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node_modules/webpack/lib/sharing/ConsumeSharedModule.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { RawSource } = require("webpack-sources");
+const AsyncDependenciesBlock = require("../AsyncDependenciesBlock");
+const Module = require("../Module");
+const {
+	CONSUME_SHARED_TYPES,
+	JAVASCRIPT_TYPES
+} = require("../ModuleSourceTypeConstants");
+const {
+	WEBPACK_MODULE_TYPE_CONSUME_SHARED_MODULE
+} = require("../ModuleTypeConstants");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const makeSerializable = require("../util/makeSerializable");
+const { rangeToString, stringifyHoley } = require("../util/semver");
+const ConsumeSharedFallbackDependency = require("./ConsumeSharedFallbackDependency");
+
+/** @type {WeakMap<ModuleGraph, WeakMap<ConsumeSharedModule, Module | null>>} */
+const fallbackModuleCache = new WeakMap();
+
+/** @typedef {import("../config/defaults").WebpackOptionsNormalizedWithDefaults} WebpackOptions */
+/** @typedef {import("../Compilation")} Compilation */
+/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
+/** @typedef {import("../Module").BuildCallback} BuildCallback */
+/** @typedef {import("../Module").CodeGenerationContext} CodeGenerationContext */
+/** @typedef {import("../Module").CodeGenerationResult} CodeGenerationResult */
+/** @typedef {import("../Module").LibIdentOptions} LibIdentOptions */
+/** @typedef {import("../Module").LibIdent} LibIdent */
+/** @typedef {import("../Module").NeedBuildCallback} NeedBuildCallback */
+/** @typedef {import("../Module").NeedBuildContext} NeedBuildContext */
+/** @typedef {import("../Module").Sources} Sources */
+/** @typedef {import("../Module").SourceTypes} SourceTypes */
+/** @typedef {import("../ModuleGraph")} ModuleGraph */
+/** @typedef {import("../Module").ExportsType} ExportsType */
+/** @typedef {import("../RequestShortener")} RequestShortener */
+/** @typedef {import("../ResolverFactory").ResolverWithOptions} ResolverWithOptions */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
+/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
+/** @typedef {import("../util/Hash")} Hash */
+/** @typedef {import("../util/fs").InputFileSystem} InputFileSystem */
+/** @typedef {import("../util/semver").SemVerRange} SemVerRange */
+/** @typedef {import("../Module").BasicSourceTypes} BasicSourceTypes */
+
+/**
+ * @typedef {object} ConsumeOptions
+ * @property {string=} import fallback request
+ * @property {string=} importResolved resolved fallback request
+ * @property {string} shareKey global share key
+ * @property {string} shareScope share scope
+ * @property {SemVerRange | false | undefined} requiredVersion version requirement
+ * @property {string=} packageName package name to determine required version automatically
+ * @property {boolean} strictVersion don't use shared version even if version isn't valid
+ * @property {boolean} singleton use single global version
+ * @property {boolean} eager include the fallback module in a sync way
+ */
+
+class ConsumeSharedModule extends Module {
+	/**
+	 * @param {string} context context
+	 * @param {ConsumeOptions} options consume options
+	 */
+	constructor(context, options) {
+		super(WEBPACK_MODULE_TYPE_CONSUME_SHARED_MODULE, context);
+		this.options = options;
+	}
+
+	/**
+	 * @returns {string} a unique identifier of the module
+	 */
+	identifier() {
+		const {
+			shareKey,
+			shareScope,
+			importResolved,
+			requiredVersion,
+			strictVersion,
+			singleton,
+			eager
+		} = this.options;
+		return `${WEBPACK_MODULE_TYPE_CONSUME_SHARED_MODULE}|${shareScope}|${shareKey}|${
+			requiredVersion && rangeToString(requiredVersion)
+		}|${strictVersion}|${importResolved}|${singleton}|${eager}`;
+	}
+
+	/**
+	 * @param {RequestShortener} requestShortener the request shortener
