mirror of https://github.com/webpack/webpack.git
450 lines
14 KiB
JavaScript
450 lines
14 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { SyncBailHook } = require("tapable");
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const { RawSource } = require("webpack-sources");
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const ChunkGraph = require("./ChunkGraph");
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const Compilation = require("./Compilation");
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const HotUpdateChunk = require("./HotUpdateChunk");
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const NormalModule = require("./NormalModule");
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const RuntimeGlobals = require("./RuntimeGlobals");
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const ModuleHotAcceptDependency = require("./dependencies/ModuleHotAcceptDependency");
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const ModuleHotDeclineDependency = require("./dependencies/ModuleHotDeclineDependency");
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const ModuleHotDependency = require("./dependencies/ModuleHotDependency");
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const HotModuleReplacementRuntimeModule = require("./hmr/HotModuleReplacementRuntimeModule");
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const JavascriptParser = require("./javascript/JavascriptParser");
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const {
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evaluateToIdentifier,
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evaluateToString,
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toConstantDependency
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} = require("./javascript/JavascriptParserHelpers");
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const { find } = require("./util/SetHelpers");
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const { compareModulesById } = require("./util/comparators");
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/** @typedef {import("./Chunk")} Chunk */
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/** @typedef {import("./Compiler")} Compiler */
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/** @typedef {import("./Module")} Module */
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/**
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* @typedef {Object} HMRJavascriptParserHooks
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* @property {SyncBailHook<[TODO, string[]], void>} hotAcceptCallback
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* @property {SyncBailHook<[TODO, string[]], void>} hotAcceptWithoutCallback
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*/
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/** @type {WeakMap<JavascriptParser, HMRJavascriptParserHooks>} */
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const parserHooksMap = new WeakMap();
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class HotModuleReplacementPlugin {
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/**
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* @param {JavascriptParser} parser the parser
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* @returns {HMRJavascriptParserHooks} the attached hooks
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*/
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static getParserHooks(parser) {
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if (!(parser instanceof JavascriptParser)) {
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throw new TypeError(
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"The 'parser' argument must be an instance of JavascriptParser"
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);
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}
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let hooks = parserHooksMap.get(parser);
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if (hooks === undefined) {
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hooks = {
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hotAcceptCallback: new SyncBailHook(["expression", "requests"]),
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hotAcceptWithoutCallback: new SyncBailHook(["expression", "requests"])
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};
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parserHooksMap.set(parser, hooks);
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}
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return hooks;
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}
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constructor(options) {
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this.options = options || {};
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this.multiStep = this.options.multiStep;
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this.fullBuildTimeout = this.options.fullBuildTimeout || 200;
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}
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/**
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* Apply the plugin
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* @param {Compiler} compiler the compiler instance
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* @returns {void}
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*/
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apply(compiler) {
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const multiStep = this.multiStep;
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const fullBuildTimeout = this.fullBuildTimeout;
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compiler.hooks.additionalPass.tapAsync(
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"HotModuleReplacementPlugin",
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callback => {
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if (multiStep) return setTimeout(callback, fullBuildTimeout);
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return callback();
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}
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);
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const addParserPlugins = (parser, parserOptions) => {
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const {
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hotAcceptCallback,
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hotAcceptWithoutCallback
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} = HotModuleReplacementPlugin.getParserHooks(parser);
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parser.hooks.expression
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.for("__webpack_hash__")
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.tap(
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"HotModuleReplacementPlugin",
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toConstantDependency(parser, `${RuntimeGlobals.getFullHash}()`, [
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RuntimeGlobals.getFullHash
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])
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);
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parser.hooks.evaluateTypeof
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.for("__webpack_hash__")
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.tap("HotModuleReplacementPlugin", evaluateToString("string"));
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parser.hooks.evaluateIdentifier.for("module.hot").tap(
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{
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name: "HotModuleReplacementPlugin",
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before: "NodeStuffPlugin"
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},
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expr => {
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return evaluateToIdentifier(
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"module.hot",
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"module",
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() => ["hot"],
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true
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)(expr);
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}
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);
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parser.hooks.call
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.for("module.hot.accept")
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.tap("HotModuleReplacementPlugin", expr => {
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const dep = new ModuleHotDependency(expr.callee.range, "accept");
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dep.loc = expr.loc;
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parser.state.module.addDependency(dep);
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if (expr.arguments.length >= 1) {
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const arg = parser.evaluateExpression(expr.arguments[0]);
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let params = [];
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let requests = [];
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if (arg.isString()) {
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params = [arg];
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} else if (arg.isArray()) {
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params = arg.items.filter(param => param.isString());
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}
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if (params.length > 0) {
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params.forEach((param, idx) => {
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const request = param.string;
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const dep = new ModuleHotAcceptDependency(request, param.range);
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dep.optional = true;
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dep.loc = Object.create(expr.loc);
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dep.loc.index = idx;
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parser.state.module.addDependency(dep);
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requests.push(request);
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});
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if (expr.arguments.length > 1) {
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hotAcceptCallback.call(expr.arguments[1], requests);
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parser.walkExpression(expr.arguments[1]); // other args are ignored
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return true;
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} else {
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hotAcceptWithoutCallback.call(expr, requests);
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return true;
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}
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}
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}
