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