388 lines
13 KiB
JavaScript
388 lines
13 KiB
JavaScript
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"use strict";
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const path = require("path");
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const {
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findModuleById,
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evalModuleCode,
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AUTO_PUBLIC_PATH,
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ABSOLUTE_PUBLIC_PATH,
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BASE_URI,
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SINGLE_DOT_PATH_SEGMENT,
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stringifyRequest,
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stringifyLocal
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} = require("./utils");
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const schema = require("./loader-options.json");
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const MiniCssExtractPlugin = require("./index");
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/** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
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/** @typedef {import("webpack").Compiler} Compiler */
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/** @typedef {import("webpack").Compilation} Compilation */
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/** @typedef {import("webpack").Chunk} Chunk */
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/** @typedef {import("webpack").Module} Module */
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/** @typedef {import("webpack").sources.Source} Source */
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/** @typedef {import("webpack").AssetInfo} AssetInfo */
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/** @typedef {import("webpack").NormalModule} NormalModule */
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/** @typedef {import("./index.js").LoaderOptions} LoaderOptions */
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/** @typedef {{ [key: string]: string | function }} Locals */
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/** @typedef {any} TODO */
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/**
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* @typedef {Object} Dependency
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* @property {string} identifier
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* @property {string | null} context
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* @property {Buffer} content
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* @property {string} media
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* @property {string} [supports]
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* @property {string} [layer]
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* @property {Buffer} [sourceMap]
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*/
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/**
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* @param {string} content
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* @param {{ loaderContext: import("webpack").LoaderContext<LoaderOptions>, options: LoaderOptions, locals: Locals | undefined }} context
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* @returns {string}
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*/
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function hotLoader(content, context) {
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const accept = context.locals ? "" : "module.hot.accept(undefined, cssReload);";
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return `${content}
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if(module.hot) {
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// ${Date.now()}
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var cssReload = require(${stringifyRequest(context.loaderContext, path.join(__dirname, "hmr/hotModuleReplacement.js"))})(module.id, ${JSON.stringify({
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...context.options,
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locals: !!context.locals
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})});
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module.hot.dispose(cssReload);
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${accept}
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}
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`;
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}
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/**
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* @this {import("webpack").LoaderContext<LoaderOptions>}
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* @param {string} request
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*/
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function pitch(request) {
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if (this._compiler && this._compiler.options && this._compiler.options.experiments && this._compiler.options.experiments.css && this._module && this._module.type === "css") {
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this.emitWarning(new Error('You can\'t use `experiments.css` (`experiments.futureDefaults` enable built-in CSS support by default) and `mini-css-extract-plugin` together, please set `experiments.css` to `false` or set `{ type: "javascript/auto" }` for rules with `mini-css-extract-plugin` in your webpack config (now `mini-css-extract-plugin` does nothing).'));
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return;
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}
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// @ts-ignore
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const options = this.getOptions( /** @type {Schema} */schema);
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const emit = typeof options.emit !== "undefined" ? options.emit : true;
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const callback = this.async();
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const optionsFromPlugin = /** @type {TODO} */this[MiniCssExtractPlugin.pluginSymbol];
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if (!optionsFromPlugin) {
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callback(new Error("You forgot to add 'mini-css-extract-plugin' plugin (i.e. `{ plugins: [new MiniCssExtractPlugin()] }`), please read https://github.com/webpack-contrib/mini-css-extract-plugin#getting-started"));
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return;
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}
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const {
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webpack
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} = /** @type {Compiler} */this._compiler;
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/**
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* @param {TODO} originalExports
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* @param {Compilation} [compilation]
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* @param {{ [name: string]: Source }} [assets]
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* @param {Map<string, AssetInfo>} [assetsInfo]
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* @returns {void}
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*/
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const handleExports = (originalExports, compilation, assets, assetsInfo) => {
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/** @type {Locals | undefined} */
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let locals;
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let namedExport;
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const esModule = typeof options.esModule !== "undefined" ? options.esModule : true;
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/**
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* @param {Dependency[] | [null, object][]} dependencies
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*/
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const addDependencies = dependencies => {
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if (!Array.isArray(dependencies) && dependencies != null) {
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throw new Error(`Exported value was not extracted as an array: ${JSON.stringify(dependencies)}`);
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}
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const identifierCountMap = new Map();
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let lastDep;
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for (const dependency of dependencies) {
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if (! /** @type {Dependency} */dependency.identifier || !emit) {
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// eslint-disable-next-line no-continue
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continue;
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}
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const count = identifierCountMap.get( /** @type {Dependency} */dependency.identifier) || 0;
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const CssDependency = MiniCssExtractPlugin.getCssDependency(webpack);
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/** @type {NormalModule} */
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this._module.addDependency(lastDep = new CssDependency( /** @type {Dependency} */
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dependency, /** @type {Dependency} */
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dependency.context, count));
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identifierCountMap.set( /** @type {Dependency} */
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dependency.identifier, count + 1);