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return true;
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});
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parser.hooks.call
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.for("module.hot.decline")
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.tap("HotModuleReplacementPlugin", expr => {
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const dep = new ModuleHotDependency(expr.callee.range, "decline");
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dep.loc = expr.loc;
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parser.state.module.addDependency(dep);
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if (expr.arguments.length === 1) {
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const arg = parser.evaluateExpression(expr.arguments[0]);
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let params = [];
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if (arg.isString()) {
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params = [arg];
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} else if (arg.isArray()) {
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params = arg.items.filter(param => param.isString());
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}
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params.forEach((param, idx) => {
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const dep = new ModuleHotDeclineDependency(
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param.string,
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param.range
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);
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dep.optional = true;
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dep.loc = Object.create(expr.loc);
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dep.loc.index = idx;
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parser.state.module.addDependency(dep);
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});
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}
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return true;
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});
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parser.hooks.expression
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.for("module.hot")
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.tap("HotModuleReplacementPlugin", expr => {
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const dep = new ModuleHotDependency(expr.range);
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dep.loc = expr.loc;
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parser.state.module.addDependency(dep);
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return true;
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});
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};
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compiler.hooks.compilation.tap(
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"HotModuleReplacementPlugin",
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(compilation, { normalModuleFactory }) => {
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// This applies the HMR plugin only to the targeted compiler
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// It should not affect child compilations
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if (compilation.compiler !== compiler) return;
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compilation.dependencyFactories.set(
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ModuleHotAcceptDependency,
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normalModuleFactory
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);
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compilation.dependencyTemplates.set(
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ModuleHotAcceptDependency,
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new ModuleHotAcceptDependency.Template()
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);
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compilation.dependencyFactories.set(
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ModuleHotDeclineDependency,
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normalModuleFactory
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);
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compilation.dependencyTemplates.set(
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ModuleHotDeclineDependency,
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new ModuleHotDeclineDependency.Template()
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);
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compilation.dependencyTemplates.set(
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ModuleHotDependency,
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new ModuleHotDependency.Template()
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);
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compilation.hooks.record.tap(
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"HotModuleReplacementPlugin",
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(compilation, records) => {
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if (records.hash === compilation.hash) return;
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const chunkGraph = compilation.chunkGraph;
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records.hash = compilation.hash;
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records.moduleHashs = {};
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for (const module of compilation.modules) {
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const identifier = module.identifier();
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records.moduleHashs[identifier] = chunkGraph.getModuleHash(
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module
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);
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}
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records.chunkHashs = {};
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for (const chunk of compilation.chunks) {
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records.chunkHashs[chunk.id] = chunk.hash;
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}
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records.chunkModuleIds = {};
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for (const chunk of compilation.chunks) {
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records.chunkModuleIds[
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chunk.id
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] = Array.from(
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chunkGraph.getOrderedChunkModulesIterable(
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chunk,
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compareModulesById(chunkGraph)
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),
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m => chunkGraph.getModuleId(m)
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);
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}
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}
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);
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let initialPass = false;
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let recompilation = false;
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compilation.hooks.afterHash.tap("HotModuleReplacementPlugin", () => {
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let records = compilation.records;
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if (!records) {
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initialPass = true;
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return;
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}
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if (!records.hash) initialPass = true;
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const preHash = records.preHash || "x";
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const prePreHash = records.prePreHash || "x";
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if (preHash === compilation.hash) {
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recompilation = true;
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compilation.modifyHash(prePreHash);
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return;
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}
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records.prePreHash = records.hash || "x";
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records.preHash = compilation.hash;
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compilation.modifyHash(records.prePreHash);
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});
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compilation.hooks.shouldGenerateChunkAssets.tap(
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"HotModuleReplacementPlugin",
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() => {
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if (multiStep && !recompilation && !initialPass) return false;
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}
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);
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compilation.hooks.needAdditionalPass.tap(
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"HotModuleReplacementPlugin",
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() => {
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if (multiStep && !recompilation && !initialPass) return true;
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}
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);
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compilation.hooks.processAssets.tap(
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{
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name: "HotModuleReplacementPlugin",
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stage: Compilation.PROCESS_ASSETS_STAGE_ADDITIONAL
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},
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() => {
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const chunkGraph = compilation.chunkGraph;
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const records = compilation.records;
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if (records.hash === compilation.hash) return;
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if (
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!records.moduleHashs ||
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!records.chunkHashs ||
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!records.chunkModuleIds
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)
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return;
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/** @type {Set<Module>} */
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const updatedModules = new Set();
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for (const module of compilation.modules) {
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const identifier = module.identifier();
