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node_modules/browserslist/cli.js

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+#!/usr/bin/env node
+
+var fs = require('fs')
+
+var browserslist = require('./')
+var updateDb = require('./update-db')
+var pkg = require('./package.json')
+
+var args = process.argv.slice(2)
+
+var USAGE =
+  'Usage:\n' +
+  '  npx browserslist\n' +
+  '  npx browserslist "QUERIES"\n' +
+  '  npx browserslist --json "QUERIES"\n' +
+  '  npx browserslist --config="path/to/browserlist/file"\n' +
+  '  npx browserslist --coverage "QUERIES"\n' +
+  '  npx browserslist --coverage=US "QUERIES"\n' +
+  '  npx browserslist --coverage=US,RU,global "QUERIES"\n' +
+  '  npx browserslist --env="environment name defined in config"\n' +
+  '  npx browserslist --stats="path/to/browserlist/stats/file"\n' +
+  '  npx browserslist --mobile-to-desktop\n' +
+  '  npx browserslist --ignore-unknown-versions' +
+  '  npx browserslist --update-db'
+
+function isArg(arg) {
+  return args.some(function (str) {
+    return str === arg || str.indexOf(arg + '=') === 0
+  })
+}
+
+function error(msg) {
+  process.stderr.write('browserslist: ' + 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('browserslist ' + pkg.version + '\n')
+} else if (isArg('--update-db')) {
+  updateDb(function (str) {
+    process.stdout.write(str)
+  })
+} 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 if (name === '--mobile-to-desktop') {
+      opts.mobileToDesktop = true
+    } else if (name === '--ignore-unknown-versions') {
+      opts.ignoreUnknownVersions = true
+    } 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')
+  }
+}