+	 * @returns {string} a user readable identifier of the module
+	 */
+	readableIdentifier(requestShortener) {
+		const {
+			shareKey,
+			shareScope,
+			importResolved,
+			requiredVersion,
+			strictVersion,
+			singleton,
+			eager
+		} = this.options;
+		return `consume shared module (${shareScope}) ${shareKey}@${
+			requiredVersion ? rangeToString(requiredVersion) : "*"
+		}${strictVersion ? " (strict)" : ""}${singleton ? " (singleton)" : ""}${
+			importResolved
+				? ` (fallback: ${requestShortener.shorten(importResolved)})`
+				: ""
+		}${eager ? " (eager)" : ""}`;
+	}
+
+	/**
+	 * @param {LibIdentOptions} options options
+	 * @returns {LibIdent | null} an identifier for library inclusion
+	 */
+	libIdent(options) {
+		const { shareKey, shareScope, import: request } = this.options;
+		return `${
+			this.layer ? `(${this.layer})/` : ""
+		}webpack/sharing/consume/${shareScope}/${shareKey}${
+			request ? `/${request}` : ""
+		}`;
+	}
+
+	/**
+	 * @param {NeedBuildContext} context context info
+	 * @param {NeedBuildCallback} callback callback function, returns true, if the module needs a rebuild
+	 * @returns {void}
+	 */
+	needBuild(context, callback) {
+		callback(null, !this.buildInfo);
+	}
+
+	/**
+	 * @param {WebpackOptions} options webpack options
+	 * @param {Compilation} compilation the compilation
+	 * @param {ResolverWithOptions} resolver the resolver
+	 * @param {InputFileSystem} fs the file system
+	 * @param {BuildCallback} callback callback function
+	 * @returns {void}
+	 */
+	build(options, compilation, resolver, fs, callback) {
+		this.buildMeta = {};
+		this.buildInfo = {};
+		if (this.options.import) {
+			const dep = new ConsumeSharedFallbackDependency(this.options.import);
+			if (this.options.eager) {
+				this.addDependency(dep);
+			} else {
+				const block = new AsyncDependenciesBlock({});
+				block.addDependency(dep);
+				this.addBlock(block);
+			}
+		}
+		callback();
+	}
+
+	/**
+	 * @returns {SourceTypes} types available (do not mutate)
+	 */
+	getSourceTypes() {
+		return CONSUME_SHARED_TYPES;
+	}
+
+	/**
+	 * Basic source types are high-level categories like javascript, css, webassembly, etc.
+	 * We only have built-in knowledge about the javascript basic type here; other basic types may be
+	 * added or changed over time by generators and do not need to be handled or detected here.
+	 *
+	 * Some modules, e.g. RemoteModule, may return non-basic source types like "remote" and "share-init"
+	 * from getSourceTypes(), but their generated output is still JavaScript, i.e. their basic type is JS.
+	 * @returns {BasicSourceTypes} types available (do not mutate)
+	 */
+	getSourceBasicTypes() {
+		return JAVASCRIPT_TYPES;
+	}
+
+	/**
+	 * @param {ModuleGraph} moduleGraph the module graph
+	 * @returns {Module | null} fallback module
+	 */
+	_getFallbackModule(moduleGraph) {
+		let moduleCache = fallbackModuleCache.get(moduleGraph);
+		if (!moduleCache) {
+			moduleCache = new WeakMap();
+			fallbackModuleCache.set(moduleGraph, moduleCache);
+		}
+		const cached = moduleCache.get(this);
+		if (cached !== undefined) {
+			return cached;
+		}
+
+		/** @type {undefined | null | Module} */
+		let fallbackModule = null;
+
+		if (this.options.import) {
+			if (this.options.eager) {
+				const dep = this.dependencies[0];
+				if (dep) {
+					fallbackModule = moduleGraph.getModule(dep);
+				}
+			} else {
+				const block = this.blocks[0];
+				if (block && block.dependencies.length > 0) {
+					fallbackModule = moduleGraph.getModule(block.dependencies[0]);
+				}
+			}
+		}
+
+		moduleCache.set(this, fallbackModule);
+		return fallbackModule;
+	}
+
+	/**
+	 * @param {ModuleGraph} moduleGraph the module graph
+	 * @param {boolean | undefined} strict the importing module is strict
+	 * @returns {ExportsType} export type
+	 * "namespace": Exports is already a namespace object. namespace = exports.
