328 lines
9.3 KiB
JavaScript
328 lines
9.3 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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* @format
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* @flow
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*/
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'use strict';
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const DevSettings = require('./DevSettings');
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const invariant = require('invariant');
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const MetroHMRClient = require('metro/src/lib/bundle-modules/HMRClient');
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const Platform = require('./Platform');
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const prettyFormat = require('pretty-format');
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import NativeRedBox from '../NativeModules/specs/NativeRedBox';
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import * as LogBoxData from '../LogBox/Data/LogBoxData';
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import type {ExtendedError} from '../Core/Devtools/parseErrorStack';
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const pendingEntryPoints = [];
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let hmrClient = null;
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let hmrUnavailableReason: string | null = null;
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let currentCompileErrorMessage: string | null = null;
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let didConnect: boolean = false;
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let pendingLogs: Array<[LogLevel, Array<mixed>]> = [];
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type LogLevel =
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| 'trace'
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| 'info'
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| 'warn'
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| 'error'
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| 'log'
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| 'group'
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| 'groupCollapsed'
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| 'groupEnd'
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| 'debug';
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export type HMRClientNativeInterface = {|
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enable(): void,
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disable(): void,
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registerBundle(requestUrl: string): void,
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log(level: LogLevel, data: Array<mixed>): void,
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setup(
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platform: string,
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bundleEntry: string,
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host: string,
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port: number | string,
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isEnabled: boolean,
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): void,
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|};
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/**
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* HMR Client that receives from the server HMR updates and propagates them
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* runtime to reflects those changes.
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*/
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const HMRClient: HMRClientNativeInterface = {
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enable() {
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if (hmrUnavailableReason !== null) {
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// If HMR became unavailable while you weren't using it,
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// explain why when you try to turn it on.
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// This is an error (and not a warning) because it is shown
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// in response to a direct user action.
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throw new Error(hmrUnavailableReason);
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}
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invariant(hmrClient, 'Expected HMRClient.setup() call at startup.');
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const LoadingView = require('./LoadingView');
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// We use this for internal logging only.
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// It doesn't affect the logic.
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hmrClient.send(JSON.stringify({type: 'log-opt-in'}));
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// When toggling Fast Refresh on, we might already have some stashed updates.
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// Since they'll get applied now, we'll show a banner.
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const hasUpdates = hmrClient.hasPendingUpdates();
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if (hasUpdates) {
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LoadingView.showMessage('Refreshing...', 'refresh');
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}
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try {
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hmrClient.enable();
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} finally {
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if (hasUpdates) {
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LoadingView.hide();
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}
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}
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// There could be a compile error while Fast Refresh was off,
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// but we ignored it at the time. Show it now.
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showCompileError();
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},
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disable() {
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invariant(hmrClient, 'Expected HMRClient.setup() call at startup.');
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hmrClient.disable();
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},
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registerBundle(requestUrl: string) {
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invariant(hmrClient, 'Expected HMRClient.setup() call at startup.');
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pendingEntryPoints.push(requestUrl);
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registerBundleEntryPoints(hmrClient);
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},
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log(level: LogLevel, data: Array<mixed>) {
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if (!hmrClient) {
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// Catch a reasonable number of early logs
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// in case hmrClient gets initialized later.
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pendingLogs.push([level, data]);
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if (pendingLogs.length > 100) {
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pendingLogs.shift();
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}
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return;
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}
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try {
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hmrClient.send(
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JSON.stringify({
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type: 'log',
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level,
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data: data.map(item =>
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typeof item === 'string'
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? item
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: prettyFormat(item, {
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escapeString: true,
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highlight: true,
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maxDepth: 3,
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min: true,
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plugins: [prettyFormat.plugins.ReactElement],
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}),
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),
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}),
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);
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} catch (error) {
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// If sending logs causes any failures we want to silently ignore them
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// to ensure we do not cause infinite-logging loops.
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}
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},
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// Called once by the bridge on startup, even if Fast Refresh is off.
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// It creates the HMR client but doesn't actually set up the socket yet.
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setup(
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platform: string,
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bundleEntry: string,
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host: string,
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port: number | string,
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isEnabled: boolean,
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) {
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invariant(platform, 'Missing required parameter `platform`');
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invariant(bundleEntry, 'Missing required parameter `bundleEntry`');
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invariant(host, 'Missing required parameter `host`');
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invariant(!hmrClient, 'Cannot initialize hmrClient twice');
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// Moving to top gives errors due to NativeModules not being initialized
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const LoadingView = require('./LoadingView');
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const wsHost = port !== null && port !== '' ? `${host}:${port}` : host;
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const client = new MetroHMRClient(`ws://${wsHost}/hot`);
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hmrClient = client;
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pendingEntryPoints.push(
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`ws://${wsHost}/hot?bundleEntry=${bundleEntry}&platform=${platform}`,
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);
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client.on('connection-error', e => {
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let error = `Cannot connect to the Metro server.
