|
| 1 | +'use strict'; |
| 2 | + |
| 3 | +// Do this as the first thing so that any code reading it knows the right env. |
| 4 | +process.env.BABEL_ENV = 'production'; |
| 5 | +process.env.NODE_ENV = 'production'; |
| 6 | + |
| 7 | +// Makes the script crash on unhandled rejections instead of silently |
| 8 | +// ignoring them. In the future, promise rejections that are not handled will |
| 9 | +// terminate the Node.js process with a non-zero exit code. |
| 10 | +process.on('unhandledRejection', err => { |
| 11 | + throw err; |
| 12 | +}); |
| 13 | + |
| 14 | +// Ensure environment variables are read. |
| 15 | +require('../config/env'); |
| 16 | + |
| 17 | +const path = require('path'); |
| 18 | +const chalk = require('chalk'); |
| 19 | +const fs = require('fs-extra'); |
| 20 | +const webpack = require('webpack'); |
| 21 | +const config = require('../config/webpack.config.prod'); |
| 22 | +const paths = require('../config/paths'); |
| 23 | +const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles'); |
| 24 | +const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages'); |
| 25 | +const printHostingInstructions = require('react-dev-utils/printHostingInstructions'); |
| 26 | +const FileSizeReporter = require('react-dev-utils/FileSizeReporter'); |
| 27 | + |
| 28 | +const measureFileSizesBeforeBuild = |
| 29 | + FileSizeReporter.measureFileSizesBeforeBuild; |
| 30 | +const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild; |
| 31 | +const useYarn = fs.existsSync(paths.yarnLockFile); |
| 32 | + |
| 33 | +// These sizes are pretty large. We'll warn for bundles exceeding them. |
| 34 | +const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024; |
| 35 | +const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024; |
| 36 | + |
| 37 | +// Warn and crash if required files are missing |
| 38 | +if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) { |
| 39 | + process.exit(1); |
| 40 | +} |
| 41 | + |
| 42 | +// First, read the current file sizes in build directory. |
| 43 | +// This lets us display how much they changed later. |
| 44 | +measureFileSizesBeforeBuild(paths.appBuild) |
| 45 | + .then(previousFileSizes => { |
| 46 | + // Remove all content but keep the directory so that |
| 47 | + // if you're in it, you don't end up in Trash |
| 48 | + fs.emptyDirSync(paths.appBuild); |
| 49 | + // Merge with the public folder |
| 50 | + copyPublicFolder(); |
| 51 | + // Start the webpack build |
| 52 | + return build(previousFileSizes); |
| 53 | + }) |
| 54 | + .then( |
| 55 | + ({ stats, previousFileSizes, warnings }) => { |
| 56 | + if (warnings.length) { |
| 57 | + console.log(chalk.yellow('Compiled with warnings.\n')); |
| 58 | + console.log(warnings.join('\n\n')); |
| 59 | + console.log( |
| 60 | + '\nSearch for the ' + |
| 61 | + chalk.underline(chalk.yellow('keywords')) + |
| 62 | + ' to learn more about each warning.' |
| 63 | + ); |
| 64 | + console.log( |
| 65 | + 'To ignore, add ' + |
| 66 | + chalk.cyan('// eslint-disable-next-line') + |
| 67 | + ' to the line before.\n' |
| 68 | + ); |
| 69 | + } else { |
| 70 | + console.log(chalk.green('Compiled successfully.\n')); |
| 71 | + } |
| 72 | + |
| 73 | + console.log('File sizes after gzip:\n'); |
| 74 | + printFileSizesAfterBuild( |
| 75 | + stats, |
| 76 | + previousFileSizes, |
| 77 | + paths.appBuild, |
| 78 | + WARN_AFTER_BUNDLE_GZIP_SIZE, |
| 79 | + WARN_AFTER_CHUNK_GZIP_SIZE |
| 80 | + ); |
| 81 | + console.log(); |
| 82 | + |
| 83 | + const appPackage = require(paths.appPackageJson); |
| 84 | + const publicUrl = paths.publicUrl; |
| 85 | + const publicPath = config.output.publicPath; |
| 86 | + const buildFolder = path.relative(process.cwd(), paths.appBuild); |
| 87 | + printHostingInstructions( |
| 88 | + appPackage, |
| 89 | + publicUrl, |
| 90 | + publicPath, |
| 91 | + buildFolder, |
| 92 | + useYarn |
| 93 | + ); |
| 94 | + }, |
| 95 | + err => { |
| 96 | + console.log(chalk.red('Failed to compile.\n')); |
| 97 | + console.log((err.message || err) + '\n'); |
| 98 | + process.exit(1); |
| 99 | + } |
| 100 | + ); |
| 101 | + |
| 102 | +// Create the production build and print the deployment instructions. |
| 103 | +function build(previousFileSizes) { |
| 104 | + console.log('Creating an optimized production build...'); |
| 105 | + |
| 106 | + let compiler = webpack(config); |
| 107 | + return new Promise((resolve, reject) => { |
| 108 | + compiler.run((err, stats) => { |
| 109 | + if (err) { |
| 110 | + return reject(err); |
| 111 | + } |
| 112 | + const messages = formatWebpackMessages(stats.toJson({}, true)); |
| 113 | + if (messages.errors.length) { |
| 114 | + return reject(new Error(messages.errors.join('\n\n'))); |
| 115 | + } |
| 116 | + if ( |
| 117 | + process.env.CI && |
| 118 | + (typeof process.env.CI !== 'string' || |
| 119 | + process.env.CI.toLowerCase() !== 'false') && |
| 120 | + messages.warnings.length |
| 121 | + ) { |
| 122 | + console.log( |
| 123 | + chalk.yellow( |
| 124 | + '\nTreating warnings as errors because process.env.CI = true.\n' + |
| 125 | + 'Most CI servers set it automatically.\n' |
| 126 | + ) |
| 127 | + ); |
| 128 | + return reject(new Error(messages.warnings.join('\n\n'))); |
| 129 | + } |
| 130 | + return resolve({ |
| 131 | + stats, |
| 132 | + previousFileSizes, |
| 133 | + warnings: messages.warnings, |
| 134 | + }); |
| 135 | + }); |
| 136 | + }); |
| 137 | +} |
| 138 | + |
| 139 | +function copyPublicFolder() { |
| 140 | + fs.copySync(paths.appPublic, paths.appBuild, { |
| 141 | + dereference: true, |
| 142 | + filter: file => file !== paths.appHtml, |
| 143 | + }); |
| 144 | +} |
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