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408 lines
11 KiB
408 lines
11 KiB
var feature = require('caniuse-lite/dist/unpacker/feature').default
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var region = require('caniuse-lite/dist/unpacker/region').default
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var path = require('path')
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var fs = require('fs')
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var BrowserslistError = require('./error')
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var IS_SECTION = /^\s*\[(.+)]\s*$/
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var CONFIG_PATTERN = /^browserslist-config-/
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var SCOPED_CONFIG__PATTERN = /@[^/]+\/browserslist-config(-|$|\/)/
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var TIME_TO_UPDATE_CANIUSE = 6 * 30 * 24 * 60 * 60 * 1000
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var FORMAT =
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'Browserslist config should be a string or an array ' +
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'of strings with browser queries'
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var dataTimeChecked = false
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var filenessCache = {}
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var configCache = {}
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function checkExtend(name) {
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var use = ' Use `dangerousExtend` option to disable.'
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if (!CONFIG_PATTERN.test(name) && !SCOPED_CONFIG__PATTERN.test(name)) {
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throw new BrowserslistError(
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'Browserslist config needs `browserslist-config-` prefix. ' + use
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)
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}
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if (name.replace(/^@[^/]+\//, '').indexOf('.') !== -1) {
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throw new BrowserslistError(
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'`.` not allowed in Browserslist config name. ' + use
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)
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}
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if (name.indexOf('node_modules') !== -1) {
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throw new BrowserslistError(
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'`node_modules` not allowed in Browserslist config.' + use
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)
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}
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}
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function isFile(file) {
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if (file in filenessCache) {
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return filenessCache[file]
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}
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var result = fs.existsSync(file) && fs.statSync(file).isFile()
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if (!process.env.BROWSERSLIST_DISABLE_CACHE) {
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filenessCache[file] = result
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}
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return result
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}
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function eachParent(file, callback) {
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var dir = isFile(file) ? path.dirname(file) : file
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var loc = path.resolve(dir)
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do {
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var result = callback(loc)
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if (typeof result !== 'undefined') return result
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} while (loc !== (loc = path.dirname(loc)))
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return undefined
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}
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function check(section) {
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if (Array.isArray(section)) {
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for (var i = 0; i < section.length; i++) {
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if (typeof section[i] !== 'string') {
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throw new BrowserslistError(FORMAT)
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}
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}
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} else if (typeof section !== 'string') {
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throw new BrowserslistError(FORMAT)
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}
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}
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function pickEnv(config, opts) {
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if (typeof config !== 'object') return config
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var name
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if (typeof opts.env === 'string') {
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name = opts.env
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} else if (process.env.BROWSERSLIST_ENV) {
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name = process.env.BROWSERSLIST_ENV
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} else if (process.env.NODE_ENV) {
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name = process.env.NODE_ENV
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} else {
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name = 'production'
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}
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if (opts.throwOnMissing) {
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if (name && name !== 'defaults' && !config[name]) {
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throw new BrowserslistError(
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'Missing config for Browserslist environment `' + name + '`'
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)
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}
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}
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return config[name] || config.defaults
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}
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function parsePackage(file) {
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var config = JSON.parse(
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fs
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.readFileSync(file)
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.toString()
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.replace(/^\uFEFF/m, '')
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)
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if (config.browserlist && !config.browserslist) {
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throw new BrowserslistError(
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'`browserlist` key instead of `browserslist` in ' + file
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)
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}
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var list = config.browserslist
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if (Array.isArray(list) || typeof list === 'string') {
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list = { defaults: list }
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}
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for (var i in list) {
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check(list[i])
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}
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return list
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}
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function latestReleaseTime(agents) {
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var latest = 0
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for (var name in agents) {
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var dates = agents[name].releaseDate || {}
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for (var key in dates) {
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if (latest < dates[key]) {
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latest = dates[key]
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}
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}