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const hash = chunkGraph.getModuleHash(module);
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if (records.moduleHashs[identifier] !== hash) {
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updatedModules.add(module);
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}
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}
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const hotUpdateMainContent = {
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c: [],
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r: [],
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m: undefined
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};
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const allRemovedModules = new Set();
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for (const key of Object.keys(records.chunkHashs)) {
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const currentChunk = find(
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compilation.chunks,
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chunk => `${chunk.id}` === key
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);
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if (currentChunk) {
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const chunkId = currentChunk.id;
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const newModules = chunkGraph
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.getChunkModules(currentChunk)
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.filter(module => updatedModules.has(module));
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const newRuntimeModules = Array.from(
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chunkGraph.getChunkRuntimeModulesIterable(currentChunk)
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).filter(module => updatedModules.has(module));
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const fullHashModules = chunkGraph.getChunkFullHashModulesIterable(
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currentChunk
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);
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const newFullHashModules =
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fullHashModules &&
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Array.from(fullHashModules).filter(module =>
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updatedModules.has(module)
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);
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/** @type {Set<number|string>} */
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const allModules = new Set();
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for (const module of chunkGraph.getChunkModulesIterable(
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currentChunk
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)) {
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allModules.add(chunkGraph.getModuleId(module));
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}
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const removedModules = records.chunkModuleIds[chunkId].filter(
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id => !allModules.has(id)
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);
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if (newModules.length > 0 || removedModules.length > 0) {
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const hotUpdateChunk = new HotUpdateChunk();
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ChunkGraph.setChunkGraphForChunk(hotUpdateChunk, chunkGraph);
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hotUpdateChunk.id = chunkId;
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chunkGraph.attachModules(hotUpdateChunk, newModules);
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chunkGraph.attachRuntimeModules(
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hotUpdateChunk,
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newRuntimeModules
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);
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if (newFullHashModules) {
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chunkGraph.attachFullHashModules(
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hotUpdateChunk,
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newRuntimeModules
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);
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}
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hotUpdateChunk.removedModules = removedModules;
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const renderManifest = compilation.getRenderManifest({
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chunk: hotUpdateChunk,
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hash: records.hash,
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fullHash: records.hash,
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outputOptions: compilation.outputOptions,
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moduleTemplates: compilation.moduleTemplates,
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dependencyTemplates: compilation.dependencyTemplates,
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codeGenerationResults: compilation.codeGenerationResults,
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runtimeTemplate: compilation.runtimeTemplate,
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moduleGraph: compilation.moduleGraph,
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chunkGraph
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});
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for (const entry of renderManifest) {
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const {
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path: filename,
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info: assetInfo
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} = compilation.getPathWithInfo(
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entry.filenameTemplate,
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entry.pathOptions
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);
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const source = entry.render();
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compilation.additionalChunkAssets.push(filename);
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compilation.emitAsset(filename, source, {
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hotModuleReplacement: true,
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...assetInfo
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});
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currentChunk.files.add(filename);
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compilation.hooks.chunkAsset.call(currentChunk, filename);
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}
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hotUpdateMainContent.c.push(chunkId);
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}
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} else {
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const chunkId = `${+key}` === key ? +key : key;
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hotUpdateMainContent.r.push(chunkId);
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for (const id of records.chunkModuleIds[chunkId])
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allRemovedModules.add(id);
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}
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}
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hotUpdateMainContent.m = Array.from(allRemovedModules);
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const source = new RawSource(JSON.stringify(hotUpdateMainContent));
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const {
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path: filename,
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info: assetInfo
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} = compilation.getPathWithInfo(
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compilation.outputOptions.hotUpdateMainFilename,
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{
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hash: records.hash
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}
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);
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compilation.emitAsset(filename, source, {
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hotModuleReplacement: true,
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...assetInfo
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});
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}
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);
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compilation.hooks.additionalTreeRuntimeRequirements.tap(
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"HotModuleReplacementPlugin",
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(chunk, runtimeRequirements) => {
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runtimeRequirements.add(RuntimeGlobals.hmrDownloadManifest);
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runtimeRequirements.add(RuntimeGlobals.hmrDownloadUpdateHandlers);
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runtimeRequirements.add(RuntimeGlobals.interceptModuleExecution);
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runtimeRequirements.add(RuntimeGlobals.moduleCache);
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compilation.addRuntimeModule(
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chunk,
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new HotModuleReplacementRuntimeModule()
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);
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}
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);
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// TODO add HMR support for javascript/esm
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("HotModuleReplacementPlugin", addParserPlugins);
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normalModuleFactory.hooks.parser
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.for("javascript/dynamic")
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.tap("HotModuleReplacementPlugin", addParserPlugins);
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NormalModule.getCompilationHooks(compilation).loader.tap(
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"HotModuleReplacementPlugin",
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context => {
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context.hot = true;
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}
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);
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}
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);
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}
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}
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module.exports = HotModuleReplacementPlugin;
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