mirror of https://github.com/webpack/webpack.git
407 lines
12 KiB
JavaScript
407 lines
12 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
"use strict";
|
|
const Template = require("./Template");
|
|
const ModuleHotAcceptDependency = require("./dependencies/ModuleHotAcceptDependency");
|
|
const ModuleHotDeclineDependency = require("./dependencies/ModuleHotDeclineDependency");
|
|
const RawSource = require("webpack-sources").RawSource;
|
|
const ConstDependency = require("./dependencies/ConstDependency");
|
|
const NullFactory = require("./NullFactory");
|
|
const ParserHelpers = require("./ParserHelpers");
|
|
const createHash = require("./util/createHash");
|
|
const SyncBailHook = require("tapable").SyncBailHook;
|
|
|
|
module.exports = class HotModuleReplacementPlugin {
|
|
constructor(options) {
|
|
this.options = options || {};
|
|
this.multiStep = this.options.multiStep;
|
|
this.fullBuildTimeout = this.options.fullBuildTimeout || 200;
|
|
this.requestTimeout = this.options.requestTimeout || 10000;
|
|
}
|
|
|
|
apply(compiler) {
|
|
const multiStep = this.multiStep;
|
|
const fullBuildTimeout = this.fullBuildTimeout;
|
|
const requestTimeout = this.requestTimeout;
|
|
const hotUpdateChunkFilename =
|
|
compiler.options.output.hotUpdateChunkFilename;
|
|
const hotUpdateMainFilename = compiler.options.output.hotUpdateMainFilename;
|
|
compiler.hooks.additionalPass.tapAsync(
|
|
"HotModuleReplacementPlugin",
|
|
callback => {
|
|
if (multiStep) return setTimeout(callback, fullBuildTimeout);
|
|
return callback();
|
|
}
|
|
);
|
|
compiler.hooks.compilation.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(compilation, { normalModuleFactory }) => {
|
|
const hotUpdateChunkTemplate = compilation.hotUpdateChunkTemplate;
|
|
if (!hotUpdateChunkTemplate) return;
|
|
|
|
compilation.dependencyFactories.set(ConstDependency, new NullFactory());
|
|
compilation.dependencyTemplates.set(
|
|
ConstDependency,
|
|
new ConstDependency.Template()
|
|
);
|
|
|
|
compilation.dependencyFactories.set(
|
|
ModuleHotAcceptDependency,
|
|
normalModuleFactory
|
|
);
|
|
compilation.dependencyTemplates.set(
|
|
ModuleHotAcceptDependency,
|
|
new ModuleHotAcceptDependency.Template()
|
|
);
|
|
|
|
compilation.dependencyFactories.set(
|
|
ModuleHotDeclineDependency,
|
|
normalModuleFactory
|
|
);
|
|
compilation.dependencyTemplates.set(
|
|
ModuleHotDeclineDependency,
|
|
new ModuleHotDeclineDependency.Template()
|
|
);
|
|
|
|
compilation.hooks.record.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(compilation, records) => {
|
|
if (records.hash === compilation.hash) return;
|
|
records.hash = compilation.hash;
|
|
records.moduleHashs = {};
|
|
for (const module of compilation.modules) {
|
|
const identifier = module.identifier();
|
|
const hash = createHash(compilation.outputOptions.hashFunction);
|
|
module.updateHash(hash);
|
|
records.moduleHashs[identifier] = hash.digest("hex");
|
|
}
|
|
records.chunkHashs = {};
|
|
for (const chunk of compilation.chunks) {
|
|
records.chunkHashs[chunk.id] = chunk.hash;
