// Do this as the first thing so that any code reading it knows the right env. process.env.NODE_ENV = 'production'; // Load environment variables from .env file. Suppress warnings using silent // if this file is missing. dotenv will never modify any environment variables // that have already been set. // https://github.com/motdotla/dotenv require('dotenv').config({silent: true}); var chalk = require('chalk'); var fs = require('fs-extra'); var path = require('path'); var pathExists = require('path-exists'); var filesize = require('filesize'); var gzipSize = require('gzip-size').sync; var webpack = require('webpack'); var config = require('../config/webpack.config.prod'); var paths = require('../config/paths'); var checkRequiredFiles = require('react-dev-utils/checkRequiredFiles'); var recursive = require('recursive-readdir'); var stripAnsi = require('strip-ansi'); var useYarn = pathExists.sync(paths.yarnLockFile); // Warn and crash if required files are missing if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) { process.exit(1); } // Input: /User/dan/app/build/static/js/main.82be8.js // Output: /static/js/main.js function removeFileNameHash(fileName) { return fileName .replace(paths.appBuild, '') .replace(/\/?(.*)(\.\w+)(\.js|\.css)/, (match, p1, p2, p3) => p1 + p3); } // Input: 1024, 2048 // Output: "(+1 KB)" function getDifferenceLabel(currentSize, previousSize) { var FIFTY_KILOBYTES = 1024 * 50; var difference = currentSize - previousSize; var fileSize = !Number.isNaN(difference) ? filesize(difference) : 0; if (difference >= FIFTY_KILOBYTES) { return chalk.red('+' + fileSize); } else if (difference < FIFTY_KILOBYTES && difference > 0) { return chalk.yellow('+' + fileSize); } else if (difference < 0) { return chalk.green(fileSize); } else { return ''; } } // First, read the current file sizes in build directory. // This lets us display how much they changed later. recursive(paths.appBuild, (err, fileNames) => { var previousSizeMap = (fileNames || []) .filter(fileName => /\.(js|css)$/.test(fileName)) .reduce((memo, fileName) => { var contents = fs.readFileSync(fileName); var key = removeFileNameHash(fileName); memo[key] = gzipSize(contents); return memo; }, {}); // Remove all content but keep the directory so that // if you're in it, you don't end up in Trash fs.emptyDirSync(paths.appBuild); // Start the webpack build build(previousSizeMap); // Merge with the public folder copyPublicFolder(); }); // Print a detailed summary of build files. function printFileSizes(stats, previousSizeMap) { var assets = stats.toJson().assets .filter(asset => /\.(js|css)$/.test(asset.name)) .map(asset => { var fileContents = fs.readFileSync(paths.appBuild + '/' + asset.name); var size = gzipSize(fileContents); var previousSize = previousSizeMap[removeFileNameHash(asset.name)]; var difference = getDifferenceLabel(size, previousSize); return { folder: path.join('build_webpack', path.dirname(asset.name)), name: path.basename(asset.name), size: size, sizeLabel: filesize(size) + (difference ? ' (' + difference + ')' : '') }; }); assets.sort((a, b) => b.size - a.size); var longestSizeLabelLength = Math.max.apply(null, assets.map(a => stripAnsi(a.sizeLabel).length) ); assets.forEach(asset => { var sizeLabel = asset.sizeLabel; var sizeLength = stripAnsi(sizeLabel).length; if (sizeLength < longestSizeLabelLength) { var rightPadding = ' '.repeat(longestSizeLabelLength - sizeLength); sizeLabel += rightPadding; } console.log( ' ' + sizeLabel + ' ' + chalk.dim(asset.folder + path.sep) + chalk.cyan(asset.name) ); }); } // Print out errors function printErrors(summary, errors) { console.log(chalk.red(summary)); console.log(); errors.forEach(err => { console.log(err.message || err); console.log(); }); } // Create the production build and print the deployment instructions. function build(previousSizeMap) { console.log('Creating