130 lines
4.1 KiB
JavaScript
130 lines
4.1 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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* @format
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*/
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'use strict';
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require('../../setupBabel')();
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const Metro = require('metro');
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const {Terminal} = require('metro-core');
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const messageSocket = require('./util/messageSocket');
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const morgan = require('morgan');
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const path = require('path');
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const webSocketProxy = require('./util/webSocketProxy');
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const MiddlewareManager = require('./middleware/MiddlewareManager');
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import type {ConfigT} from 'metro-config/src/configTypes.flow';
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export type Args = {|
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+assetExts: $ReadOnlyArray<string>,
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+cert: string,
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+customLogReporterPath?: string,
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+host: string,
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+https: boolean,
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+maxWorkers: number,
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+key: string,
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+nonPersistent: boolean,
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+platforms: $ReadOnlyArray<string>,
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+port: number,
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+projectRoot: string,
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+providesModuleNodeModules: Array<string>,
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+resetCache: boolean,
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+sourceExts: $ReadOnlyArray<string>,
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+transformer?: string,
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+verbose: boolean,
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+watchFolders: $ReadOnlyArray<string>,
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|};
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async function runServer(args: Args, config: ConfigT) {
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const terminal = new Terminal(process.stdout);
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const ReporterImpl = getReporterImpl(args.customLogReporterPath || null);
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const reporter = new ReporterImpl(terminal);
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const middlewareManager = new MiddlewareManager(args);
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middlewareManager.getConnectInstance().use(morgan('combined'));
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args.watchFolders.forEach(middlewareManager.serveStatic);
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// $FlowFixMe Metro configuration is immutable.
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config.maxWorkers = args.maxWorkers;
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// $FlowFixMe Metro configuration is immutable.
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config.server.port = args.port;
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// $FlowFixMe Metro configuration is immutable.
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config.reporter = reporter;
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// $FlowFixMe Metro configuration is immutable.
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config.resetCache = args.resetCache;
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// $FlowFixMe Metro configuration is immutable.
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config.projectRoot = args.projectRoot;
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// $FlowFixMe Metro configuration is immutable.
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config.watchFolders = args.watchFolders.slice(0);
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// $FlowFixMe Metro configuration is immutable.
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config.server.enhanceMiddleware = middleware =>
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middlewareManager.getConnectInstance().use(middleware);
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if (args.sourceExts !== config.resolver.sourceExts) {
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// $FlowFixMe Metro configuration is immutable.
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config.resolver.sourceExts = args.sourceExts.concat(
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config.resolver.sourceExts,
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);
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}
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const serverInstance = await Metro.runServer(config, {
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host: args.host,
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secure: args.https,
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secureCert: args.cert,
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secureKey: args.key,
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hmrEnabled: true,
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});
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const wsProxy = webSocketProxy.attachToServer(
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serverInstance,
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'/debugger-proxy',
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);
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const ms = messageSocket.attachToServer(serverInstance, '/message');
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middlewareManager.attachDevToolsSocket(wsProxy);
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middlewareManager.attachDevToolsSocket(ms);
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// In Node 8, the default keep-alive for an HTTP connection is 5 seconds. In
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// early versions of Node 8, this was implemented in a buggy way which caused
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// some HTTP responses (like those containing large JS bundles) to be
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// terminated early.
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//
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// As a workaround, arbitrarily increase the keep-alive from 5 to 30 seconds,
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// which should be enough to send even the largest of JS bundles.
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//
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// For more info: https://github.com/nodejs/node/issues/13391
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//
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serverInstance.keepAliveTimeout = 30000;
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}
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function getReporterImpl(customLogReporterPath: ?string) {
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if (customLogReporterPath == null) {
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return require('metro/src/lib/TerminalReporter');
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}
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try {
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// First we let require resolve it, so we can require packages in node_modules
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// as expected. eg: require('my-package/reporter');
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/* $FlowFixMe: can't type dynamic require */
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return require(customLogReporterPath);
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} catch (e) {
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if (e.code !== 'MODULE_NOT_FOUND') {
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throw e;
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}
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// If that doesn't work, then we next try relative to the cwd, eg:
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// require('./reporter');
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/* $FlowFixMe: can't type dynamic require */
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return require(path.resolve(customLogReporterPath));
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}
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}
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module.exports = runServer;
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