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}
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if (lastDep && assets) {
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lastDep.assets = assets;
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lastDep.assetsInfo = assetsInfo;
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}
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};
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try {
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// eslint-disable-next-line no-underscore-dangle
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const exports = originalExports.__esModule ? originalExports.default : originalExports;
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namedExport =
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// eslint-disable-next-line no-underscore-dangle
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originalExports.__esModule && (!originalExports.default || !("locals" in originalExports.default));
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if (namedExport) {
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Object.keys(originalExports).forEach(key => {
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if (key !== "default") {
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if (!locals) {
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locals = {};
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}
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/** @type {Locals} */
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locals[key] = originalExports[key];
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}
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});
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} else {
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locals = exports && exports.locals;
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}
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/** @type {Dependency[] | [null, object][]} */
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let dependencies;
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if (!Array.isArray(exports)) {
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dependencies = [[null, exports]];
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} else {
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dependencies = exports.map(([id, content, media, sourceMap, supports, layer]) => {
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let identifier = id;
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let context;
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if (compilation) {
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const module = /** @type {Module} */
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findModuleById(compilation, id);
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identifier = module.identifier();
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({
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context
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} = module);
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} else {
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// TODO check if this context is used somewhere
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context = this.rootContext;
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}
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return {
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identifier,
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context,
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content: Buffer.from(content),
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media,
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supports,
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layer,
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sourceMap: sourceMap ? Buffer.from(JSON.stringify(sourceMap)) :
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// eslint-disable-next-line no-undefined
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undefined
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};
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});
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}
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addDependencies(dependencies);
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} catch (e) {
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callback( /** @type {Error} */e);
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return;
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}
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const result = locals ? namedExport ? Object.keys(locals).map(key => `\nexport var ${key} = ${stringifyLocal( /** @type {Locals} */locals[key])};`).join("") : `\n${esModule ? "export default" : "module.exports ="} ${JSON.stringify(locals)};` : esModule ? `\nexport {};` : "";
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let resultSource = `// extracted by ${MiniCssExtractPlugin.pluginName}`;
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// only attempt hotreloading if the css is actually used for something other than hash values
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resultSource += this.hot && emit ? hotLoader(result, {
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loaderContext: this,
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options,
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locals
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}) : result;
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callback(null, resultSource);
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};
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let {
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publicPath
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} = /** @type {Compilation} */
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this._compilation.outputOptions;
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if (typeof options.publicPath === "string") {
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// eslint-disable-next-line prefer-destructuring
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publicPath = options.publicPath;
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} else if (typeof options.publicPath === "function") {
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publicPath = options.publicPath(this.resourcePath, this.rootContext);
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}
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if (publicPath === "auto") {
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publicPath = AUTO_PUBLIC_PATH;
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}
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if (typeof optionsFromPlugin.experimentalUseImportModule === "undefined" && typeof this.importModule === "function" || optionsFromPlugin.experimentalUseImportModule) {
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if (!this.importModule) {
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callback(new Error("You are using 'experimentalUseImportModule' but 'this.importModule' is not available in loader context. You need to have at least webpack 5.33.2."));
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return;
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}
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let publicPathForExtract;
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if (typeof publicPath === "string") {
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const isAbsolutePublicPath = /^[a-zA-Z][a-zA-Z\d+\-.]*?:/.test(publicPath);
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publicPathForExtract = isAbsolutePublicPath ? publicPath : `${ABSOLUTE_PUBLIC_PATH}${publicPath.replace(/\./g, SINGLE_DOT_PATH_SEGMENT)}`;
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} else {
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publicPathForExtract = publicPath;
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}
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this.importModule(`${this.resourcePath}.webpack[javascript/auto]!=!!!${request}`, {
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layer: options.layer,
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publicPath: /** @type {string} */publicPathForExtract,
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baseUri: `${BASE_URI}/`
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},
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/**
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* @param {Error | null | undefined} error
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* @param {object} exports
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*/
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(error, exports) => {
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if (error) {
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callback(error);
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return;
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}
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handleExports(exports);
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});
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return;
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}
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const loaders = this.loaders.slice(this.loaderIndex + 1);
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this.addDependency(this.resourcePath);
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const childFilename = "*";
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const outputOptions = {
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filename: childFilename,
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publicPath
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};
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const childCompiler = /** @type {Compilation} */