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Try the following to fix the issue:
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- Ensure that the Metro server is running and available on the same network`;
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if (Platform.OS === 'ios') {
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error += `
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- Ensure that the Metro server URL is correctly set in AppDelegate`;
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} else {
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error += `
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- Ensure that your device/emulator is connected to your machine and has USB debugging enabled - run 'adb devices' to see a list of connected devices
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- If you're on a physical device connected to the same machine, run 'adb reverse tcp:8081 tcp:8081' to forward requests from your device
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- If your device is on the same Wi-Fi network, set 'Debug server host & port for device' in 'Dev settings' to your machine's IP address and the port of the local dev server - e.g. 10.0.1.1:8081`;
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}
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error += `
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URL: ${host}:${port}
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Error: ${e.message}`;
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setHMRUnavailableReason(error);
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});
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client.on('update-start', ({isInitialUpdate}) => {
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currentCompileErrorMessage = null;
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didConnect = true;
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if (client.isEnabled() && !isInitialUpdate) {
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LoadingView.showMessage('Refreshing...', 'refresh');
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}
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});
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client.on('update', ({isInitialUpdate}) => {
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if (client.isEnabled() && !isInitialUpdate) {
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dismissRedbox();
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LogBoxData.clear();
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}
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});
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client.on('update-done', () => {
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LoadingView.hide();
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});
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client.on('error', data => {
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LoadingView.hide();
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if (data.type === 'GraphNotFoundError') {
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client.close();
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setHMRUnavailableReason(
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'The Metro server has restarted since the last edit. Reload to reconnect.',
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);
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} else if (data.type === 'RevisionNotFoundError') {
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client.close();
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setHMRUnavailableReason(
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'The Metro server and the client are out of sync. Reload to reconnect.',
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);
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} else {
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currentCompileErrorMessage = `${data.type} ${data.message}`;
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if (client.isEnabled()) {
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showCompileError();
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}
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}
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});
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client.on('close', data => {
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LoadingView.hide();
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setHMRUnavailableReason('Disconnected from the Metro server.');
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});
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if (isEnabled) {
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HMRClient.enable();
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} else {
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HMRClient.disable();
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}
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registerBundleEntryPoints(hmrClient);
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flushEarlyLogs(hmrClient);
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},
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};
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function setHMRUnavailableReason(reason) {
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invariant(hmrClient, 'Expected HMRClient.setup() call at startup.');
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if (hmrUnavailableReason !== null) {
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// Don't show more than one warning.
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return;
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}
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hmrUnavailableReason = reason;
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// We only want to show a warning if Fast Refresh is on *and* if we ever
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// previously managed to connect successfully. We don't want to show
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// the warning to native engineers who use cached bundles without Metro.
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if (hmrClient.isEnabled() && didConnect) {
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console.warn(reason);
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// (Not using the `warning` module to prevent a Buck cycle.)
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}
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}
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function registerBundleEntryPoints(client) {
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if (hmrUnavailableReason) {
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DevSettings.reload('Bundle Splitting – Metro disconnected');
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return;
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}
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if (pendingEntryPoints.length > 0) {
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client.send(
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JSON.stringify({
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type: 'register-entrypoints',
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entryPoints: pendingEntryPoints,
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}),
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);
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pendingEntryPoints.length = 0;
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}
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}
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function flushEarlyLogs(client) {
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try {
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pendingLogs.forEach(([level: LogLevel, data: Array<mixed>]) => {
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HMRClient.log(level, data);
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});
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} finally {
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pendingLogs.length = 0;
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}
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}
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function dismissRedbox() {
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if (
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Platform.OS === 'ios' &&
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NativeRedBox != null &&
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NativeRedBox.dismiss != null
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) {
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NativeRedBox.dismiss();
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} else {
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const NativeExceptionsManager = require('../Core/NativeExceptionsManager')
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.default;
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NativeExceptionsManager &&
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NativeExceptionsManager.dismissRedbox &&
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NativeExceptionsManager.dismissRedbox();
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}
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}
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function showCompileError() {
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if (currentCompileErrorMessage === null) {
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return;
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}
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// Even if there is already a redbox, syntax errors are more important.
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// Otherwise you risk seeing a stale runtime error while a syntax error is more recent.
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dismissRedbox();
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const message = currentCompileErrorMessage;
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currentCompileErrorMessage = null;
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const error: ExtendedError = new Error(message);
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// Symbolicating compile errors is wasted effort
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// because the stack trace is meaningless:
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error.preventSymbolication = true;
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throw error;
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}
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module.exports = HMRClient;
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