218 řádky
7.0 KiB
JavaScript
218 řádky
7.0 KiB
JavaScript
'use strict';
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// Do this as the first thing so that any code reading it knows the right env.
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process.env.BABEL_ENV = 'production';
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process.env.NODE_ENV = 'production';
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// Makes the script crash on unhandled rejections instead of silently
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// ignoring them. In the future, promise rejections that are not handled will
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// terminate the Node.js process with a non-zero exit code.
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process.on('unhandledRejection', err => {
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throw err;
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});
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// Ensure environment variables are read.
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require('../config/env');
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const path = require('path');
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const chalk = require('react-dev-utils/chalk');
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const fs = require('fs-extra');
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const bfj = require('bfj');
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const webpack = require('webpack');
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const configFactory = require('../config/webpack.config');
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const paths = require('../config/paths');
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const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
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const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
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const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
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const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
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const printBuildError = require('react-dev-utils/printBuildError');
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const measureFileSizesBeforeBuild =
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FileSizeReporter.measureFileSizesBeforeBuild;
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const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
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const useYarn = fs.existsSync(paths.yarnLockFile);
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// These sizes are pretty large. We'll warn for bundles exceeding them.
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const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
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const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
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const isInteractive = process.stdout.isTTY;
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// Warn and crash if required files are missing
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if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
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process.exit(1);
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}
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const argv = process.argv.slice(2);
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const writeStatsJson = argv.indexOf('--stats') !== -1;
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// Generate configuration
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const config = configFactory('production');
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// We require that you explicitly set browsers and do not fall back to
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// browserslist defaults.
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const { checkBrowsers } = require('react-dev-utils/browsersHelper');
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checkBrowsers(paths.appPath, isInteractive)
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.then(() => {
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// First, read the current file sizes in build directory.
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// This lets us display how much they changed later.
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return measureFileSizesBeforeBuild(paths.appBuild);
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})
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.then(previousFileSizes => {
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// Remove all content but keep the directory so that
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// if you're in it, you don't end up in Trash
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fs.emptyDirSync(paths.appBuild);
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// Merge with the public folder
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copyPublicFolder();
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// Start the webpack build
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return build(previousFileSizes);
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})
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.then(
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({ stats, previousFileSizes, warnings }) => {
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if (warnings.length) {
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console.log(chalk.yellow('Compiled with warnings.\n'));
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console.log(warnings.join('\n\n'));
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console.log(
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'\nSearch for the ' +
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chalk.underline(chalk.yellow('keywords')) +
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' to learn more about each warning.'
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);
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console.log(
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'To ignore, add ' +
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chalk.cyan('// eslint-disable-next-line') +
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' to the line before.\n'
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);
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} else {
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console.log(chalk.green('Compiled successfully.\n'));
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}
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console.log('File sizes after gzip:\n');
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printFileSizesAfterBuild(
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stats,
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previousFileSizes,
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paths.appBuild,
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WARN_AFTER_BUNDLE_GZIP_SIZE,
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WARN_AFTER_CHUNK_GZIP_SIZE
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);
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console.log();
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const appPackage = require(paths.appPackageJson);
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const publicUrl = paths.publicUrlOrPath;
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const publicPath = config.output.publicPath;
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const buildFolder = path.relative(process.cwd(), paths.appBuild);
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printHostingInstructions(
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appPackage,
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publicUrl,
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publicPath,
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buildFolder,
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useYarn
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);
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},
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err => {
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const tscCompileOnError = process.env.TSC_COMPILE_ON_ERROR === 'true';
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if (tscCompileOnError) {
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console.log(
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chalk.yellow(
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'Compiled with the following type errors (you may want to check these before deploying your app):\n'
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)
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);
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printBuildError(err);
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} else {
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console.log(chalk.red('Failed to compile.\n'));
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printBuildError(err);
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process.exit(1);
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}
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}
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)
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.catch(err => {
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if (err && err.message) {
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console.log(err.message);
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}
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process.exit(1);
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});
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// Create the production build and print the deployment instructions.
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function build(previousFileSizes) {
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console.log('Creating an optimized production build...');
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const compiler = webpack(config);
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return new Promise((resolve, reject) => {
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compiler.run((err, stats) => {
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let messages;
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if (err) {
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if (!err.message) {
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return reject(err);
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}
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let errMessage = err.message;
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// Add additional information for postcss errors
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if (Object.prototype.hasOwnProperty.call(err, 'postcssNode')) {
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errMessage +=
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'\nCompileError: Begins at CSS selector ' +
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err['postcssNode'].selector;
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}
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messages = formatWebpackMessages({
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errors: [errMessage],
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warnings: [],
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});
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} else {
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messages = formatWebpackMessages(
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stats.toJson({ all: false, warnings: true, errors: true })
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);
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}
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if (messages.errors.length) {
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// Only keep the first error. Others are often indicative
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// of the same problem, but confuse the reader with noise.
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if (messages.errors.length > 1) {
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messages.errors.length = 1;
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}
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return reject(new Error(messages.errors.join('\n\n')));
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}
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if (
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process.env.CI &&
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(typeof process.env.CI !== 'string' ||
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process.env.CI.toLowerCase() !== 'false') &&
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messages.warnings.length
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) {
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// Ignore sourcemap warnings in CI builds. See #8227 for more info.
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const filteredWarnings = messages.warnings.filter(
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w => !/Failed to parse source map/.test(w)
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);
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if (filteredWarnings.length) {
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console.log(
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chalk.yellow(
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'\nTreating warnings as errors because process.env.CI = true.\n' +
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'Most CI servers set it automatically.\n'
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)
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);
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return reject(new Error(filteredWarnings.join('\n\n')));
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}
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}
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const resolveArgs = {
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stats,
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previousFileSizes,
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warnings: messages.warnings,
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};
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if (writeStatsJson) {
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return bfj
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.write(paths.appBuild + '/bundle-stats.json', stats.toJson())
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.then(() => resolve(resolveArgs))
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.catch(error => reject(new Error(error)));
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}
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return resolve(resolveArgs);
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});
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});
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}
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function copyPublicFolder() {
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fs.copySync(paths.appPublic, paths.appBuild, {
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dereference: true,
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filter: file => file !== paths.appHtml,
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});
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}
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