feat(CSS): pathinfo support

lib/ModuleInfoHeaderPlugin.js

@@ -8,6 +8,7 @@
 const { ConcatSource, RawSource, CachedSource } = require("webpack-sources");
 const { UsageState } = require("./ExportsInfo");
 const Template = require("./Template");
+const CssModulesPlugin = require("./css/CssModulesPlugin");
 const JavascriptModulesPlugin = require("./javascript/JavascriptModulesPlugin");
 
 /** @typedef {import("webpack-sources").Source} Source */
@@ -163,8 +164,9 @@ class ModuleInfoHeaderPlugin {
 	apply(compiler) {
 		const { _verbose: verbose } = this;
 		compiler.hooks.compilation.tap("ModuleInfoHeaderPlugin", compilation => {
-			const hooks = JavascriptModulesPlugin.getCompilationHooks(compilation);
-			hooks.renderModulePackage.tap(
+			const javascriptHooks =
+				JavascriptModulesPlugin.getCompilationHooks(compilation);
+			javascriptHooks.renderModulePackage.tap(
 				"ModuleInfoHeaderPlugin",
 				(
 					moduleSource,
@@ -195,11 +197,7 @@ class ModuleInfoHeaderPlugin {
 					const source = new ConcatSource();
 					let header = cacheEntry.header;
 					if (header === undefined) {
-						const req = module.readableIdentifier(requestShortener);
-						const reqStr = req.replace(/\*\//g, "*_/");
-						const reqStrStar = "*".repeat(reqStr.length);
-						const headerStr = `/*!****${reqStrStar}****!*\\\n  !*** ${reqStr} ***!\n  \\****${reqStrStar}****/\n`;
-						header = new RawSource(headerStr);
+						header = this.generateHeader(module, requestShortener);
 						cacheEntry.header = header;
 					}
 					source.add(header);
@@ -248,11 +246,69 @@ class ModuleInfoHeaderPlugin {
 					return cachedSource;
 				}
 			);
-			hooks.chunkHash.tap("ModuleInfoHeaderPlugin", (chunk, hash) => {
+			javascriptHooks.chunkHash.tap(
+				"ModuleInfoHeaderPlugin",
+				(_chunk, hash) => {
+					hash.update("ModuleInfoHeaderPlugin");
+					hash.update("1");
+				}
+			);
+			const cssHooks = CssModulesPlugin.getCompilationHooks(compilation);
+			cssHooks.renderModulePackage.tap(
+				"ModuleInfoHeaderPlugin",
+				(moduleSource, module, { runtimeTemplate }) => {
+					const { requestShortener } = runtimeTemplate;
+					let cacheEntry;
+					let cache = caches.get(requestShortener);
+					if (cache === undefined) {
+						caches.set(requestShortener, (cache = new WeakMap()));
+						cache.set(
+							module,
+							(cacheEntry = { header: undefined, full: new WeakMap() })
+						);
+					} else {
+						cacheEntry = cache.get(module);
+						if (cacheEntry === undefined) {
+							cache.set(
+								module,
+								(cacheEntry = { header: undefined, full: new WeakMap() })
+							);
+						} else if (!verbose) {
+							const cachedSource = cacheEntry.full.get(moduleSource);
+							if (cachedSource !== undefined) return cachedSource;
+						}
+					}
+					const source = new ConcatSource();
+					let header = cacheEntry.header;
+					if (header === undefined) {
+						header = this.generateHeader(module, requestShortener);
+						cacheEntry.header = header;
+					}
+					source.add(header);
+					source.add(moduleSource);
+					const cachedSource = new CachedSource(source);
+					cacheEntry.full.set(moduleSource, cachedSource);
+					return cachedSource;
+				}
+			);
+			cssHooks.chunkHash.tap("ModuleInfoHeaderPlugin", (_chunk, hash) => {
 				hash.update("ModuleInfoHeaderPlugin");
 				hash.update("1");
 			});
 		});
 	}
+
+	/**
+	 * @param {Module} module the module
+	 * @param {RequestShortener} requestShortener request shortener
+	 * @returns {RawSource} the header
+	 */
+	generateHeader(module, requestShortener) {
+		const req = module.readableIdentifier(requestShortener);
+		const reqStr = req.replace(/\*\//g, "*_/");
+		const reqStrStar = "*".repeat(reqStr.length);
+		const headerStr = `/*!****${reqStrStar}****!*\\\n  !*** ${reqStr} ***!\n  \\****${reqStrStar}****/\n`;
+		return new RawSource(headerStr);
+	}
 }
 module.exports = ModuleInfoHeaderPlugin;

