buzztaiki/00_digdag_variable_scope.md

## 00_digdag_variable_scope.md

      
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              00_digdag_variable_scope.md
            
          
export は子供にだけ公開される。
subtask で store しても親に反映される。


## task.rb
# frozen_string_literal: true

class StoreTask
  def call(name:)
    Digdag.env.store(name.to_sym => name)
  end
end

class ExportAndChildTask
  def call(name:)
    Digdag.env.export(name.to_sym => name)
    Digdag.env.add_subtask(EchoTask, :call, var: name)
  end
end

class StoreAndChildTask
  def call(name:)
    Digdag.env.store(name.to_sym => name)
    Digdag.env.add_subtask(EchoTask, :call, var: name)
  end
end

class EchoTask
  def call(var:)
    puts var
  end
end

## variable_scope.dig
timezone: UTC

_export:
  rb:
    require: 'tasks'

+step1:
  _export:
    export_step1: export_step1

  +step1_1:
    echo>: ${export_step1}

+step2:
  rb>: ExportAndChildTask.call
  name: export_step2

+step3:
  rb>: StoreAndChildTask.call
  name: store_step3

+step4:
  +step4_1:
    rb>: StoreTask.call
    name: store_step4_1
  +step4_2:
    echo>: ${store_step4_1}

# ERROR!
# +echo1:
#   echo>: ${export_step1}

# ERROR!
# +echo2:
#   echo>: ${export_step2}

+echo3:
  echo>: ${store_step3}

+echo4:
  echo>: ${store_step4_1}
	# frozen_string_literal: true

	class StoreTask
	def call(name:)
	Digdag.env.store(name.to_sym => name)
	end
	end

	class ExportAndChildTask
	def call(name:)
	Digdag.env.export(name.to_sym => name)
	Digdag.env.add_subtask(EchoTask, :call, var: name)
	end
	end

	class StoreAndChildTask
	def call(name:)
	Digdag.env.store(name.to_sym => name)
	Digdag.env.add_subtask(EchoTask, :call, var: name)
	end
	end

	class EchoTask
	def call(var:)
	puts var
	end
	end
	timezone: UTC

	_export:
	rb:
	require: 'tasks'

	+step1:
	_export:
	export_step1: export_step1

	+step1_1:
	echo>: ${export_step1}

	+step2:
	rb>: ExportAndChildTask.call
	name: export_step2

	+step3:
	rb>: StoreAndChildTask.call
	name: store_step3

	+step4:
	+step4_1:
	rb>: StoreTask.call
	name: store_step4_1
	+step4_2:
	echo>: ${store_step4_1}

	# ERROR!
	# +echo1:
	# echo>: ${export_step1}

	# ERROR!
	# +echo2:
	# echo>: ${export_step2}

	+echo3:
	echo>: ${store_step3}

	+echo4:
	echo>: ${store_step4_1}