+++ /dev/null
-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 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.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 loc = path.resolve(file)
- do {
- var result = callback(loc)
- if (typeof result !== 'undefined') return result
- } while (loc !== (loc = path.dirname(loc)))
- return undefined
-}
-
-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 = 'development'
- }
-
- return config[name] || config.defaults
-}
-
-function parsePackage (file) {
- var config = JSON.parse(fs.readFileSync(file))
- if (config.browserlist && !config.browserslist) {
- throw new BrowserslistError(
- '`browserlist` key instead of `browserslist` in ' + file)
- }
- var list = config.browserslist
- if (typeof list === 'object' && list.length) {
- list = { defaults: list }
- }
- return list
-}
-
-module.exports = {
- loadQueries: function loadQueries (context, name) {
- if (!context.dangerousExtend) checkExtend(name)
- // eslint-disable-next-line security/detect-non-literal-require
- var queries = require(name)
- if (!Array.isArray(queries)) {
- throw new BrowserslistError(
- '`' + name + '` config exports not an array of queries')
- }
- return queries
- },
-
- getStat: function getStat (opts) {
- 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 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
- }
- },
-
- parseConfig: function parseConfig (string) {
- var result = { defaults: [] }
- var section = '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)) {
- section = line.match(IS_SECTION)[1].trim()
- result[section] = result[section] || []
- } else {
- 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 cacheKey = isFile(from) ? path.dirname(from) : from
- if (cacheKey in configCache) {
- return configCache[cacheKey]
- }
-
- var resolved = eachParent(from, function (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) {
- configCache[cacheKey] = resolved
- }
- return resolved
- },
-
- clearCaches: function clearCaches () {
- filenessCache = { }
- configCache = { }
- }
-}
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