an optimized production build...'); webpack(config).run((err, stats) => { if (err) { printErrors('Failed to compile.', [err]); process.exit(1); } if (stats.compilation.errors.length) { printErrors('Failed to compile.', stats.compilation.errors); process.exit(1); } if (process.env.CI && stats.compilation.warnings.length) { printErrors('Failed to compile.', stats.compilation.warnings); process.exit(1); } console.log(chalk.green('Compiled successfully.')); console.log(); console.log('File sizes after gzip:'); console.log(); printFileSizes(stats, previousSizeMap); console.log(); var openCommand = process.platform === 'win32' ? 'start' : 'open'; var appPackage = require(paths.appPackageJson); var homepagePath = appPackage.homepage; var publicPath = config.output.publicPath; if (homepagePath && homepagePath.indexOf('.github.io/') !== -1) { // "homepage": "http://user.github.io/project" console.log('The project was built assuming it is hosted at ' + chalk.green(publicPath) + '.'); console.log('You can control this with the ' + chalk.green('homepage') + ' field in your ' + chalk.cyan('package.json') + '.'); console.log(); console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.'); console.log('To publish it at ' + chalk.green(homepagePath) + ', run:'); // If script deploy has been added to package.json, skip the instructions if (typeof appPackage.scripts.deploy === 'undefined') { console.log(); if (useYarn) { console.log(' ' + chalk.cyan('yarn') + ' add --dev gh-pages'); } else { console.log(' ' + chalk.cyan('npm') + ' install --save-dev gh-pages'); } console.log(); console.log('Add the following script in your ' + chalk.cyan('package.json') + '.'); console.log(); console.log(' ' + chalk.dim('// ...')); console.log(' ' + chalk.yellow('"scripts"') + ': {'); console.log(' ' + chalk.dim('// ...')); console.log(' ' + chalk.yellow('"deploy"') + ': ' + chalk.yellow('"npm run build&&gh-pages -d build"')); console.log(' }'); console.log(); console.log('Then run:'); } console.log(); console.log(' ' + chalk.cyan(useYarn ? 'yarn' : 'npm') + ' run deploy'); console.log(); } else if (publicPath !== '/') { // "homepage": "http://mywebsite.com/project" console.log('The project was built assuming it is hosted at ' + chalk.green(publicPath) + '.'); console.log('You can control this with the ' + chalk.green('homepage') + ' field in your ' + chalk.cyan('package.json') + '.'); console.log(); console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.'); console.log(); } else { // no homepage or "homepage": "http://mywebsite.com" console.log('The project was built assuming it is hosted at the server root.'); if (homepagePath) { // "homepage": "http://mywebsite.com" console.log('You can control this with the ' + chalk.green('homepage') + ' field in your ' + chalk.cyan('package.json') + '.'); console.log(); } else { // no homepage console.log('To override this, specify the ' + chalk.green('homepage') + ' in your ' + chalk.cyan('package.json') + '.'); console.log('For example, add this to build it for GitHub Pages:') console.log(); console.log(' ' + chalk.green('"homepage"') + chalk.cyan(': ') + chalk.green('"http://myname.github.io/myapp"') + chalk.cyan(',')); console.log(); } console.log('The ' + chalk.cyan('build_webpack') + ' folder is ready to be deployed.'); console.log('You may also serve it locally with a static server:') console.log(); if (useYarn) { console.log(' ' + chalk.cyan('yarn') + ' global add pushstate-server'); } else { console.log(' ' + chalk.cyan('npm') + ' install -g pushstate-server'); } console.log(' ' + chalk.cyan('pushstate-server') + ' build'); console.log(' ' + chalk.cyan(openCommand) + ' http://localhost:9000'); console.log(); } }); } function copyPublicFolder() { fs.copySync(paths.appPublic, paths.appBuild, { dereference: true, filter: file => file !== paths.appHtml }); }