lib/css/CssModulesPlugin.js

@@ -5,13 +5,16 @@
 
 "use strict";
 
+const { SyncWaterfallHook, SyncHook } = require("tapable");
 const {
 	ConcatSource,
 	PrefixSource,
 	ReplaceSource,
 	CachedSource
 } = require("webpack-sources");
+const Compilation = require("../Compilation");
 const CssModule = require("../CssModule");
+const { tryRunOrWebpackError } = require("../HookWebpackError");
 const HotUpdateChunk = require("../HotUpdateChunk");
 const {
 	CSS_MODULE_TYPE,
@@ -43,14 +46,27 @@ const CssParser = require("./CssParser");
 /** @typedef {import("../Chunk")} Chunk */
 /** @typedef {import("../ChunkGraph")} ChunkGraph */
 /** @typedef {import("../CodeGenerationResults")} CodeGenerationResults */
-/** @typedef {import("../Compilation")} Compilation */
+/** @typedef {import("../Compilation").ChunkHashContext} ChunkHashContext */
 /** @typedef {import("../Compiler")} Compiler */
 /** @typedef {import("../CssModule").Inheritance} Inheritance */
 /** @typedef {import("../DependencyTemplate").CssExportsData} CssExportsData */
 /** @typedef {import("../Module")} Module */
+/** @typedef {import("../Template").RuntimeTemplate} RuntimeTemplate */
 /** @typedef {import("../TemplatedPathPlugin").TemplatePath} TemplatePath */
+/** @typedef {import("../util/Hash")} Hash */
 /** @typedef {import("../util/memoize")} Memoize */
 
+/**
+ * @typedef {object} ChunkRenderContext
+ * @property {RuntimeTemplate} runtimeTemplate runtime template
+ */
+
+/**
+ * @typedef {object} CompilationHooks
+ * @property {SyncWaterfallHook<[Source, Module, ChunkRenderContext]>} renderModulePackage
+ * @property {SyncHook<[Chunk, Hash, ChunkHashContext]>} chunkHash
+ */
+
 const getCssLoadingRuntimeModule = memoize(() =>
 	require("./CssLoadingRuntimeModule")
 );
@@ -121,6 +137,9 @@ const validateParserOptions = {
 	)
 };
 
+/** @type {WeakMap<Compilation, CompilationHooks>} */
+const compilationHooksMap = new WeakMap();
+
 /**
  * @param {string} str string
  * @param {boolean=} omitOptionalUnderscore if true, optional underscore is not added
@@ -166,9 +185,34 @@ const lzwEncode = str => {
 	return encoded;
 };
 
-const plugin = "CssModulesPlugin";
+const PLUGIN_NAME = "CssModulesPlugin";
 
