Method: Lono::Configset::Combiner#combine

Defined in:
lib/lono/configset/combiner.rb

#combine ⇒ Object 



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# File 'lib/lono/configset/combiner.rb', line 66

def combine
  # Remove duplicate configsets. Can happen if same configset is in blueprint and project.
  # Ugly because of the sets structure.
  @sets.uniq! do |array|
    registry, _ = array
    registry.name
  end

  metadata_map = {}
  configsets_map = {}

  @sets.each_with_index do |array, i|
    padded_i = "%03d" % i
    registry, metadata = array

    # metadata example (full structure):
    #
    #     {"Metadata"=>
    #       {"AWS::CloudFormation::Init"=>
    #         {"configSets"=>{"default"=>["aaa1", "aaa2"]},
    #         "aaa1"=>{"commands"=>{"test"=>{"command"=>"echo from-aaa1 > test1.txt"}}},
    #         "aaa2"=>
    #           {"commands"=>{"test"=>{"command"=>"echo from-aaa2 > test1.txt"}}}}}}

    name, resource = registry.name, registry.resource
    configsets = configsets_map[resource] ||= {}

    validate_structure!(name, metadata)

    new_metadata = metadata["Metadata"].dup
    init = new_metadata["AWS::CloudFormation::Init"] # important: adjust data by reference

    if init.key?("configSets")
      validate_simple!(registry, new_metadata["AWS::CloudFormation::Init"]["configSets"]) # validate original configset for only simple elements

      # 1. expand each config as its own config, flattening to top-level
      cs = init.delete("configSets") # Only support configSets with simple Array of Strings
      new_config_set = {}
      new_config_set[name] = cs["default"].map {|c| "#{padded_i}_#{c}" }
      init.transform_keys! { |c| "#{padded_i}_#{c}" }

      # Rebuild default configSet, append the new complex ConfigSet structure with each iteration
      configsets["default"] ||= []
      configsets["default"] << {"ConfigSet" => name}
      configsets.merge!(new_config_set) # add each config from #1 to the top-level

      init["configSets"] = configsets # replace new configset
    else # simple config
      init["configSets"] = configsets # adjust data by reference
      configsets["default"] ||= []
      configsets["default"] << {"ConfigSet" => name}

      # build new config
      config_key = "#{padded_i}_single_generated"
      configsets[name] = [config_key]
      new_config = {config_key => init["config"]}
      # replace old config with new one
      init.delete("config") # delete original simple config
      init.merge!(new_config)
    end

    metadata_map[resource] ||= {"Metadata" => {}}
    metadata_map[resource]["Metadata"].deep_merge!(new_metadata)
    @map[resource] = metadata_map[resource]
  end
  @map
end