Diff two CloudFormation YAML templates

cfn-template-diff.js

// dependencies
// npm i yaml-cfn
// npm i jest-diff

// usage: node cfn-template-diff.js a.yaml b.yaml

const {yamlParse} = require('yaml-cfn');
const {readFileSync} = require('node:fs');
const {diff} = require('jest-diff');

const fileA = process.argv[2];
const fileB = process.argv[3];

const a = yamlParse(readFileSync(fileA));
const b = yamlParse(readFileSync(fileB));

console.log(diff(a, b));