mirror of
https://github.com/zhigang1992/create-react-app.git
synced 2026-03-29 22:38:26 +08:00
b88d6655eb
* Refactor start script into modules * Move dev server config into config file * Replace eject file whitelist with a "remove-file-on-eject" flag * Move utils into scripts folder (for inclusion in ejection) * Add missed changes * Pass showInstructions as an argument * Fix eject bug * Don't eject babelTransform
113 lines
3.8 KiB
JavaScript
113 lines
3.8 KiB
JavaScript
// @remove-on-eject-begin
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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// @remove-on-eject-end
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process.env.NODE_ENV = 'development';
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// Load environment variables from .env file. Suppress warnings using silent
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// if this file is missing. dotenv will never modify any environment variables
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// that have already been set.
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// https://github.com/motdotla/dotenv
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require('dotenv').config({silent: true});
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var fs = require('fs');
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var chalk = require('chalk');
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var detect = require('detect-port');
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var WebpackDevServer = require('webpack-dev-server');
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var clearConsole = require('react-dev-utils/clearConsole');
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var checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
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var getProcessForPort = require('react-dev-utils/getProcessForPort');
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var openBrowser = require('react-dev-utils/openBrowser');
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var prompt = require('react-dev-utils/prompt');
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var paths = require('../config/paths');
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var config = require('../config/webpack.config.dev');
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var devServerConfig = require('../config/webpackDevServer.config');
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var createWebpackCompiler = require('./utils/createWebpackCompiler');
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var addWebpackMiddleware = require('./utils/addWebpackMiddleware');
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var useYarn = fs.existsSync(paths.yarnLockFile);
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var cli = useYarn ? 'yarn' : 'npm';
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var 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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// Tools like Cloud9 rely on this.
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var DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000;
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function run(port) {
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var protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
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var host = process.env.HOST || 'localhost';
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// Create a webpack compiler that is configured with custom messages.
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var compiler = createWebpackCompiler(config, function onReady(showInstructions) {
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if (!showInstructions) {
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return;
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}
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console.log();
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console.log('The app is running at:');
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console.log();
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console.log(' ' + chalk.cyan(protocol + '://' + host + ':' + port + '/'));
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console.log();
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console.log('Note that the development build is not optimized.');
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console.log('To create a production build, use ' + chalk.cyan(cli + ' run build') + '.');
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console.log();
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});
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// Serve webpack assets generated by the compiler over a web sever.
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var devServer = new WebpackDevServer(compiler, devServerConfig);
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// Our custom middleware proxies requests to /index.html or a remote API.
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addWebpackMiddleware(devServer);
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// Launch WebpackDevServer.
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devServer.listen(port, (err, result) => {
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if (err) {
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return console.log(err);
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}
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if (isInteractive) {
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clearConsole();
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}
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console.log(chalk.cyan('Starting the development server...'));
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console.log();
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openBrowser(protocol + '://' + host + ':' + port + '/');
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});
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}
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// We attempt to use the default port but if it is busy, we offer the user to
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// run on a different port. `detect()` Promise resolves to the next free port.
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detect(DEFAULT_PORT).then(port => {
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if (port === DEFAULT_PORT) {
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run(port);
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return;
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}
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if (isInteractive) {
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clearConsole();
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var existingProcess = getProcessForPort(DEFAULT_PORT);
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var question =
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chalk.yellow('Something is already running on port ' + DEFAULT_PORT + '.' +
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((existingProcess) ? ' Probably:\n ' + existingProcess : '')) +
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'\n\nWould you like to run the app on another port instead?';
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prompt(question, true).then(shouldChangePort => {
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if (shouldChangePort) {
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run(port);
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}
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});
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} else {
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console.log(chalk.red('Something is already running on port ' + DEFAULT_PORT + '.'));
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}
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});
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