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// print a banner telling the user to upgrade npm to latest
// but not in CI, and not if we're doing that already.
// Check daily for betas, and weekly otherwise.
const pacote = require('pacote')
const ciDetect = require('@npmcli/ci-detect')
const semver = require('semver')
const chalk = require('chalk')
const { promisify } = require('util')
const stat = promisify(require('fs').stat)
const writeFile = promisify(require('fs').writeFile)
const { resolve } = require('path')
const isGlobalNpmUpdate = npm => {
return npm.flatOptions.global &&
['install', 'update'].includes(npm.command) &&
npm.argv.some(arg => /^npm(@|$)/.test(arg))
}
// update check frequency
const DAILY = 1000 * 60 * 60 * 24
const WEEKLY = DAILY * 7
// don't put it in the _cacache folder, just in npm's cache
const lastCheckedFile = npm =>
resolve(npm.flatOptions.cache, '../_update-notifier-last-checked')
const checkTimeout = async (npm, duration) => {
const t = new Date(Date.now() - duration)
const f = lastCheckedFile(npm)
// if we don't have a file, then definitely check it.
const st = await stat(f).catch(() => ({ mtime: t - 1 }))
return t > st.mtime
}
const updateNotifier = async (npm, spec = 'latest') => {
// never check for updates in CI, when updating npm already, or opted out
if (!npm.config.get('update-notifier') ||
isGlobalNpmUpdate(npm) ||
ciDetect())
return null
// if we're on a prerelease train, then updates are coming fast
// check for a new one daily. otherwise, weekly.
const { version } = npm
const current = semver.parse(version)
// if we're on a beta train, always get the next beta
if (current.prerelease.length)
spec = `^${version}`
// while on a beta train, get updates daily
const duration = spec !== 'latest' ? DAILY : WEEKLY
// if we've already checked within the specified duration, don't check again
if (!(await checkTimeout(npm, duration)))
return null
// if they're currently using a prerelease, nudge to the next prerelease
// otherwise, nudge to latest.
const useColor = npm.log.useColor()
const mani = await pacote.manifest(`npm@${spec}`, {
// always prefer latest, even if doing --tag=whatever on the cmd
defaultTag: 'latest',
...npm.flatOptions,
}).catch(() => null)
// if pacote failed, give up
if (!mani)
return null
const latest = mani.version
// if the current version is *greater* than latest, we're on a 'next'
// and should get the updates from that release train.
// Note that this isn't another http request over the network, because
// the packument will be cached by pacote from previous request.
if (semver.gt(version, latest) && spec === 'latest')
return updateNotifier(npm, `^${version}`)
// if we already have something >= the desired spec, then we're done
if (semver.gte(version, latest))
return null
// ok! notify the user about this update they should get.
// The message is saved for printing at process exit so it will not get
// lost in any other messages being printed as part of the command.
const update = semver.parse(mani.version)
const type = update.major !== current.major ? 'major'
: update.minor !== current.minor ? 'minor'
: update.patch !== current.patch ? 'patch'
: 'prerelease'
const typec = !useColor ? type
: type === 'major' ? chalk.red(type)
: type === 'minor' ? chalk.yellow(type)
: chalk.green(type)
const oldc = !useColor ? current : chalk.red(current)
const latestc = !useColor ? latest : chalk.green(latest)
const changelog = `https://github.com/npm/cli/releases/tag/v${latest}`
const changelogc = !useColor ? `<${changelog}>` : chalk.cyan(changelog)
const cmd = `npm install -g npm@${latest}`
const cmdc = !useColor ? `\`${cmd}\`` : chalk.green(cmd)
const message = `\nNew ${typec} version of npm available! ` +
`${oldc} -> ${latestc}\n` +
`Changelog: ${changelogc}\n` +
`Run ${cmdc} to update!\n`
return message
}
// only update the notification timeout if we actually finished checking
module.exports = async npm => {
const notification = await updateNotifier(npm)
// intentional. do not await this. it's a best-effort update. if this
// fails, it's ok. might be using /dev/null as the cache or something weird
// like that.
writeFile(lastCheckedFile(npm), '').catch(() => {})
npm.updateNotification = notification
}