forked from M3-Academy/challenge-algorithms-v2.0
408 lines
11 KiB
JavaScript
408 lines
11 KiB
JavaScript
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 {
|
|
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'
|
|
}
|
|
|
|
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]
|
|
// eslint-disable-next-line max-len
|
|
// 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) {
|
|
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
|
|
}
|
|
}
|