mirror of https://github.com/webpack/webpack.git
265 lines
11 KiB
JavaScript
265 lines
11 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 Template = require("./Template");
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const ModuleHotAcceptDependency = require("./dependencies/ModuleHotAcceptDependency");
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const ModuleHotDeclineDependency = require("./dependencies/ModuleHotDeclineDependency");
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const RawSource = require("webpack-sources").RawSource;
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const ConstDependency = require("./dependencies/ConstDependency");
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const NullFactory = require("./NullFactory");
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const ParserHelpers = require("./ParserHelpers");
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const createHash = require("./util/createHash");
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const SyncBailHook = require("tapable").SyncBailHook;
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module.exports = class HotModuleReplacementPlugin {
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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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this.requestTimeout = this.options.requestTimeout || 10000;
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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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const requestTimeout = this.requestTimeout;
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const hotUpdateChunkFilename = compiler.options.output.hotUpdateChunkFilename;
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const hotUpdateMainFilename = compiler.options.output.hotUpdateMainFilename;
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compiler.hooks.additionalPass.tapAsync("HotModuleReplacementPlugin", (callback) => {
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if(multiStep)
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return setTimeout(callback, fullBuildTimeout);
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return callback();
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});
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compiler.hooks.compilation.tap("HotModuleReplacementPlugin", (compilation, {
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normalModuleFactory
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}) => {
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const hotUpdateChunkTemplate = compilation.hotUpdateChunkTemplate;
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if(!hotUpdateChunkTemplate) return;
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compilation.dependencyFactories.set(ConstDependency, new NullFactory());
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compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
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compilation.dependencyFactories.set(ModuleHotAcceptDependency, normalModuleFactory);
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compilation.dependencyTemplates.set(ModuleHotAcceptDependency, new ModuleHotAcceptDependency.Template());
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compilation.dependencyFactories.set(ModuleHotDeclineDependency, normalModuleFactory);
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compilation.dependencyTemplates.set(ModuleHotDeclineDependency, new ModuleHotDeclineDependency.Template());
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compilation.hooks.record.tap("HotModuleReplacementPlugin", (compilation, records) => {
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if(records.hash === compilation.hash) return;
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records.hash = compilation.hash;
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records.moduleHashs = {};
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compilation.modules.forEach(module => {
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const identifier = module.identifier();
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const hash = createHash(compilation.outputOptions.hashFunction);
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module.updateHash(hash);
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records.moduleHashs[identifier] = hash.digest("hex");
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});
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records.chunkHashs = {};
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compilation.chunks.forEach(chunk => {
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records.chunkHashs[chunk.id] = chunk.hash;
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});
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records.chunkModuleIds = {};
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compilation.chunks.forEach(chunk => {
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records.chunkModuleIds[chunk.id] = chunk.mapModules(m => m.id);
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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)
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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("HotModuleReplacementPlugin", () => {
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if(multiStep && !recompilation && !initialPass)
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return false;
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});
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compilation.hooks.needAdditionalPass.tap("HotModuleReplacementPlugin", () => {
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if(multiStep && !recompilation && !initialPass)
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return true;
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});
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compilation.hooks.additionalChunkAssets.tap("HotModuleReplacementPlugin", () => {
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const records = compilation.records;
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if(records.hash === compilation.hash) return;
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if(!records.moduleHashs || !records.chunkHashs || !records.chunkModuleIds) return;
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compilation.modules.forEach(module => {
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const identifier = module.identifier();
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let hash = createHash(compilation.outputOptions.hashFunction);
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module.updateHash(hash);
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hash = hash.digest("hex");
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module.hotUpdate = records.moduleHashs[identifier] !== hash;
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});
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const hotUpdateMainContent = {
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h: compilation.hash,
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c: {},
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};
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Object.keys(records.chunkHashs).forEach(chunkId => {
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chunkId = isNaN(+chunkId) ? chunkId : +chunkId;
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const currentChunk = compilation.chunks.find(chunk => chunk.id === chunkId);
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if(currentChunk) {
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const newModules = currentChunk.getModules().filter(module => module.hotUpdate);
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const allModules = {};
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currentChunk.forEachModule(module => {
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allModules[module.id] = true;
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});
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const removedModules = records.chunkModuleIds[chunkId].filter(id => !allModules[id]);
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if(newModules.length > 0 || removedModules.length > 0) {
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const source = hotUpdateChunkTemplate.render(chunkId, newModules, removedModules, compilation.hash, compilation.moduleTemplates.javascript, compilation.dependencyTemplates);
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const filename = compilation.getPath(hotUpdateChunkFilename, {
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hash: records.hash,
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chunk: currentChunk
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});
