#!/usr/bin/env node
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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 = 'Usage:\n' +
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' ' + pkg.name + '\n' +
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' ' + pkg.name + ' "QUERIES"\n' +
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' ' + pkg.name + ' --config="path/to/browserlist/file"\n' +
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' ' + pkg.name + ' --coverage "QUERIES"\n' +
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' ' + pkg.name + ' --coverage=US "QUERIES"\n' +
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' ' + pkg.name + ' --env="environment name defined in config"\n' +
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' ' + pkg.name + ' --stats="path/to/browserlist/stats/file"'
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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(pkg.name + ': ' + 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(pkg.name + ' ' + pkg.version + '\n')
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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 country
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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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mode = 'coverage'
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if (value) country = value
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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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if (!queries && !opts.config) {
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if (browserslist.findConfig(process.cwd())) {
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opts.path = process.cwd()
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} else {
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error(
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'Browserslist config was not found. ' +
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'Define queries or config path.' +
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'\n\n' + USAGE
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)
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}
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}
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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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} else {
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throw e
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}
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}
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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 {
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var stats
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if (country) {
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stats = country
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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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var end = 'globally'
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if (country && country !== 'global') {
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end = 'in the ' + country.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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process.stdout.write(
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'These browsers account for ' + round + '% of all users ' +
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end + '\n')
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}
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}
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