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}`);
});
Other packages similar to @aws-cdk/cloudformation-diff
cfn-diff
cfn-diff is a package that provides similar functionality for comparing AWS CloudFormation templates. It offers tools to detect changes and differences between templates, similar to @aws-cdk/cloudformation-diff. However, it may not be as tightly integrated with the AWS CDK ecosystem.
Utilities to diff AWS CDK stacks against CloudFormation templates
This is a developer preview (public beta) module.
All classes with the Cfn
prefix in this module (CFN Resources)
are auto-generated from CloudFormation. They are stable and safe to use.
However, all other classes, i.e., higher level constructs, are under active development and subject to non-backward
compatible changes or removal in any future version. These are not subject to the Semantic Versioning model.
This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
This module is part of the AWS Cloud Development Kit project.