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compilation.additionalChunkAssets.push(filename);
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compilation.assets[filename] = source;
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hotUpdateMainContent.c[chunkId] = true;
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currentChunk.files.push(filename);
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compilation.applyPlugins("chunk-asset", currentChunk, filename);
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}
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} else {
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hotUpdateMainContent.c[chunkId] = false;
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}
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}, compilation);
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const source = new RawSource(JSON.stringify(hotUpdateMainContent));
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const filename = compilation.getPath(hotUpdateMainFilename, {
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hash: records.hash
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});
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compilation.assets[filename] = source;
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});
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const mainTemplate = compilation.mainTemplate;
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mainTemplate.hooks.hash.tap("HotModuleReplacementPlugin", hash => {
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hash.update("HotMainTemplateDecorator");
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});
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mainTemplate.hooks.moduleRequire.tap("HotModuleReplacementPlugin", (_, chunk, hash, varModuleId) => {
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return `hotCreateRequire(${varModuleId})`;
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});
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mainTemplate.hooks.requireExtensions.tap("HotModuleReplacementPlugin", source => {
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const buf = [source];
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buf.push("");
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buf.push("// __webpack_hash__");
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buf.push(mainTemplate.requireFn + ".h = function() { return hotCurrentHash; };");
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return Template.asString(buf);
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});
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mainTemplate.hooks.bootstrap.tap("HotModuleReplacementPlugin", (source, chunk, hash) => {
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source = mainTemplate.hooks.hotBootstrap.call(source, chunk, hash);
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return Template.asString([
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source,
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"",
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hotInitCode
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.replace(/\$require\$/g, mainTemplate.requireFn)
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.replace(/\$hash\$/g, JSON.stringify(hash))
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.replace(/\$requestTimeout\$/g, requestTimeout)
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.replace(/\/\*foreachInstalledChunks\*\//g, chunk.getNumberOfChunks() > 0 ? "for(var chunkId in installedChunks)" : `var chunkId = ${JSON.stringify(chunk.id)};`)
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]);
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});
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mainTemplate.hooks.globalHash.tap("HotModuleReplacementPlugin", () => true);
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mainTemplate.hooks.currentHash.tap("HotModuleReplacementPlugin", (_, length) => {
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if(isFinite(length))
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return `hotCurrentHash.substr(0, ${length})`;
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else
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return "hotCurrentHash";
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});
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mainTemplate.hooks.moduleObj.tap("HotModuleReplacementPlugin", (source, chunk, hash, varModuleId) => {
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return Template.asString([
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`${source},`,
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`hot: hotCreateModule(${varModuleId}),`,
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"parents: (hotCurrentParentsTemp = hotCurrentParents, hotCurrentParents = [], hotCurrentParentsTemp),",
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"children: []"
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]);
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});
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const handler = (parser, parserOptions) => {
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parser.hooks.expression.for("__webpack_hash__").tap("HotModuleReplacementPlugin", ParserHelpers.toConstantDependencyWithWebpackRequire(parser, "__webpack_require__.h()"));
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parser.hooks.evaluateTypeof.for("__webpack_hash__").tap("HotModuleReplacementPlugin", ParserHelpers.evaluateToString("string"));
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parser.hooks.evaluateIdentifier.for("module.hot").tap("HotModuleReplacementPlugin", expr => {
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return ParserHelpers.evaluateToIdentifier("module.hot", !!parser.state.compilation.hotUpdateChunkTemplate)(expr);
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});
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// TODO webpack 5: refactor this, no custom hooks
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if(!parser.hooks.hotAcceptCallback)
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parser.hooks.hotAcceptCallback = new SyncBailHook(["expression", "requests"]);
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if(!parser.hooks.hotAcceptWithoutCallback)
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parser.hooks.hotAcceptWithoutCallback = new SyncBailHook(["expression", "requests"]);
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parser.hooks.call.for("module.hot.accept").tap("HotModuleReplacementPlugin", expr => {
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if(!parser.state.compilation.hotUpdateChunkTemplate) return false;
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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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parser.hooks.hotAcceptCallback.call(expr.arguments[1], requests);
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else
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parser.hooks.hotAcceptWithoutCallback.call(expr, requests);
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}
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}
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});
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parser.hooks.call.for("module.hot.decline").tap("HotModuleReplacementPlugin", expr => {
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if(!parser.state.compilation.hotUpdateChunkTemplate) return false;
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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(param.string, 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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});
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}
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});
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parser.hooks.expression.for("module.hot").tap("HotModuleReplacementPlugin", ParserHelpers.skipTraversal);
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};
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// TODO add HMR support for javascript/esm
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normalModuleFactory.hooks.parser.for("javascript/auto").tap("HotModuleReplacementPlugin", handler);
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normalModuleFactory.hooks.parser.for("javascript/dynamic").tap("HotModuleReplacementPlugin", handler);
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});
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}
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};
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const hotInitCode = Template.getFunctionContent(require("./HotModuleReplacement.runtime.js"));
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