_name| [node_prefix, r_name].join }
end

#output_discovery(template, outputs, resource_name, parent_template, name = "") ⇒ Object 



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# File 'lib/sfn/command/graph/aws.rb', line 40

def output_discovery(template, outputs, resource_name, parent_template, name = "")
  if template["Resources"]
    template["Resources"].keys.each do |r_name|
      r_info = template["Resources"][r_name]
      if r_info["Type"] == "AWS::CloudFormation::Stack"
        output_discovery(r_info["Properties"]["Stack"], outputs, r_name, template, r_name)
      end
    end
  end
  if parent_template
    ui.debug "Pre-processing stack resource `#{resource_name}`"
    substack_parameters = Smash[
      parent_template.fetch("Resources", resource_name, "Properties", "Parameters", {}).map do |key, value|
        result = [key, value]
        if value.is_a?(Hash)
          v_key = value.keys.first
          v_value = value.values.first
          if v_key == "Fn::GetAtt" && parent_template.fetch("Resources", {}).keys.include?(v_value.first) && v_value.last.start_with?("Outputs.")
            output_key = v_value.first + "__" + v_value.last.split(".", 2).last
            ui.debug "Output key for check: #{output_key}"
            if outputs.key?(output_key)
              new_value = outputs[output_key]
              result = [key, new_value]
              ui.debug "Parameter for output swap `#{key}`: #{value} -> #{new_value}"
            end
          end
        end
        result
      end
    ]

    ui.debug "Generated internal parameters for `#{resource_name}`: #{substack_parameters}"

    processor = AwsGraphProcessor.new({},
                                      :parameters => substack_parameters)
    template["Resources"] = processor.dereference_processor(
      template["Resources"], ["Ref"]
    )
    template["Outputs"] = processor.dereference_processor(
      template["Outputs"], ["Ref"]
    )
    rename_processor = AwsGraphProcessor.new({},
                                             :parameters => Smash[
                                               template.fetch("Resources", {}).keys.map do |r_key|
                                                 [r_key, {"Ref" => [name, r_key].join}]
                                               end
                                             ])
    derefed_outs = rename_processor.dereference_processor(
      template.fetch("Outputs", {})
    ) || {}

    derefed_outs.each do |o_name, o_data|
      o_key = [name, o_name].join("__")
      outputs[o_key] = o_data["Value"]
    end
  end
  outputs.dup.each do |key, value|
    if value.is_a?(Hash)
      v_key = value.keys.first
      v_value = value.values.first
      if v_key == "Fn::GetAtt" && v_value.last.start_with?("Outputs.")
        output_key = v_value.first << "__" << v_value.last.split(".", 2).last
        if outputs.key?(output_key)
          outputs[key] = outputs[output_key]
        end
      end
    end
  end
end

#resource_dependencies(data, names) ⇒ Object 



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# File 'lib/sfn/command/graph/aws.rb', line 143

def resource_dependencies(data, names)
  case data
  when Hash
    data.map do |key, value|
      if key == "Ref" && names.include?(value)
        value
      elsif key == "DependsOn"
        [value].flatten.compact.find_all do |dependson_name|
          names.include?(dependson_name)
        end
      elsif key == "Fn::GetAtt" && names.include?(res = [value].flatten.compact.first)
        res
      else
        resource_dependencies(key, names) +
          resource_dependencies(value, names)
      end
    end.flatten.compact.uniq
  when Array
    data.map do |item|
      resource_dependencies(item, names)
    end.flatten.compact.uniq
  else
    []
  end
end