|
|
}
|
|
records.chunkModuleIds = {};
|
|
for (const chunk of compilation.chunks) {
|
|
records.chunkModuleIds[chunk.id] = Array.from(
|
|
chunk.modulesIterable,
|
|
m => m.id
|
|
);
|
|
}
|
|
}
|
|
);
|
|
let initialPass = false;
|
|
let recompilation = false;
|
|
compilation.hooks.afterHash.tap("HotModuleReplacementPlugin", () => {
|
|
let records = compilation.records;
|
|
if (!records) {
|
|
initialPass = true;
|
|
return;
|
|
}
|
|
if (!records.hash) initialPass = true;
|
|
const preHash = records.preHash || "x";
|
|
const prepreHash = records.prepreHash || "x";
|
|
if (preHash === compilation.hash) {
|
|
recompilation = true;
|
|
compilation.modifyHash(prepreHash);
|
|
return;
|
|
}
|
|
records.prepreHash = records.hash || "x";
|
|
records.preHash = compilation.hash;
|
|
compilation.modifyHash(records.prepreHash);
|
|
});
|
|
compilation.hooks.shouldGenerateChunkAssets.tap(
|
|
"HotModuleReplacementPlugin",
|
|
() => {
|
|
if (multiStep && !recompilation && !initialPass) return false;
|
|
}
|
|
);
|
|
compilation.hooks.needAdditionalPass.tap(
|
|
"HotModuleReplacementPlugin",
|
|
() => {
|
|
if (multiStep && !recompilation && !initialPass) return true;
|
|
}
|
|
);
|
|
compilation.hooks.additionalChunkAssets.tap(
|
|
"HotModuleReplacementPlugin",
|
|
() => {
|
|
const records = compilation.records;
|
|
if (records.hash === compilation.hash) return;
|
|
if (
|
|
!records.moduleHashs ||
|
|
!records.chunkHashs ||
|
|
!records.chunkModuleIds
|
|
)
|
|
return;
|
|
for (const module of compilation.modules) {
|
|
const identifier = module.identifier();
|
|
let hash = createHash(compilation.outputOptions.hashFunction);
|
|
module.updateHash(hash);
|
|
hash = hash.digest("hex");
|
|
module.hotUpdate = records.moduleHashs[identifier] !== hash;
|
|
}
|
|
const hotUpdateMainContent = {
|
|
h: compilation.hash,
|
|
c: {}
|
|
};
|
|
for (let chunkId of Object.keys(records.chunkHashs)) {
|
|
chunkId = isNaN(+chunkId) ? chunkId : +chunkId;
|
|
const currentChunk = compilation.chunks.find(
|
|
chunk => chunk.id === chunkId
|
|
);
|
|
if (currentChunk) {
|
|
const newModules = currentChunk
|
|
.getModules()
|
|
.filter(module => module.hotUpdate);
|
|
const allModules = new Set();
|
|
for (const module of currentChunk.modulesIterable) {
|
|
allModules.add(module.id);
|
|
}
|
|
const removedModules = records.chunkModuleIds[chunkId].filter(
|
|
id => !allModules.has(id)
|
|
);
|
|
if (newModules.length > 0 || removedModules.length > 0) {
|
|
const source = hotUpdateChunkTemplate.render(
|
|
chunkId,
|
|
newModules,
|
|
removedModules,
|
|
compilation.hash,
|
|
compilation.moduleTemplates.javascript,
|
|
compilation.dependencyTemplates
|
|
);
|
|
const filename = compilation.getPath(hotUpdateChunkFilename, {
|
|
hash: records.hash,
|
|
chunk: currentChunk
|
|
});
|
|
compilation.additionalChunkAssets.push(filename);
|
|
compilation.assets[filename] = source;
|
|
hotUpdateMainContent.c[chunkId] = true;
|
|
currentChunk.files.push(filename);
|
|
compilation.hooks.chunkAsset.call(
|
|
"HotModuleReplacementPlugin",