 class CssModulesPlugin {
+	/**
+	 * @param {Compilation} compilation the compilation
+	 * @returns {CompilationHooks} the attached hooks
+	 */
+	static getCompilationHooks(compilation) {
+		if (!(compilation instanceof Compilation)) {
+			throw new TypeError(
+				"The 'compilation' argument must be an instance of Compilation"
+			);
+		}
+		let hooks = compilationHooksMap.get(compilation);
+		if (hooks === undefined) {
+			hooks = {
+				renderModulePackage: new SyncWaterfallHook([
+					"source",
+					"module",
+					"renderContext"
+				]),
+				chunkHash: new SyncHook(["chunk", "hash", "context"])
+			};
+			compilationHooksMap.set(compilation, hooks);
+		}
+		return hooks;
+	}
+
 	constructor() {
 		/** @type {WeakMap<Source, { undoPath: string, inheritance: Inheritance, source: CachedSource }>} */
 		this._moduleCache = new WeakMap();
@@ -181,8 +225,9 @@ class CssModulesPlugin {
 	 */
 	apply(compiler) {
 		compiler.hooks.compilation.tap(
-			plugin,
+			PLUGIN_NAME,
 			(compilation, { normalModuleFactory }) => {
+				const hooks = CssModulesPlugin.getCompilationHooks(compilation);
 				const selfFactory = new SelfModuleFactory(compilation.moduleGraph);
 				compilation.dependencyFactories.set(
 					CssUrlDependency,
@@ -228,7 +273,7 @@ class CssModulesPlugin {
 				]) {
 					normalModuleFactory.hooks.createParser
 						.for(type)
-						.tap(plugin, parserOptions => {
+						.tap(PLUGIN_NAME, parserOptions => {
 							validateParserOptions[type](parserOptions);
 							const { namedExports } = parserOptions;
 
@@ -252,7 +297,7 @@ class CssModulesPlugin {
 						});
 					normalModuleFactory.hooks.createGenerator
 						.for(type)
-						.tap(plugin, generatorOptions => {
+						.tap(PLUGIN_NAME, generatorOptions => {
 							validateGeneratorOptions[type](generatorOptions);
 
 							return generatorOptions.exportsOnly
@@ -269,7 +314,7 @@ class CssModulesPlugin {
 						});
 					normalModuleFactory.hooks.createModuleClass
 						.for(type)
-						.tap(plugin, (createData, resolveData) => {
+						.tap(PLUGIN_NAME, (createData, resolveData) => {
 							if (resolveData.dependencies.length > 0) {
 								// When CSS is imported from CSS there is only one dependency
 								const dependency = resolveData.dependencies[0];
@@ -341,9 +386,18 @@ class CssModulesPlugin {
 						}
 					}
 				});
+				compilation.hooks.chunkHash.tap(
+					"CssModulesPlugin",
+					(chunk, hash, context) => {
+						hooks.chunkHash.call(chunk, hash, context);
+					}
+				);
 				compilation.hooks.contentHash.tap("CssModulesPlugin", chunk => {
 					const {
 						chunkGraph,
+						codeGenerationResults,
+						moduleGraph,
+						runtimeTemplate,
 						outputOptions: {
 							hashSalt,
 							hashDigest,
@@ -351,19 +405,27 @@ class CssModulesPlugin {
 							hashFunction
 						}
 					} = compilation;
-					const modules = orderedCssModulesPerChunk.get(chunk);
-					if (modules === undefined) return;
 					const hash = createHash(hashFunction);
 					if (hashSalt) hash.update(hashSalt);
-					for (const module of modules) {
-						hash.update(chunkGraph.getModuleHash(module, chunk.runtime));
+					hooks.chunkHash.call(chunk, hash, {
+						chunkGraph,
+						codeGenerationResults,
+						moduleGraph,
+						runtimeTemplate
+					});
+					const modules = orderedCssModulesPerChunk.get(chunk);
+					if (modules) {
+						for (const module of modules) {
+							hash.update(chunkGraph.getModuleHash(module, chunk.runtime));
+						}
 					}
 					const digest = /** @type {string} */ (hash.digest(hashDigest));
 					chunk.contentHash.css = nonNumericOnlyHash(digest, hashDigestLength);
 				});
-				compilation.hooks.renderManifest.tap(plugin, (result, options) => {
+				compilation.hooks.renderManifest.tap(PLUGIN_NAME, (result, options) => {
 					const { chunkGraph } = compilation;
-					const { hash, chunk, codeGenerationResults } = options;
+					const { hash, chunk, codeGenerationResults, runtimeTemplate } =
+						options;
 
 					if (chunk instanceof HotUpdateChunk) return result;
 
