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January 18, 2023 20:50
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#!/usr/bin/env node
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var updateDb = require('update-browserslist-db')
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var fs = require('fs')
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var browserslist = require('./')
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var pkg = require('./package.json')
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var args = process.argv.slice(2)
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var USAGE =
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'Usage:\n' +
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' npx browserslist\n' +
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' npx browserslist "QUERIES"\n' +
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' npx browserslist --json "QUERIES"\n' +
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' npx browserslist --config="path/to/browserlist/file"\n' +
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' npx browserslist --coverage "QUERIES"\n' +
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' npx browserslist --coverage=US "QUERIES"\n' +
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' npx browserslist --coverage=US,RU,global "QUERIES"\n' +
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' npx browserslist --env="environment name defined in config"\n' +
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' npx browserslist --stats="path/to/browserlist/stats/file"\n' +
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' npx browserslist --mobile-to-desktop\n' +
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' npx browserslist --ignore-unknown-versions\n'
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function isArg(arg) {
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return args.some(function (str) {
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return str === arg || str.indexOf(arg + '=') === 0
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})
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}
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function error(msg) {
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process.stderr.write('browserslist: ' + msg + '\n')
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process.exit(1)
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}
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if (isArg('--help') || isArg('-h')) {
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process.stdout.write(pkg.description + '.\n\n' + USAGE + '\n')
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} else if (isArg('--version') || isArg('-v')) {
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process.stdout.write('browserslist ' + pkg.version + '\n')
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} else if (isArg('--update-db')) {
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/* c8 ignore next 3 */
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updateDb(function (str) {
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process.stdout.write(str)
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})
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} else {
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var mode = 'browsers'
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var opts = {}
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var queries
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var areas
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for (var i = 0; i < args.length; i++) {
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if (args[i][0] !== '-') {
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queries = args[i].replace(/^["']|["']$/g, '')
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continue
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}
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var arg = args[i].split('=')
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var name = arg[0]
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var value = arg[1]
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if (value) value = value.replace(/^["']|["']$/g, '')
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if (name === '--config' || name === '-b') {
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opts.config = value
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} else if (name === '--env' || name === '-e') {
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opts.env = value
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} else if (name === '--stats' || name === '-s') {
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opts.stats = value
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} else if (name === '--coverage' || name === '-c') {
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if (mode !== 'json') mode = 'coverage'
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if (value) {
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areas = value.split(',')
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} else {
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areas = ['global']
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}
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} else if (name === '--json') {
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mode = 'json'
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} else if (name === '--mobile-to-desktop') {
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/* c8 ignore next */
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opts.mobileToDesktop = true
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} else if (name === '--ignore-unknown-versions') {
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/* c8 ignore next */
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opts.ignoreUnknownVersions = true
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} else {
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error('Unknown arguments ' + args[i] + '.\n\n' + USAGE)
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}
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}
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var browsers
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try {
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browsers = browserslist(queries, opts)
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} catch (e) {
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if (e.name === 'BrowserslistError') {
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error(e.message)
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} /* c8 ignore start */ else {
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throw e
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} /* c8 ignore end */
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}
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var coverage
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if (mode === 'browsers') {
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browsers.forEach(function (browser) {
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process.stdout.write(browser + '\n')
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})
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} else if (areas) {
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coverage = areas.map(function (area) {
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var stats
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if (area !== 'global') {
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stats = area
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} else if (opts.stats) {
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stats = JSON.parse(fs.readFileSync(opts.stats))
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}
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var result = browserslist.coverage(browsers, stats)
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var round = Math.round(result * 100) / 100.0
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return [area, round]
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})
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if (mode === 'coverage') {
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var prefix = 'These browsers account for '
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process.stdout.write(prefix)
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coverage.forEach(function (data, index) {
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var area = data[0]
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var round = data[1]
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var end = 'globally'
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if (area && area !== 'global') {
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end = 'in the ' + area.toUpperCase()
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} else if (opts.stats) {
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end = 'in custom statistics'
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}
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if (index !== 0) {
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process.stdout.write(prefix.replace(/./g, ' '))
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}
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process.stdout.write(round + '% of all users ' + end + '\n')
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})
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}
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}
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if (mode === 'json') {
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var data = { browsers: browsers }
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if (coverage) {
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data.coverage = coverage.reduce(function (object, j) {
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object[j[0]] = j[1]
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return object
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}, {})
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}
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process.stdout.write(JSON.stringify(data, null, ' ') + '\n')
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}
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}