var feature = require('caniuse-lite/dist/unpacker/feature').default var region = require('caniuse-lite/dist/unpacker/region').default var path = require('path') var fs = require('fs') var BrowserslistError = require('./error') var IS_SECTION = /^\s*\[(.+)]\s*$/ var CONFIG_PATTERN = /^browserslist-config-/ var SCOPED_CONFIG__PATTERN = /@[^/]+(?:\/[^/]+)?\/browserslist-config(?:-|$|\/)/ var TIME_TO_UPDATE_CANIUSE = 6 * 30 * 24 * 60 * 60 * 1000 var FORMAT = 'Browserslist config should be a string or an array ' + 'of strings with browser queries' var dataTimeChecked = false var filenessCache = {} var configCache = {} function checkExtend(name) { var use = ' Use `dangerousExtend` option to disable.' if (!CONFIG_PATTERN.test(name) && !SCOPED_CONFIG__PATTERN.test(name)) { throw new BrowserslistError( 'Browserslist config needs `browserslist-config-` prefix. ' + use ) } if (name.replace(/^@[^/]+\//, '').indexOf('.') !== -1) { throw new BrowserslistError( '`.` not allowed in Browserslist config name. ' + use ) } if (name.indexOf('node_modules') !== -1) { throw new BrowserslistError( '`node_modules` not allowed in Browserslist config.' + use ) } } function isFile(file) { if (file in filenessCache) { return filenessCache[file] } var result = fs.existsSync(file) && fs.statSync(file).isFile() if (!process.env.BROWSERSLIST_DISABLE_CACHE) { filenessCache[file] = result } return result } function eachParent(file, callback) { var dir = isFile(file) ? path.dirname(file) : file var loc = path.resolve(dir) do { if (!pathInRoot(loc)) break var result = callback(loc) if (typeof result !== 'undefined') return result } while (loc !== (loc = path.dirname(loc))) return undefined } function pathInRoot(p) { if (!process.env.BROWSERSLIST_ROOT_PATH) return true var rootPath = path.resolve(process.env.BROWSERSLIST_ROOT_PATH) if (path.relative(rootPath, p).substring(0, 2) === '..') { return false } return true } function check(section) { if (Array.isArray(section)) { for (var i = 0; i < section.length; i++) { if (typeof section[i] !== 'string') { throw new BrowserslistError(FORMAT) } } } else if (typeof section !== 'string') { throw new BrowserslistError(FORMAT) } } function pickEnv(config, opts) { if (typeof config !== 'object') return config var name if (typeof opts.env === 'string') { name = opts.env } else if (process.env.BROWSERSLIST_ENV) { name = process.env.BROWSERSLIST_ENV } else if (process.env.NODE_ENV) { name = process.env.NODE_ENV } else { name = 'production' } if (opts.throwOnMissing) { if (name && name !== 'defaults' && !config[name]) { throw new BrowserslistError( 'Missing config for Browserslist environment `' + name + '`' ) } } return config[name] || config.defaults } function parsePackage(file) { var config = JSON.parse( fs .readFileSync(file) .toString() .replace(/^\uFEFF/m, '') ) if (config.browserlist && !config.browserslist) { throw new BrowserslistError( '`browserlist` key instead of `browserslist` in ' + file ) } var list = config.browserslist if (Array.isArray(list) || typeof list === 'string') { list = { defaults: list } } for (var i in list) { check(list[i]) } return list } function latestReleaseTime(agents) { var latest = 0 for (var name in agents) { var dates = agents[name].releaseDate || {} for (var key in dates) { if (latest < dates[key]) { latest = dates[key] } } } return latest * 1000 } function normalizeStats(data, stats) { if (!data) { data = {} } if (stats && 'dataByBrowser' in stats) { stats = stats.dataByBrowser } if (typeof stats !== 'object') return undefined var normalized = {} for (var i in stats) { var versions = Object.keys(stats[i]) if (versions.length === 1 && data[i] && data[i].versions.length === 1) { var normal = data[i].versions[0] normalized[i] = {} normalized[i][normal] = stats[i][versions[0]] } else { normalized[i] = stats[i] } } return normalized } function normalizeUsageData(usageData, data) { for (var browser in usageData) { var browserUsage = usageData[browser] // https://github.com/browserslist/browserslist/issues/431#issuecomment-565230615 // caniuse-db returns { 0: "percentage" } for `and_*` regional stats if ('0' in browserUsage) { var versions = data[browser].versions browserUsage[versions[versions.length - 1]] = browserUsage[0] delete browserUsage[0] } } } module.exports = { loadQueries: function loadQueries(ctx, name) { if (!ctx.dangerousExtend && !process.env.BROWSERSLIST_DANGEROUS_EXTEND) { checkExtend(name) } var queries = require(require.resolve(name, { paths: ['.', ctx.path] })) if (queries) { if (Array.isArray(queries)) { return queries } else if (typeof queries === 'object') { if (!queries.defaults) queries.defaults = [] return pickEnv(queries, ctx, name) } } throw new BrowserslistError( '`' + name + '` config exports not an array of queries' + ' or an object of envs' ) }, loadStat: function loadStat(ctx, name, data) { if (!ctx.dangerousExtend && !process.env.BROWSERSLIST_DANGEROUS_EXTEND) { checkExtend(name) } var