Module: KnifeCloudformation::Knife::Template::InstanceMethods

Defined in:
lib/knife-cloudformation/knife/template.rb

Instance Method Summary collapse

Instance Method Details

#load_template_file(*args) ⇒ Hash

Load the template file

Parameters:

  • args (Symbol) —

    options (:allow_missing)

Returns:

  • (Hash) —

    loaded template



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# File 'lib/knife-cloudformation/knife/template.rb', line 18

def load_template_file(*args)
  unless(Chef::Config[:knife][:cloudformation][:template])
    set_paths_and_discover_file!
    unless(File.exists?(Chef::Config[:knife][:cloudformation][:file].to_s))
      unless(args.include?(:allow_missing))
        ui.fatal "Invalid formation file path provided: #{Chef::Config[:knife][:cloudformation][:file]}"
        exit 1
      end
    end
  end
  if(Chef::Config[:knife][:cloudformation][:template])
    Chef::Config[:knife][:cloudformation][:template]
  elsif(Chef::Config[:knife][:cloudformation][:file])
    if(Chef::Config[:knife][:cloudformation][:processing])
      sf = SparkleFormation.compile(Chef::Config[:knife][:cloudformation][:file], :sparkle)
      if(sf.nested? && !sf.isolated_nests?)
        raise TypeError.new('Template does not contain isolated stack nesting! Cannot process in existing state.')
      end
      if(sf.nested? && Chef::Config[:knife][:cloudformation][:apply_nesting])
        sf.apply_nesting do |stack_name, stack_definition|
          bucket = provider.connection.api_for(:storage).buckets.get(
            Chef::Config[:knife][:cloudformation][:nesting_bucket]
          )
          if(config[:print_only])
            "http://example.com/bucket/#{name_args.first}_#{stack_name}.json"
          else
            unless(bucket)
              raise "Failed to locate configured bucket for stack template storage (#{bucket})!"
            end
            file = bucket.files.build
            file.name = "#{name_args.first}_#{stack_name}.json"
            file.content_type = 'text/json'
            file.body = MultiJson.dump(KnifeCloudformation::Utils::StackParameterScrubber.scrub!(stack_definition))
            file.save
            # TODO: what if we need extra params?
            url = URI.parse(file.url)
            "#{url.scheme}://#{url.host}#{url.path}"
          end
        end
      else
        sf.dump.merge('sfn_nested_stack' => !!sf.nested?)
      end
    else
      _from_json(File.read(Chef::Config[:knife][:cloudformation][:file]))
    end
  end
end

#set_paths_and_discover_file! ⇒ TrueClass

Set SparkleFormation paths and locate tempate

Returns:

  • (TrueClass) 


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# File 'lib/knife-cloudformation/knife/template.rb', line 94

def set_paths_and_discover_file!
  if(Chef::Config[:knife][:cloudformation][:base_directory])
    SparkleFormation.components_path = File.join(
      Chef::Config[:knife][:cloudformation][:base_directory], 'components'
    )
    SparkleFormation.dynamics_path = File.join(
      Chef::Config[:knife][:cloudformation][:base_directory], 'dynamics'
    )
  end
  if(!Chef::Config[:knife][:cloudformation][:file] && Chef::Config[:knife][:cloudformation][:file_path_prompt])
    root = File.expand_path(
      Chef::Config[:knife][:cloudformation].fetch(:base_directory,
        File.join(Dir.pwd, 'cloudformation')
      )
    ).split('/')
    bucket = root.pop
    root = root.join('/')
    directory = File.join(root, bucket)
    Chef::Config[:knife][:cloudformation][:file] = prompt_for_file(directory,
      :directories_name => 'Collections',
      :files_name => 'Templates',
      :ignore_directories => TEMPLATE_IGNORE_DIRECTORIES
    )
  else
    unless(Pathname(Chef::Config[:knife][:cloudformation][:file].to_s).absolute?)
      base_dir = Chef::Config[:knife][:cloudformation][:base_directory].to_s
      file = Chef::Config[:knife][:cloudformation][:file].to_s
      pwd = Dir.pwd
      Chef::Config[:knife][:cloudformation][:file] = [
        File.join(base_dir, file),
        File.join(pwd, file),
        File.join(pwd, 'cloudformation', file)
      ].detect do |file_path|
        File.file?(file_path)
      end
    end
  end
  true
end

#translate_template(template) ⇒ Hash

Apply template translation

Parameters:

  • template (Hash)

Returns:

  • (Hash) 


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# File 'lib/knife-cloudformation/knife/template.rb', line 70

def translate_template(template)
  if(klass_name = Chef::Config[:knife][:cloudformation][:translate])
    klass = SparkleFormation::Translation.const_get(camel(klass_name))
    args = {
      :parameters => Chef::Config[:knife][:cloudformation][:options][:parameters]
    }
    if(chunk_size = Chef::Config[:knife][:cloudformation][:translate_chunk_size])
      args.merge!(
        :options => {
          :serialization_chunk_size => chunk_size
        }
      )
    end
    translator = klass.new(template, args)
    translator.translate!
    template = translator.translated
    ui.info "#{ui.color('Translation applied:', :bold)} #{ui.color(klass_name, :yellow)}"
  end
  template
end