AsyncDiff is a library that compares two AsyncAPI files and provides information about the differences by pointing out explicitly information like breaking changes.

• Installation
• Usage
• Standard object
  • Overriding the standard
• Example
• API
• Develop
• Contributing

Features

• Get explicit information about the changes you make to your AsyncAPI files, such as breaking, non-breaking and unclassified changes.
• Different types of output such as JSON, YAML and Markdown.

Installation

npm install @asyncapi/diff

Usage

NOTE: The library doesn't have a built-in parser to parse the given AsyncAPI document. Thus, you have to make sure they provide the valid & dereferenced AsyncAPI document as an input. You can use the AsyncAPI parser to parse and validate the AsyncAPI file first. You can use other tools, but you must make sure that the document is valid and dereferenced.

import { diff } from "@asyncapi/diff"; // const { diff } = require('@asyncapi/diff');

const output = diff(firstDocument, secondDocument, {
  overrides: {
    // object to override the standard
  },
});

Standard object

This library has a pre-configured standard which marks a change as breaking, non-breaking or unclassified. This standard data is stored as an object inside the standard.ts file.

The format of this standard object is explained in this document.

Overriding the standard

To understand the format of overriding object, take a look at this document.

The overrides object must be passed in the following format:

{
	[jsonPointer]: {
		add: 'breaking' | 'non-breaking' | 'unclassified'
		remove: 'breaking' | 'non-breaking' | 'unclassified'
		edit: 'breaking' | 'non-breaking' | 'unclassified'
	}
}

Example

See the index document to get all the helper methods this library offers.

1. Without any overrides

const output = diff(firstDocument, secondDocument);

output.getOutput(); // the whole output data
output.breaking(); // the breaking changes
output.nonBreaking(); // the non-breaking changes
output.unclassified(); // the unclassified changes

2. With overrides

const output = diff(firstDocument, secondDocument, {
  overrides: {
    "/servers/*/protocol": {
      add: "non-breaking",
      remove: "breaking",
      edit: "unclassified",
    },
  },
});

Output

This library supports outputs:

• JSON: json
• YAML: yaml or yml
• Markdown: markdown or md

const jsonOutput = diff(firstDocument, secondDocument, {
  outputType: "json",
});

const yamlOutput = diff(firstDocument, secondDocument, {
  outputType: "yaml" | "yml",
});

const markdownOutput = diff(firstDocument, secondDocument, {
  outputType: "markdown" | "md",
});

With markdown output, you can also choose subtypes of the changes as JSON(json) or YAML(yaml or yml).

const markdownOutput = diff(firstDocument, secondDocument, {
  outputType: "markdown" | "md",
  markdownSubtype: "json" | "yaml" | "yml",
});

API

Checkout the index document to see all the APIs this library offers.

Develop

1. Write code and tests
2. Make sure all tests pass npm run test
3. Make sure code is well formatted and secure npm run lint

Contributing

Help us make this library more robust. Read CONTRIBUTING guide & start contributing.

Contributors

Thanks goes to these wonderful people (emoji key):

This project follows the all-contributors specification. Contributions of any kind welcome!