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}
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return latest * 1000
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}
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function normalizeStats(data, stats) {
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if (!data) {
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data = {}
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}
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if (stats && 'dataByBrowser' in stats) {
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stats = stats.dataByBrowser
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}
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if (typeof stats !== 'object') return undefined
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var normalized = {}
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for (var i in stats) {
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var versions = Object.keys(stats[i])
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if (versions.length === 1 && data[i] && data[i].versions.length === 1) {
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var normal = data[i].versions[0]
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normalized[i] = {}
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normalized[i][normal] = stats[i][versions[0]]
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} else {
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normalized[i] = stats[i]
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}
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}
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return normalized
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}
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function normalizeUsageData(usageData, data) {
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for (var browser in usageData) {
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var browserUsage = usageData[browser]
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// eslint-disable-next-line max-len
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// https://github.com/browserslist/browserslist/issues/431#issuecomment-565230615
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// caniuse-db returns { 0: "percentage" } for `and_*` regional stats
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if ('0' in browserUsage) {
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var versions = data[browser].versions
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browserUsage[versions[versions.length - 1]] = browserUsage[0]
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delete browserUsage[0]
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}
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}
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}
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module.exports = {
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loadQueries: function loadQueries(ctx, name) {
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if (!ctx.dangerousExtend && !process.env.BROWSERSLIST_DANGEROUS_EXTEND) {
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checkExtend(name)
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}
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var queries = require(require.resolve(name, { paths: ['.', ctx.path] }))
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if (queries) {
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if (Array.isArray(queries)) {
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return queries
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} else if (typeof queries === 'object') {
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if (!queries.defaults) queries.defaults = []
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return pickEnv(queries, ctx, name)
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}
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}
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throw new BrowserslistError(
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'`' +
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name +
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'` config exports not an array of queries' +
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' or an object of envs'
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)
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},
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loadStat: function loadStat(ctx, name, data) {
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if (!ctx.dangerousExtend && !process.env.BROWSERSLIST_DANGEROUS_EXTEND) {
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checkExtend(name)
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}
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var stats = require(require.resolve(
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path.join(name, 'browserslist-stats.json'),
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{ paths: ['.'] }
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))
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return normalizeStats(data, stats)
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},
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getStat: function getStat(opts, data) {
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var stats
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if (opts.stats) {
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stats = opts.stats
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} else if (process.env.BROWSERSLIST_STATS) {
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stats = process.env.BROWSERSLIST_STATS
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} else if (opts.path && path.resolve && fs.existsSync) {
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stats = eachParent(opts.path, function (dir) {
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var file = path.join(dir, 'browserslist-stats.json')
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return isFile(file) ? file : undefined
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})
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}
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if (typeof stats === 'string') {
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try {
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stats = JSON.parse(fs.readFileSync(stats))
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} catch (e) {
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throw new BrowserslistError("Can't read " + stats)
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}
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}
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return normalizeStats(data, stats)
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},
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loadConfig: function loadConfig(opts) {
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if (process.env.BROWSERSLIST) {
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return process.env.BROWSERSLIST
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} else if (opts.config || process.env.BROWSERSLIST_CONFIG) {
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var file = opts.config || process.env.BROWSERSLIST_CONFIG
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if (path.basename(file) === 'package.json') {
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return pickEnv(parsePackage(file), opts)
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} else {
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return pickEnv(module.exports.readConfig(file), opts)
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}
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} else if (opts.path) {
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return pickEnv(module.exports.findConfig(opts.path), opts)
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} else {
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return undefined
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}
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},
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loadCountry: function loadCountry(usage, country, data) {
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var code = country.replace(/[^\w-]/g, '')
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if (!usage[code]) {
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var compressed
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try {
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compressed = require('caniuse-lite/data/regions/' + code + '.js')
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} catch (e) {
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throw new BrowserslistError("Unknown region name `" + code + "`.")