@@ -397,7 +459,9 @@ class CssModulesPlugin {
 									cssHeadDataCompression:
 										compilation.outputOptions.cssHeadDataCompression,
 									undoPath,
-									modules
+									modules,
+									runtimeTemplate,
+									hooks
 								}),
 							filename,
 							info,
@@ -441,13 +505,13 @@ class CssModulesPlugin {
 				};
 				compilation.hooks.runtimeRequirementInTree
 					.for(RuntimeGlobals.hasCssModules)
-					.tap(plugin, handler);
+					.tap(PLUGIN_NAME, handler);
 				compilation.hooks.runtimeRequirementInTree
 					.for(RuntimeGlobals.ensureChunkHandlers)
-					.tap(plugin, handler);
+					.tap(PLUGIN_NAME, handler);
 				compilation.hooks.runtimeRequirementInTree
 					.for(RuntimeGlobals.hmrDownloadUpdateHandlers)
-					.tap(plugin, handler);
+					.tap(PLUGIN_NAME, handler);
 			}
 		);
 	}
@@ -600,6 +664,8 @@ class CssModulesPlugin {
 	 * @param {ChunkGraph} options.chunkGraph chunk graph
 	 * @param {CodeGenerationResults} options.codeGenerationResults code generation results
 	 * @param {CssModule} options.module css module
+	 * @param {RuntimeTemplate} options.runtimeTemplate runtime template
+	 * @param {CompilationHooks} options.hooks hooks
 	 * @returns {Source} css module source
 	 */
 	renderModule({
@@ -608,7 +674,9 @@ class CssModulesPlugin {
 		chunk,
 		chunkGraph,
 		codeGenerationResults,
-		module
+		module,
+		hooks,
+		runtimeTemplate
 	}) {
 		const codeGenResult = codeGenerationResults.get(module, chunk.runtime);
 		const moduleSourceContent =
@@ -722,7 +790,13 @@ class CssModulesPlugin {
 					: ""
 			}${esModule ? "&" : ""}${escapeCss(moduleId)}`
 		);
-		return source;
+		return tryRunOrWebpackError(
+			() =>
+				hooks.renderModulePackage.call(source, module, {
+					runtimeTemplate
+				}),
+			"CssModulesPlugin.getCompilationHooks().renderModulePackage"
+		);
 	}
 
 	/**
@@ -734,6 +808,8 @@ class CssModulesPlugin {
 	 * @param {ChunkGraph} options.chunkGraph chunk graph
 	 * @param {CodeGenerationResults} options.codeGenerationResults code generation results
 	 * @param {CssModule[]} options.modules ordered css modules
+	 * @param {RuntimeTemplate} options.runtimeTemplate runtime template
+	 * @param {CompilationHooks} options.hooks hooks
 	 * @returns {Source} generated source
 	 */
 	renderChunk({
@@ -743,7 +819,9 @@ class CssModulesPlugin {
 		chunk,
 		chunkGraph,
 		codeGenerationResults,
-		modules
+		modules,
+		runtimeTemplate,
+		hooks
 	}) {
 		const source = new ConcatSource();
 		/** @type {string[]} */
@@ -756,7 +834,9 @@ class CssModulesPlugin {
 					chunk,
 					chunkGraph,
 					codeGenerationResults,
-					module
+					module,
+					runtimeTemplate,
+					hooks
 				});
 				source.add(moduleSource);
 			} catch (err) {
@@ -772,6 +852,7 @@ class CssModulesPlugin {
 				true
 			)}:${cssHeadDataCompression ? lzwEncode(metaDataStr) : metaDataStr};}`
 		);
+		chunk.rendered = true;
 		return source;
 	}
 