|
|
currentChunk,
|
|
filename
|
|
);
|
|
}
|
|
} else {
|
|
hotUpdateMainContent.c[chunkId] = false;
|
|
}
|
|
}
|
|
const source = new RawSource(JSON.stringify(hotUpdateMainContent));
|
|
const filename = compilation.getPath(hotUpdateMainFilename, {
|
|
hash: records.hash
|
|
});
|
|
compilation.assets[filename] = source;
|
|
}
|
|
);
|
|
|
|
const mainTemplate = compilation.mainTemplate;
|
|
|
|
mainTemplate.hooks.hash.tap("HotModuleReplacementPlugin", hash => {
|
|
hash.update("HotMainTemplateDecorator");
|
|
});
|
|
|
|
mainTemplate.hooks.moduleRequire.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(_, chunk, hash, varModuleId) => {
|
|
return `hotCreateRequire(${varModuleId})`;
|
|
}
|
|
);
|
|
|
|
mainTemplate.hooks.requireExtensions.tap(
|
|
"HotModuleReplacementPlugin",
|
|
source => {
|
|
const buf = [source];
|
|
buf.push("");
|
|
buf.push("// __webpack_hash__");
|
|
buf.push(
|
|
mainTemplate.requireFn +
|
|
".h = function() { return hotCurrentHash; };"
|
|
);
|
|
return Template.asString(buf);
|
|
}
|
|
);
|
|
|
|
const needChunkLoadingCode = chunk => {
|
|
for (const chunkGroup of chunk.groupsIterable) {
|
|
if (chunkGroup.chunks.length > 1) return true;
|
|
if (chunkGroup.getNumberOfChildren() > 0) return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
mainTemplate.hooks.bootstrap.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(source, chunk, hash) => {
|
|
source = mainTemplate.hooks.hotBootstrap.call(source, chunk, hash);
|
|
return Template.asString([
|
|
source,
|
|
"",
|
|
hotInitCode
|
|
.replace(/\$require\$/g, mainTemplate.requireFn)
|
|
.replace(/\$hash\$/g, JSON.stringify(hash))
|
|
.replace(/\$requestTimeout\$/g, requestTimeout)
|
|
.replace(
|
|
/\/\*foreachInstalledChunks\*\//g,
|
|
needChunkLoadingCode(chunk)
|
|
? "for(var chunkId in installedChunks)"
|
|
: `var chunkId = ${JSON.stringify(chunk.id)};`
|
|
)
|
|
]);
|
|
}
|
|
);
|
|
|
|
mainTemplate.hooks.globalHash.tap(
|
|
"HotModuleReplacementPlugin",
|
|
() => true
|
|
);
|
|
|
|
mainTemplate.hooks.currentHash.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(_, length) => {
|
|
if (isFinite(length)) return `hotCurrentHash.substr(0, ${length})`;
|
|
else return "hotCurrentHash";
|
|
}
|
|
);
|
|
|
|
mainTemplate.hooks.moduleObj.tap(
|
|
"HotModuleReplacementPlugin",
|
|
(source, chunk, hash, varModuleId) => {
|
|
return Template.asString([
|
|
`${source},`,
|
|
`hot: hotCreateModule(${varModuleId}),`,
|
|
"parents: (hotCurrentParentsTemp = hotCurrentParents, hotCurrentParents = [], hotCurrentParentsTemp),",
|
|
"children: []"
|
|
]);
|
|
}
|
|
);
|
|
|
|
const handler = (parser, parserOptions) => {
|
|
parser.hooks.expression
|
|
.for("__webpack_hash__")
|
|
.tap(
|
|
"HotModuleReplacementPlugin",
|
|
ParserHelpers.toConstantDependencyWithWebpackRequire(
|
|
parser,
|
|
"__webpack_require__.h()"
|
|
)
|
|
);
|
|
parser.hooks.evaluateTypeof
|
|
.for("__webpack_hash__")
|
|
.tap(
|
|
"HotModuleReplacementPlugin",
|
|
ParserHelpers.evaluateToString("string")
|
|
);
|
|
