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const {spawn} = require('child_process');

const importLazy = require('import-lazy')(require);

const configstore = importLazy('configstore');

const semverDiff = importLazy('semver-diff');

const latestVersion = importLazy('latest-version');

const isInstalledGlobally = importLazy('is-installed-globally');

const isYarnGlobal = importLazy('is-yarn-global');

const xdgBasedir = importLazy('xdg-basedir');

		options.distTag = options.distTag || 'latest';

		// Reduce pkg to the essential keys. with fallback to deprecated options

		// TODO: Remove deprecated options at some point far into the future

			name: options.pkg.name || options.packageName,

			version: options.pkg.version || options.packageVersion

		if (!options.pkg.name || !options.pkg.version) {

			throw new Error('pkg.name and pkg.version required');

		this.packageVersion = options.pkg.version;

		this.updateCheckInterval = typeof options.updateCheckInterval === 'number' ? options.updateCheckInterval : ONE_DAY;

		this.disabled = 'NO_UPDATE_NOTIFIER' in process.env ||

			process.argv.includes('--no-update-notifier') ||

		this.shouldNotifyInNpmScript = options.shouldNotifyInNpmScript;

				this.config = new ConfigStore(`update-notifier-${this.packageName}`, {

					// Init with the current time so the first check is only

					// after the set interval, so not to bother users right away

				// Expecting error code EACCES or EPERM

					chalk().yellow(format(' %s update check failed ', options.pkg.name)) +

					format('\n Try running with %s or get access ', chalk().cyan('sudo')) +

					'\n to the local update config store via \n' +

					chalk().cyan(format(' sudo chown -R $USER:$(id -gn $USER) %s ', xdgBasedir().config));

					console.error(boxen()(message, {align: 'center'}));

		this.update = this.config.get('update');

			// Use the real latest version instead of the cached one

			this.update.current = this.packageVersion;

		// Only check for updates on a set interval

if (Date.now() - this.config.get('lastUpdateCheck') < this.updateCheckInterval) {

		// Spawn a detached process, passing the options as an environment property

		spawn(process.execPath, [path.join(__dirname, 'check.js'), JSON.stringify(this.options)], {

		const latest = await latestVersion()(this.packageName, {version: distTag});

		const suppressForNpm = !this.shouldNotifyInNpmScript && isNpm().isNpmOrYarn;

		if (!process.stdout.isTTY || suppressForNpm || !this.update || this.update.current === this.update.latest) {

		if (!process.stdout.isTTY || suppressForNpm || !this.update || !semver().gt(this.update.latest, this.update.current)) {

			installCommand = `yarn global add ${this.packageName}`;

			installCommand = `npm i -g ${this.packageName}`;

			installCommand = `yarn add ${this.packageName}`;

			installCommand = `npm i ${this.packageName}`;

		const defaultTemplate = 'Update available ' +

			' \nRun ' + chalk().cyan('{updateCommand}') + ' to update';

		const template = options.message || defaultTemplate;

		options.boxenOptions = options.boxenOptions || {

	const updateNotifier = new UpdateNotifier(options);

module.exports.UpdateNotifier = UpdateNotifier;

	"description": "Update notifications for your CLI app",

	"funding": "https://github.com/yeoman/update-notifier?sponsor=1",

# update-notifier [![Build Status](https://travis-ci.org/yeoman/update-notifier.svg?branch=master)](https://travis-ci.org/yeoman/update-notifier)

Inform users of your package of updates in a non-intrusive way.

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

// Checks for available update and returns an instance

// Notify using the built-in convenience method

// `notifier.update` contains some useful info about the update

	type: 'patch', // Possible values: latest, major, minor, patch, prerelease, build

	updateCheckInterval: 1000 * 60 * 60 * 24 * 7 // 1 week

	console.log(`Update available: ${notifier.update.latest}`);

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 update check is done in a unref'ed [child process](https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options). This means that if you call `process.exit`, the check will still be performed in its own process.

The first time the user runs your app, it will check for an update, and even if an update is available, it will wait the specified `updateCheckInterval` before notifying the user. This is done to not be annoying to the user, but might surprise you as an implementer if you're testing whether it works. Check out [`example.js`](example.js) to quickly test out `update-notifier` and see how you can test that it works in your app.

Checks if there is an available update. Accepts options defined below. Returns an instance with an `.update` property if there is an available update, otherwise `undefined`.

- [XO](https://github.com/xojs/xo) - JavaScript happiness style linter

- [Pageres](https://github.com/sindresorhus/pageres) - Capture website screenshots

- [Node GH](https://github.com/node-gh/gh) - GitHub command line tool

[And 2700+ more…](https://www.npmjs.org/browse/depended/update-notifier)

<a href="https://tidelift.com/subscription/pkg/npm-update_notifier?utm_source=npm-update-notifier&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>

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		@@ -9,2 +9,3 @@ 'use strict';
		const chalk = importLazy('chalk');
		const semver = importLazy('semver');
		const semverDiff = importLazy('semver-diff');
		@@ -118,3 +119,3 @@ const latestVersion = importLazy('latest-version');
		const suppressForNpm = !this.shouldNotifyInNpmScript && isNpm().isNpmOrYarn;
		if (!process.stdout.isTTY \|\| suppressForNpm \|\| !this.update \|\| this.update.current === this.update.latest) {
		if (!process.stdout.isTTY \|\| suppressForNpm \|\| !this.update \|\| !semver().gt(this.update.latest, this.update.current)) {
		return this;
		@@ -121,0 +122,0 @@ }

		{
		"name": "update-notifier",
		"version": "4.1.1",
		"version": "4.1.2",
		"description": "Update notifications for your CLI app",
		@@ -48,2 +48,3 @@ "license": "BSD-2-Clause",
		"pupa": "^2.0.1",
		"semver": "^7.3.2",
		"semver-diff": "^3.1.1",
		@@ -50,0 +51,0 @@ "xdg-basedir": "^4.0.0"

Improved metrics

Worsened metrics

Dependency changes

		@@ -209,3 +209,2 @@ # update-notifier [![Build Status](https://travis-ci.org/yeoman/update-notifier.svg?branch=master)](https://travis-ci.org/yeoman/update-notifier)
		- [XO](https://github.com/xojs/xo) - JavaScript happiness style linter
		- [Pageres](https://github.com/sindresorhus/pageres) - Capture website screenshots
		- [Node GH](https://github.com/node-gh/gh) - GitHub command line tool
		@@ -212,0 +211,0 @@