test/configCases/css/pathinfo/index.js

@@ -0,0 +1,14 @@
+import * as style from "./style.css";
+
+it("should compile and load style on demand", done => {
+	expect(style).toEqual(nsObj({}));
+	import("./style2.css").then(x => {
+		expect(x).toEqual(nsObj({}));
+		const style = getComputedStyle(document.body);
+		expect(style.getPropertyValue("background")).toBe(" red");
+		expect(style.getPropertyValue("margin")).toBe(" 10px");
+		expect(style.getPropertyValue("color")).toBe(" green");
+		expect(style.getPropertyValue("padding")).toBe(" 20px 10px");
+		done();
+	}, done);
+});

test/configCases/css/pathinfo/style-imported.css

@@ -0,0 +1,3 @@
+body {
+	margin: 10px;
+}

test/configCases/css/pathinfo/style.css

@@ -0,0 +1,4 @@
+@import "style-imported.css";
+body {
+	background: red;
+}

test/configCases/css/pathinfo/style2-imported.css

@@ -0,0 +1,3 @@
+body {
+	padding: 20px 10px;
+}

test/configCases/css/pathinfo/style2.css

@@ -0,0 +1,4 @@
+@import "./style2-imported.css";
+body {
+	color: green;
+}

test/configCases/css/pathinfo/test.config.js

@@ -0,0 +1,30 @@
+const fs = require("fs");
+const path = require("path");
+
+module.exports = {
+	moduleScope(scope) {
+		const link = scope.window.document.createElement("link");
+		link.rel = "stylesheet";
+		link.href = "bundle0.css";
+		scope.window.document.head.appendChild(link);
+	},
+	findBundle: function (i, options) {
+		const source = fs.readFileSync(
+			path.resolve(options.output.path, "bundle0.css"),
+			"utf-8"
+		);
+
+		if (
+			!source.includes(`/*!********************************!*\\
+  !*** css ./style-imported.css ***!
+  \\********************************/`) &&
+			!source.includes(`/*!***********************!*\\
+  !*** css ./style.css ***!
+  \\***********************/`)
+		) {
+			throw new Error("The `pathinfo` option doesn't work.");
+		}
+
+		return "./bundle0.js";
+	}
+};

test/configCases/css/pathinfo/webpack.config.js

@@ -0,0 +1,13 @@
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	target: "web",
+	mode: "development",
+	devtool: false,
+	output: {
+		pathinfo: true,
+		cssChunkFilename: "[name].[chunkhash].css"
+	},
+	experiments: {
+		css: true
+	}
+};

test/helpers/FakeDocument.js

@@ -207,23 +207,26 @@ class FakeSheet {
 						.replace(/^https:\/\/example\.com\//, "")
 				);
 		let css = fs.readFileSync(filepath, "utf-8");
-		css = css.replace(/@import url\("([^"]+)"\);/g, (match, url) => {
-			if (!/^https:\/\/test\.cases\/path\//.test(url)) {
-				return url;
-			}
+		css = css
+			// Remove comments
+			.replace(/\/\*.*?\*\//gms, "")
+			.replace(/@import url\("([^"]+)"\);/g, (match, url) => {
+				if (!/^https:\/\/test\.cases\/path\//.test(url)) {
+					return url;
+				}
 
-			if (url.startsWith("#")) {
-				return url;
-			}
+				if (url.startsWith("#")) {
+					return url;
+				}
 
-			return fs.readFileSync(
-				path.resolve(
-					this._basePath,
-					url.replace(/^https:\/\/test\.cases\/path\//, "")
-				),
-				"utf-8"
-			);
-		});
+				return fs.readFileSync(
+					path.resolve(
+						this._basePath,
+						url.replace(/^https:\/\/test\.cases\/path\//, "")
+					),
+					"utf-8"
+				);
+			});
 		walkCssTokens(css, {
 			isSelector() {
 				return selector === undefined;