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cfn-deps

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AWS CloudFormation のテンプレートファイル間の依存関係を DOT 言語 の依存グラフとして出力する。

テンプレートファイル間の依存関係には CloudFormation の Outputs および ImportValue 関数を考慮する。 ただし、複雑な Outputs/ImportValue 名を使用している場合は検知できない。 (JSON.stringify が一致する Outputs/ImportValue に依存関係があるとしている)

# Work
---
Outputs:
  Test1:
    Value: !Ref Res1
    Export:
      Name: !Sub ${Environment}-test-1
---
Resources:
  Test2:
    Paramenters:
      XXXId: !ImportValue
        "Fn::Sub": "${Environment}-test-1"
# Not Work
---
Outputs:
  Test2:
    Value: !Ref Res1
    Export:
      Name: !Join [ "-", [ !Ref Environment, "test", 1 ] ]
---
Resources:
  Test2:
    Paramenters:
      XXXId: !ImportValue
        "Fn::Sub": "${Environment}-test-1"

また、手動で依存関係を明示したい場合はコメント部分などに DependsOn: <relative_path_to_file> を記述することで依存を追加できる

# Work
---
Parameters:
  VpcId:  # DependsOn: other.yml
    Type: String
---
# other.yml
Resources:

Install

$ npm install -g cfn-deps

Usage

$ cfn-deps './**/*.yml' > deps.dot

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