1 | #!/usr/bin/env node
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2 |
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3 | var fs = require('fs')
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4 |
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5 | var browserslist = require('./')
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6 | var updateDb = require('./update-db')
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7 | var pkg = require('./package.json')
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8 |
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9 | var args = process.argv.slice(2)
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10 |
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11 | var USAGE =
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12 | 'Usage:\n' +
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13 | ' npx browserslist\n' +
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14 | ' npx browserslist "QUERIES"\n' +
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15 | ' npx browserslist --json "QUERIES"\n' +
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16 | ' npx browserslist --config="path/to/browserlist/file"\n' +
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17 | ' npx browserslist --coverage "QUERIES"\n' +
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18 | ' npx browserslist --coverage=US "QUERIES"\n' +
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19 | ' npx browserslist --coverage=US,RU,global "QUERIES"\n' +
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20 | ' npx browserslist --env="environment name defined in config"\n' +
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21 | ' npx browserslist --stats="path/to/browserlist/stats/file"\n' +
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22 | ' npx browserslist --mobile-to-desktop\n' +
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23 | ' npx browserslist --ignore-unknown-versions' +
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24 | ' npx browserslist --update-db'
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25 |
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26 | function isArg(arg) {
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27 | return args.some(function (str) {
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28 | return str === arg || str.indexOf(arg + '=') === 0
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29 | })
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30 | }
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31 |
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32 | function error(msg) {
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33 | process.stderr.write('browserslist: ' + msg + '\n')
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34 | process.exit(1)
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35 | }
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36 |
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37 | if (isArg('--help') || isArg('-h')) {
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38 | process.stdout.write(pkg.description + '.\n\n' + USAGE + '\n')
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39 | } else if (isArg('--version') || isArg('-v')) {
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40 | process.stdout.write('browserslist ' + pkg.version + '\n')
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41 | } else if (isArg('--update-db')) {
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42 | updateDb(function (str) {
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43 | process.stdout.write(str)
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44 | })
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45 | } else {
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46 | var mode = 'browsers'
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47 | var opts = {}
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48 | var queries
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49 | var areas
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50 |
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51 | for (var i = 0; i < args.length; i++) {
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52 | if (args[i][0] !== '-') {
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53 | queries = args[i].replace(/^["']|["']$/g, '')
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54 | continue
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55 | }
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56 |
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57 | var arg = args[i].split('=')
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58 | var name = arg[0]
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59 | var value = arg[1]
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60 |
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61 | if (value) value = value.replace(/^["']|["']$/g, '')
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62 |
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63 | if (name === '--config' || name === '-b') {
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64 | opts.config = value
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65 | } else if (name === '--env' || name === '-e') {
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66 | opts.env = value
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67 | } else if (name === '--stats' || name === '-s') {
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68 | opts.stats = value
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69 | } else if (name === '--coverage' || name === '-c') {
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70 | if (mode !== 'json') mode = 'coverage'
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71 | if (value) {
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72 | areas = value.split(',')
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73 | } else {
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74 | areas = ['global']
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75 | }
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76 | } else if (name === '--json') {
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77 | mode = 'json'
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78 | } else if (name === '--mobile-to-desktop') {
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79 | opts.mobileToDesktop = true
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80 | } else if (name === '--ignore-unknown-versions') {
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81 | opts.ignoreUnknownVersions = true
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82 | } else {
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83 | error('Unknown arguments ' + args[i] + '.\n\n' + USAGE)
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84 | }
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85 | }
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86 |
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87 | var browsers
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88 | try {
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89 | browsers = browserslist(queries, opts)
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90 | } catch (e) {
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91 | if (e.name === 'BrowserslistError') {
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92 | error(e.message)
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93 | } else {
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94 | throw e
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95 | }
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96 | }
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97 |
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98 | var coverage
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99 | if (mode === 'browsers') {
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100 | browsers.forEach(function (browser) {
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101 | process.stdout.write(browser + '\n')
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102 | })
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103 | } else if (areas) {
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104 | coverage = areas.map(function (area) {
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105 | var stats
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106 | if (area !== 'global') {
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107 | stats = area
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108 | } else if (opts.stats) {
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109 | stats = JSON.parse(fs.readFileSync(opts.stats))
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110 | }
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111 | var result = browserslist.coverage(browsers, stats)
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112 | var round = Math.round(result * 100) / 100.0
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113 |
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114 | return [area, round]
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115 | })
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116 |
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117 | if (mode === 'coverage') {
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118 | var prefix = 'These browsers account for '
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119 | process.stdout.write(prefix)
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120 | coverage.forEach(function (data, index) {
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121 | var area = data[0]
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122 | var round = data[1]
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123 | var end = 'globally'
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124 | if (area && area !== 'global') {
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125 | end = 'in the ' + area.toUpperCase()
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126 | } else if (opts.stats) {
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127 | end = 'in custom statistics'
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128 | }
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129 |
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130 | if (index !== 0) {
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131 | process.stdout.write(prefix.replace(/./g, ' '))
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132 | }
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133 |
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134 | process.stdout.write(round + '% of all users ' + end + '\n')
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135 | })
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136 | }
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137 | }
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138 |
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139 | if (mode === 'json') {
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140 | var data = { browsers: browsers }
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141 | if (coverage) {
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142 | data.coverage = coverage.reduce(function (object, j) {
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143 | object[j[0]] = j[1]
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144 | return object
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145 | }, {})
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146 | }
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147 | process.stdout.write(JSON.stringify(data, null, ' ') + '\n')
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148 | }
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149 | }
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