stats = require(require.resolve( path.join(name, 'browserslist-stats.json'), { paths: ['.'] } )) return normalizeStats(data, stats) }, getStat: function getStat(opts, data) { var stats if (opts.stats) { stats = opts.stats } else if (process.env.BROWSERSLIST_STATS) { stats = process.env.BROWSERSLIST_STATS } else if (opts.path && path.resolve && fs.existsSync) { stats = eachParent(opts.path, function (dir) { var file = path.join(dir, 'browserslist-stats.json') return isFile(file) ? file : undefined }) } if (typeof stats === 'string') { try { stats = JSON.parse(fs.readFileSync(stats)) } catch (e) { throw new BrowserslistError("Can't read " + stats) } } return normalizeStats(data, stats) }, loadConfig: function loadConfig(opts) { if (process.env.BROWSERSLIST) { return process.env.BROWSERSLIST } else if (opts.config || process.env.BROWSERSLIST_CONFIG) { var file = opts.config || process.env.BROWSERSLIST_CONFIG if (path.basename(file) === 'package.json') { return pickEnv(parsePackage(file), opts) } else { return pickEnv(module.exports.readConfig(file), opts) } } else if (opts.path) { return pickEnv(module.exports.findConfig(opts.path), opts) } else { return undefined } }, loadCountry: function loadCountry(usage, country, data) { var code = country.replace(/[^\w-]/g, '') if (!usage[code]) { var compressed try { compressed = require('caniuse-lite/data/regions/' + code + '.js') } catch (e) { throw new BrowserslistError('Unknown region name `' + code + '`.') } var usageData = region(compressed) normalizeUsageData(usageData, data) usage[country] = {} for (var i in usageData) { for (var j in usageData[i]) { usage[country][i + ' ' + j] = usageData[i][j] } } } }, loadFeature: function loadFeature(features, name) { name = name.replace(/[^\w-]/g, '') if (features[name]) return var compressed try { compressed = require('caniuse-lite/data/features/' + name + '.js') } catch (e) { throw new BrowserslistError('Unknown feature name `' + name + '`.') } var stats = feature(compressed).stats features[name] = {} for (var i in stats) { features[name][i] = {} for (var j in stats[i]) { features[name][i][j] = stats[i][j] } } }, parseConfig: function parseConfig(string) { var result = { defaults: [] } var sections = ['defaults'] string .toString() .replace(/#[^\n]*/g, '') .split(/\n|,/) .map(function (line) { return line.trim() }) .filter(function (line) { return line !== '' }) .forEach(function (line) { if (IS_SECTION.test(line)) { sections = line.match(IS_SECTION)[1].trim().split(' ') sections.forEach(function (section) { if (result[section]) { throw new BrowserslistError( 'Duplicate section ' + section + ' in Browserslist config' ) } result[section] = [] }) } else { sections.forEach(function (section) { result[section].push(line) }) } }) return result }, readConfig: function readConfig(file) { if (!isFile(file)) { throw new BrowserslistError("Can't read " + file + ' config') } return module.exports.parseConfig(fs.readFileSync(file)) }, findConfig: function findConfig(from) { from = path.resolve(from) var passed = [] var resolved = eachParent(from, function (dir) { if (dir in configCache) { return configCache[dir] } passed.push(dir) var config = path.join(dir, 'browserslist') var pkg = path.join(dir, 'package.json') var rc = path.join(dir, '.browserslistrc') var pkgBrowserslist if (isFile(pkg)) { try { pkgBrowserslist = parsePackage(pkg) } catch (e) { if (e.name === 'BrowserslistError') throw e console.warn( '[Browserslist] Could not parse ' + pkg + '. Ignoring it.' ) } } if (isFile(config) && pkgBrowserslist) { throw new BrowserslistError( dir + ' contains both browserslist and package.json with browsers' ) } else if (isFile(rc) && pkgBrowserslist) { throw new BrowserslistError( dir + ' contains both .browserslistrc and package.json with browsers' ) } else if (isFile(config) && isFile(rc)) { throw new BrowserslistError( dir + ' contains both .browserslistrc and browserslist' ) } else if (isFile(config)) { return module.exports.readConfig(config) } else if (isFile(rc)) { return module.exports.readConfig(rc) } else { return pkgBrowserslist } }) if (!process.env.BROWSERSLIST_DISABLE_CACHE) { passed.forEach(function (dir) { configCache[dir] = resolved }) } return resolved }, clearCaches: function clearCaches() { dataTimeChecked = false filenessCache = {} configCache = {} this.cache = {} }, oldDataWarning: function oldDataWarning(agentsObj) { if (dataTimeChecked) return dataTimeChecked = true if (process.env.BROWSERSLIST_IGNORE_OLD_DATA) return var latest = latestReleaseTime(agentsObj) var halfYearAgo = Date.now() - TIME_TO_UPDATE_CANIUSE if (latest !== 0 && latest < halfYearAgo) { console.warn( 'Browserslist: caniuse-lite is outdated. Please run:\n' + ' npx update-browserslist-db@latest\n' + ' Why you should do it regularly: ' + 'https://github.com/browserslist/update-db#readme' ) } }, currentNode: function currentNode() { return 'node ' + process.versions.node }, env: process.env }