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@aws-cdk/cloudformation-diff

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@aws-cdk/cloudformation-diff

Utilities to diff CDK stacks against CloudFormation templates

  • 2.106.0
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  • npm
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4
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What is @aws-cdk/cloudformation-diff?

@aws-cdk/cloudformation-diff is a package that provides tools to compare AWS CloudFormation templates. It helps in identifying the differences between two CloudFormation templates, which is useful for understanding changes before applying them.

What are @aws-cdk/cloudformation-diff's main functionalities?

Template Diffing

This feature allows you to compare two CloudFormation templates and identify the differences. The `diffTemplate` function takes two templates as input and returns the differences.

const { diffTemplate } = require('@aws-cdk/cloudformation-diff');
const templateA = require('./templateA.json');
const templateB = require('./templateB.json');
const differences = diffTemplate(templateA, templateB);
console.log(differences);

Change Detection

This feature helps in detecting specific changes between two templates. By iterating over the differences, you can log or handle each change individually.

const { diffTemplate } = require('@aws-cdk/cloudformation-diff');
const templateA = require('./templateA.json');
const templateB = require('./templateB.json');
const differences = diffTemplate(templateA, templateB);
differences.forEach(diff => {
  console.log(`Change detected: ${diff}`);
});

Resource Comparison

This feature focuses on comparing resources within the templates. It allows you to identify changes specific to resources, which is useful for understanding the impact on infrastructure.

const { diffTemplate } = require('@aws-cdk/cloudformation-diff');
const templateA = require('./templateA.json');
const templateB = require('./templateB.json');
const differences = diffTemplate(templateA, templateB);
differences.resources.forEach(resourceDiff => {
  console.log(`Resource change detected: ${resourceDiff}`);
});

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Package last updated on 10 Nov 2023

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