parser.hooks.evaluateIdentifier.for("module.hot").tap(
|
|
{
|
|
name: "HotModuleReplacementPlugin",
|
|
before: "NodeStuffPlugin"
|
|
},
|
|
expr => {
|
|
return ParserHelpers.evaluateToIdentifier(
|
|
"module.hot",
|
|
!!parser.state.compilation.hotUpdateChunkTemplate
|
|
)(expr);
|
|
}
|
|
);
|
|
// TODO webpack 5: refactor this, no custom hooks
|
|
if (!parser.hooks.hotAcceptCallback)
|
|
parser.hooks.hotAcceptCallback = new SyncBailHook([
|
|
"expression",
|
|
"requests"
|
|
]);
|
|
if (!parser.hooks.hotAcceptWithoutCallback)
|
|
parser.hooks.hotAcceptWithoutCallback = new SyncBailHook([
|
|
"expression",
|
|
"requests"
|
|
]);
|
|
parser.hooks.call
|
|
.for("module.hot.accept")
|
|
.tap("HotModuleReplacementPlugin", expr => {
|
|
if (!parser.state.compilation.hotUpdateChunkTemplate)
|
|
return false;
|
|
if (expr.arguments.length >= 1) {
|
|
const arg = parser.evaluateExpression(expr.arguments[0]);
|
|
let params = [];
|
|
let requests = [];
|
|
if (arg.isString()) {
|
|
params = [arg];
|
|
} else if (arg.isArray()) {
|
|
params = arg.items.filter(param => param.isString());
|
|
}
|
|
if (params.length > 0) {
|
|
params.forEach((param, idx) => {
|
|
const request = param.string;
|
|
const dep = new ModuleHotAcceptDependency(
|
|
request,
|
|
param.range
|
|
);
|
|
dep.optional = true;
|
|
dep.loc = Object.create(expr.loc);
|
|
dep.loc.index = idx;
|
|
parser.state.module.addDependency(dep);
|
|
requests.push(request);
|
|
});
|
|
if (expr.arguments.length > 1)
|
|
parser.hooks.hotAcceptCallback.call(
|
|
expr.arguments[1],
|
|
requests
|
|
);
|
|
else
|
|
parser.hooks.hotAcceptWithoutCallback.call(expr, requests);
|
|
}
|
|
}
|
|
});
|
|
parser.hooks.call
|
|
.for("module.hot.decline")
|
|
.tap("HotModuleReplacementPlugin", expr => {
|
|
if (!parser.state.compilation.hotUpdateChunkTemplate)
|
|
return false;
|
|
if (expr.arguments.length === 1) {
|
|
const arg = parser.evaluateExpression(expr.arguments[0]);
|
|
let params = [];
|
|
if (arg.isString()) {
|
|
params = [arg];
|
|
} else if (arg.isArray()) {
|
|
params = arg.items.filter(param => param.isString());
|
|
}
|
|
params.forEach((param, idx) => {
|
|
const dep = new ModuleHotDeclineDependency(
|
|
param.string,
|
|
param.range
|
|
);
|
|
dep.optional = true;
|
|
dep.loc = Object.create(expr.loc);
|
|
dep.loc.index = idx;
|
|
parser.state.module.addDependency(dep);
|
|
});
|
|
}
|
|
});
|
|
parser.hooks.expression
|
|
.for("module.hot")
|
|
.tap("HotModuleReplacementPlugin", ParserHelpers.skipTraversal);
|
|
};
|
|
|
|
// TODO add HMR support for javascript/esm
|
|
normalModuleFactory.hooks.parser
|
|
.for("javascript/auto")
|
|
.tap("HotModuleReplacementPlugin", handler);
|
|
normalModuleFactory.hooks.parser
|
|
.for("javascript/dynamic")
|
|
.tap("HotModuleReplacementPlugin", handler);
|
|
|
|
compilation.hooks.normalModuleLoader.tap(
|
|
"HotModuleReplacementPlugin",
|
|
context => {
|
|
context.hot = true;
|
|
}
|
|
);
|
|
}
|
|
);
|
|
}
|
|
};
|
|
|
|
const hotInitCode = Template.getFunctionContent(
|
|
require("./HotModuleReplacement.runtime.js")
|
|
);
|