+	 * "dynamic": Check at runtime if __esModule is set. When set: namespace = { ...exports, default: exports }. When not set: namespace = { default: exports }.
+	 * "default-only": Provide a namespace object with only default export. namespace = { default: exports }
+	 * "default-with-named": Provide a namespace object with named and default export. namespace = { ...exports, default: exports }
+	 */
+	getExportsType(moduleGraph, strict) {
+		const fallbackModule = this._getFallbackModule(moduleGraph);
+		if (!fallbackModule) return "dynamic";
+		return fallbackModule.getExportsType(moduleGraph, strict);
+	}
+
+	/**
+	 * @param {string=} type the source type for which the size should be estimated
+	 * @returns {number} the estimated size of the module (must be non-zero)
+	 */
+	size(type) {
+		return 42;
+	}
+
+	/**
+	 * @param {Hash} hash the hash used to track dependencies
+	 * @param {UpdateHashContext} context context
+	 * @returns {void}
+	 */
+	updateHash(hash, context) {
+		hash.update(JSON.stringify(this.options));
+		super.updateHash(hash, context);
+	}
+
+	/**
+	 * @param {CodeGenerationContext} context context for code generation
+	 * @returns {CodeGenerationResult} result
+	 */
+	codeGeneration({ chunkGraph, runtimeTemplate }) {
+		const runtimeRequirements = new Set([RuntimeGlobals.shareScopeMap]);
+		const {
+			shareScope,
+			shareKey,
+			strictVersion,
+			requiredVersion,
+			import: request,
+			singleton,
+			eager
+		} = this.options;
+		/** @type {undefined | string} */
+		let fallbackCode;
+		if (request) {
+			if (eager) {
+				const dep = this.dependencies[0];
+				fallbackCode = runtimeTemplate.syncModuleFactory({
+					dependency: dep,
+					chunkGraph,
+					runtimeRequirements,
+					request: this.options.import
+				});
+			} else {
+				const block = this.blocks[0];
+				fallbackCode = runtimeTemplate.asyncModuleFactory({
+					block,
+					chunkGraph,
+					runtimeRequirements,
+					request: this.options.import
+				});
+			}
+		}
+
+		const args = [
+			JSON.stringify(shareScope),
+			JSON.stringify(shareKey),
+			JSON.stringify(eager)
+		];
+		if (requiredVersion) {
+			args.push(stringifyHoley(requiredVersion));
+		}
+		if (fallbackCode) {
+			args.push(fallbackCode);
+		}
+
+		/** @type {string} */
+		let fn;
+
+		if (requiredVersion) {
+			if (strictVersion) {
+				fn = singleton ? "loadStrictSingletonVersion" : "loadStrictVersion";
+			} else {
+				fn = singleton ? "loadSingletonVersion" : "loadVersion";
+			}
+		} else {
+			fn = singleton ? "loadSingleton" : "load";
+		}
+
+		const code = runtimeTemplate.returningFunction(`${fn}(${args.join(", ")})`);
+		/** @type {Sources} */
+		const sources = new Map();
+		sources.set("consume-shared", new RawSource(code));
+		return {
+			runtimeRequirements,
+			sources
+		};
+	}
+
+	/**
+	 * @param {ObjectSerializerContext} context context
+	 */
+	serialize(context) {
+		const { write } = context;
+		write(this.options);
+		super.serialize(context);
+	}
+
+	/**
+	 * @param {ObjectDeserializerContext} context context
+	 */
+	deserialize(context) {
+		const { read } = context;
+		this.options = read();
+		super.deserialize(context);
+	}
+}
+
+makeSerializable(
+	ConsumeSharedModule,
+	"webpack/lib/sharing/ConsumeSharedModule"
+);
+
+module.exports = ConsumeSharedModule;