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}
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var usageData = region(compressed)
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normalizeUsageData(usageData, data)
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usage[country] = {}
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for (var i in usageData) {
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for (var j in usageData[i]) {
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usage[country][i + ' ' + j] = usageData[i][j]
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}
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}
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}
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},
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loadFeature: function loadFeature(features, name) {
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name = name.replace(/[^\w-]/g, '')
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if (features[name]) return
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var compressed
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try {
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compressed = require('caniuse-lite/data/features/' + name + '.js')
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} catch (e) {
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throw new BrowserslistError("Unknown feature name `" + name + "`.")
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}
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var stats = feature(compressed).stats
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features[name] = {}
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for (var i in stats) {
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for (var j in stats[i]) {
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features[name][i + ' ' + j] = stats[i][j]
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}
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}
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},
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parseConfig: function parseConfig(string) {
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var result = { defaults: [] }
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var sections = ['defaults']
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string
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.toString()
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.replace(/#[^\n]*/g, '')
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.split(/\n|,/)
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.map(function (line) {
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return line.trim()
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})
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.filter(function (line) {
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return line !== ''
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})
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.forEach(function (line) {
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if (IS_SECTION.test(line)) {
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sections = line.match(IS_SECTION)[1].trim().split(' ')
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sections.forEach(function (section) {
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if (result[section]) {
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throw new BrowserslistError(
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'Duplicate section ' + section + ' in Browserslist config'
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)
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}
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result[section] = []
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})
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} else {
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sections.forEach(function (section) {
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result[section].push(line)
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})
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}
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})
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return result
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},
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readConfig: function readConfig(file) {
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if (!isFile(file)) {
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throw new BrowserslistError("Can't read " + file + ' config')
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}
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return module.exports.parseConfig(fs.readFileSync(file))
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},
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findConfig: function findConfig(from) {
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from = path.resolve(from)
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var passed = []
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var resolved = eachParent(from, function (dir) {
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if (dir in configCache) {
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return configCache[dir]
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}
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passed.push(dir)
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var config = path.join(dir, 'browserslist')
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var pkg = path.join(dir, 'package.json')
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var rc = path.join(dir, '.browserslistrc')
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var pkgBrowserslist
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if (isFile(pkg)) {
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try {
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pkgBrowserslist = parsePackage(pkg)
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} catch (e) {
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if (e.name === 'BrowserslistError') throw e
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console.warn(
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'[Browserslist] Could not parse ' + pkg + '. Ignoring it.'
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)
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}
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}
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if (isFile(config) && pkgBrowserslist) {
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throw new BrowserslistError(
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dir + ' contains both browserslist and package.json with browsers'
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)
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} else if (isFile(rc) && pkgBrowserslist) {
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throw new BrowserslistError(
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dir + ' contains both .browserslistrc and package.json with browsers'
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)
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} else if (isFile(config) && isFile(rc)) {
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throw new BrowserslistError(
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dir + ' contains both .browserslistrc and browserslist'
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)
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} else if (isFile(config)) {
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return module.exports.readConfig(config)
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} else if (isFile(rc)) {
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return module.exports.readConfig(rc)
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} else {
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return pkgBrowserslist
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}
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})
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if (!process.env.BROWSERSLIST_DISABLE_CACHE) {
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passed.forEach(function (dir) {
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configCache[dir] = resolved
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})
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}
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return resolved
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},
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clearCaches: function clearCaches() {
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dataTimeChecked = false
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filenessCache = {}
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configCache = {}
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this.cache = {}
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},
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oldDataWarning: function oldDataWarning(agentsObj) {
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if (dataTimeChecked) return
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dataTimeChecked = true
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if (process.env.BROWSERSLIST_IGNORE_OLD_DATA) return
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var latest = latestReleaseTime(agentsObj)
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var halfYearAgo = Date.now() - TIME_TO_UPDATE_CANIUSE
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if (latest !== 0 && latest < halfYearAgo) {
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console.warn(
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'Browserslist: caniuse-lite is outdated. Please run:\n' +
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' npx update-browserslist-db@latest\n' +
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' Why you should do it regularly: ' +
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'https://github.com/browserslist/update-db#readme'
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)
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}
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},
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currentNode: function currentNode() {
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return 'node ' + process.versions.node
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}
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}
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