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this._compilation.createChildCompiler(`${MiniCssExtractPlugin.pluginName} ${request}`, outputOptions);
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// The templates are compiled and executed by NodeJS - similar to server side rendering
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// Unfortunately this causes issues as some loaders require an absolute URL to support ES Modules
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// The following config enables relative URL support for the child compiler
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childCompiler.options.module = {
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...childCompiler.options.module
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};
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childCompiler.options.module.parser = {
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...childCompiler.options.module.parser
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};
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childCompiler.options.module.parser.javascript = {
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...childCompiler.options.module.parser.javascript,
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url: "relative"
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};
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const {
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NodeTemplatePlugin
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} = webpack.node;
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const {
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NodeTargetPlugin
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} = webpack.node;
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new NodeTemplatePlugin(outputOptions).apply(childCompiler);
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new NodeTargetPlugin().apply(childCompiler);
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const {
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EntryOptionPlugin
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} = webpack;
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const {
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library: {
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EnableLibraryPlugin
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}
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} = webpack;
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new EnableLibraryPlugin("commonjs2").apply(childCompiler);
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EntryOptionPlugin.applyEntryOption(childCompiler, this.context, {
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child: {
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library: {
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type: "commonjs2"
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},
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import: [`!!${request}`]
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}
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});
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const {
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LimitChunkCountPlugin
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} = webpack.optimize;
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new LimitChunkCountPlugin({
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maxChunks: 1
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}).apply(childCompiler);
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const {
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NormalModule
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} = webpack;
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childCompiler.hooks.thisCompilation.tap(`${MiniCssExtractPlugin.pluginName} loader`,
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/**
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* @param {Compilation} compilation
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*/
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compilation => {
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const normalModuleHook = NormalModule.getCompilationHooks(compilation).loader;
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normalModuleHook.tap(`${MiniCssExtractPlugin.pluginName} loader`, (loaderContext, module) => {
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if (module.request === request) {
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// eslint-disable-next-line no-param-reassign
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module.loaders = loaders.map(loader => {
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return {
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type: null,
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loader: loader.path,
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options: loader.options,
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ident: loader.ident
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};
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});
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}
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});
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});
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/** @type {string | Buffer} */
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let source;
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childCompiler.hooks.compilation.tap(MiniCssExtractPlugin.pluginName,
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/**
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* @param {Compilation} compilation
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*/
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compilation => {
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compilation.hooks.processAssets.tap(MiniCssExtractPlugin.pluginName, () => {
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source = compilation.assets[childFilename] && compilation.assets[childFilename].source();
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// Remove all chunk assets
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compilation.chunks.forEach(chunk => {
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chunk.files.forEach(file => {
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compilation.deleteAsset(file);
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});
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});
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});
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});
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childCompiler.runAsChild((error, entries, compilation) => {
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if (error) {
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callback(error);
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return;
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}
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if ( /** @type {Compilation} */compilation.errors.length > 0) {
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callback( /** @type {Compilation} */compilation.errors[0]);
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return;
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}
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/** @type {{ [name: string]: Source }} */
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const assets = Object.create(null);
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/** @type {Map<string, AssetInfo>} */
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const assetsInfo = new Map();
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for (const asset of /** @type {Compilation} */compilation.getAssets()) {
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assets[asset.name] = asset.source;
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assetsInfo.set(asset.name, asset.info);
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}
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/** @type {Compilation} */
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compilation.fileDependencies.forEach(dep => {
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this.addDependency(dep);
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}, this);
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/** @type {Compilation} */
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compilation.contextDependencies.forEach(dep => {
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this.addContextDependency(dep);
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}, this);
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if (!source) {
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callback(new Error("Didn't get a result from child compiler"));
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return;
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}
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let originalExports;
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try {
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originalExports = evalModuleCode(this, source, request);
|
||
|
|
} catch (e) {
|
||
|
|
callback( /** @type {Error} */e);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
handleExports(originalExports, compilation, assets, assetsInfo);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @this {import("webpack").LoaderContext<LoaderOptions>}
|
||
|
|
* @param {string} content
|
||
|
|
*/
|
||
|
|
// eslint-disable-next-line consistent-return
|
||
|
|
function loader(content) {
|
||
|
|
if (this._compiler && this._compiler.options && this._compiler.options.experiments && this._compiler.options.experiments.css && this._module && this._module.type === "css") {
|
||
|
|
return content;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module.exports = loader;
|
||
|
|
module.exports.pitch = pitch;
|