Current File : /home/opti/workflow/node_modules/browserslist/node.js
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 FORMAT = 'Browserslist config should be a string or an array ' +
'of strings with browser queries'
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 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'
}
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 (Array.isArray(list)) {
list = { defaults: list }
}
for (var i in list) {
check(list[i])
}
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(require.resolve(name, { paths: ['.'] }))
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)
}
}
if (stats && 'dataByBrowser' in stats) {
stats = stats.dataByBrowser
}
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
}
},
loadCountry: function loadCountry (usage, country) {
var code = country.replace(/[^\w-]/g, '')
if (!usage[code]) {
// eslint-disable-next-line security/detect-non-literal-require
var compressed = require('caniuse-lite/data/regions/' + code + '.js')
var data = region(compressed)
usage[country] = { }
for (var i in data) {
for (var j in data[i]) {
usage[country][i + ' ' + j] = data[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(
'Dublicate 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 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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