"use strict"; // Do this as the first thing so that any code reading it knows the right env. process.env.BABEL_ENV = "development"; process.env.NODE_ENV = "development"; // If we want BAPS, specify it as the first command line argument. var args = process.argv.slice(2); // Remove node start.js if (args.length > 0 && args[0] === "baps") { // We set this here first; later on, in env.js, we'll reference it to load in // the other variables from .env.baps-${NODE_ENV} process.env.REACT_APP_BAPSICLE_INTERFACE = "true"; } // Makes the script crash on unhandled rejections instead of silently // ignoring them. In the future, promise rejections that are not handled will // terminate the Node.js process with a non-zero exit code. process.on("unhandledRejection", (err) => { throw err; }); // Ensure environment variables are read. require("../config/env"); const fs = require("fs"); const chalk = require("react-dev-utils/chalk"); const webpack = require("webpack"); const WebpackDevServer = require("webpack-dev-server"); const clearConsole = require("react-dev-utils/clearConsole"); const checkRequiredFiles = require("react-dev-utils/checkRequiredFiles"); const { choosePort, createCompiler, prepareProxy, prepareUrls, } = require("react-dev-utils/WebpackDevServerUtils"); const openBrowser = require("react-dev-utils/openBrowser"); const paths = require("../config/paths"); const configFactory = require("../config/webpack.config"); const createDevServerConfig = require("../config/webpackDevServer.config"); const useYarn = fs.existsSync(paths.yarnLockFile); const isInteractive = process.stdout.isTTY; // Warn and crash if required files are missing if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) { process.exit(1); } // Tools like Cloud9 rely on this. const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000; const HOST = process.env.HOST || "0.0.0.0"; if (process.env.HOST) { console.log( chalk.cyan( `Attempting to bind to HOST environment variable: ${chalk.yellow( chalk.bold(process.env.HOST) )}` ) ); console.log( `If this was unintentional, check that you haven't mistakenly set it in your shell.` ); console.log( `Learn more here: ${chalk.yellow("https://bit.ly/CRA-advanced-config")}` ); console.log(); } // We require that you explicitly set browsers and do not fall back to // browserslist defaults. const { checkBrowsers } = require("react-dev-utils/browsersHelper"); checkBrowsers(paths.appPath, isInteractive) .then(() => { // We attempt to use the default port but if it is busy, we offer the user to // run on a different port. `choosePort()` Promise resolves to the next free port. return choosePort(HOST, DEFAULT_PORT); }) .then((port) => { if (port == null) { // We have not found a port. return; } const config = configFactory("development"); const protocol = process.env.HTTPS === "true" ? "https" : "http"; const appName = require(paths.appPackageJson).name; const useTypeScript = fs.existsSync(paths.appTsConfig); const tscCompileOnError = process.env.TSC_COMPILE_ON_ERROR === "true"; const urls = prepareUrls(protocol, HOST, port); const devSocket = { warnings: (warnings) => devServer.sockWrite(devServer.sockets, "warnings", warnings), errors: (errors) => devServer.sockWrite(devServer.sockets, "errors", errors), }; // Create a webpack compiler that is configured with custom messages. const compiler = createCompiler({ appName, config, devSocket, urls, useYarn, useTypeScript, tscCompileOnError, webpack, }); // Load proxy config const proxySetting = require(paths.appPackageJson).proxy; const proxyConfig = prepareProxy(proxySetting, paths.appPublic); // Serve webpack assets generated by the compiler over a web server. const serverConfig = createDevServerConfig( proxyConfig, urls.lanUrlForConfig ); const devServer = new WebpackDevServer(compiler, serverConfig); // Launch WebpackDevServer. devServer.listen(port, HOST, (err) => { if (err) { return console.log(err); } if (isInteractive) { clearConsole(); } // We used to support resolving modules according to `NODE_PATH`. // This now has been deprecated in favor of jsconfig/tsconfig.json // This lets you use absolute paths in imports inside large monorepos: if (process.env.NODE_PATH) { console.log( chalk.yellow( "Setting NODE_PATH to resolve modules absolutely has been deprecated in favor of setting baseUrl in jsconfig.json (or tsconfig.json if you are using TypeScript) and will be removed in a future major release of create-react-app." ) ); console.log(); } console.log(chalk.cyan("Starting the development server...\n")); openBrowser(urls.localUrlForBrowser); }); ["SIGINT", "SIGTERM"].forEach(function(sig) { process.on(sig, function() { devServer.close(); process.exit(); }); }); }) .catch((err) => { if (err && err.message) { console.log(err.message); } process.exit(1); });