update-notifier

What is update-notifier?

The update-notifier npm package is used to inform users when a newer version of a particular npm package is available. It is particularly useful for CLI tools to notify users to update to the latest version.

What are update-notifier's main functionalities?

Basic Usage

This feature allows you to set up a basic notifier that checks for updates to the package specified in the package.json file. If an update is available, it will notify the user.

const updateNotifier = require('update-notifier');
const pkg = require('./package.json');

const notifier = updateNotifier({ pkg });

if (notifier.update) {
  notifier.notify();
}

Custom Message

This feature allows you to customize the message that is displayed to the user when an update is available.

const updateNotifier = require('update-notifier');
const pkg = require('./package.json');

const notifier = updateNotifier({ pkg });

if (notifier.update) {
  notifier.notify({
    message: 'Update available: ' + notifier.update.latest + '. Run `npm install -g ' + pkg.name + '` to update.'
  });
}

Check Interval

This feature allows you to set the interval at which the update check is performed. In this example, the check is performed once every 24 hours.

const updateNotifier = require('update-notifier');
const pkg = require('./package.json');

const notifier = updateNotifier({ pkg, updateCheckInterval: 1000 * 60 * 60 * 24 }); // 1 day

if (notifier.update) {
  notifier.notify();
}

Other packages similar to update-notifier

npm-check

npm-check is a tool that checks for outdated, incorrect, and unused dependencies. It provides a more comprehensive check compared to update-notifier, as it can also identify unused packages and incorrect versions.

npm-outdated

npm-outdated is a built-in npm command that checks for outdated packages. It provides a list of all outdated packages in a project, making it more suitable for project-wide updates rather than individual package notifications.

README

update-notifier

Update notifier for your Node.js NPM package

Inform your package users of updates in a non-intrusive way. Mainly targets global CLI apps.

Whenever you initiate the update notifier and it's not within the interval threshold, it will asynchronously check with NPM in the background for available updates, then persist the result. The next time the notifier is initiated the result will be loaded into the .update property. This prevents any impact on your package startup performance. The check process is done with fork. This means that if you call process.exit, the check will still be performed in its own process.

About

The idea for this module came from the desire to apply the browser update strategy to CLI tools, where everyone is always on the latest version. We first tried automatic updating, which we discovered wasn't popular. This is the second iteration of that idea, but limited to just update notifications.

There are a few projects using it:

• Yeoman - modern workflows for modern webapps

• Automaton - task automation tool

• Spoon.js CLI

Example usage

var updateNotifier = require('update-notifier');

// Checks for available update and returns an instance
var notifier = updateNotifier();

if (notifier.update) {
	// Notify using the built-in convenience method
	notifier.notify();
}

// `notifier.update` contains some useful info about the update
console.log(notifier.update);
/*
{
	latest: '0.9.5',
	current: '0.9.3',
	type: 'patch', // possible values: latest, major, minor, patch
	date: '2012-11-05T14:32:37.603Z',
	name: 'yeoman'
}
*/

Example with settings and custom message

var notifier = updateNotifier({
	updateCheckInterval: 1000 * 60 * 60 * 24 * 7 // 1 week
});

if (notifier.update) {
	notifier.notify('Update available: ' + notifier.update.latest);
}

Documentation

updateNotifier([settings])

Checks if there is an available update. Accepts settings defined below. Returns an object with update info if there is an available update, otherwise undefined.

updateNotifier.notify([message || defer])

A convenience method that will inform the user about an available update (see screenshot). By default it will display the message right away. However, if you supply a custom message or true it will be displayed right before the process exits.

Settings

packagePath

Type: string
Default: 'package.json'

Relative path to your module package.json.

packageName

Type: string
Default: Inferred from packageFile

Used instead of inferring it from packageFile.
Requires you to also specify packageVersion.

packageVersion

Type: string
Default: Inferred from packageFile

Used instead of inferring it from packageFile.
Requires you to also specify packageName.

updateCheckInterval

Type: number
Default: 1000 * 60 * 60 * 24 (1 day)

How often it should check for updates.

updateCheckTimeout

Type: number
Default: 20000 (20 secs)

How long the update can take.
If it takes longer than the timeout, it will be aborted.

registryVersion

Type: string
Default: 'http://registry.npmjs.org/%s'

Alternative registry mirrors:

• http://85.10.209.91/%s
• http://165.225.128.50:8000/%s

User settings

Users of your module have the ability to opt-out of the update notifier by changing the optOut property to true in ~/.config/configstore/update-notifier-[your-module-name].yml. The path is available in notifier.config.path.

You could also let the user opt-out on a per run basis:

if (process.argv.indexOf('--no-update-notifier') === -1) {
	// run updateNotifier()
}

License

BSD license and copyright Google