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app_vue/node_modules/webpack/lib/ResolverFactory.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const Factory = require("enhanced-resolve").ResolverFactory;
+const { HookMap, SyncHook, SyncWaterfallHook } = require("tapable");
+const {
+	cachedCleverMerge,
+	removeOperations,
+	resolveByProperty
+} = require("./util/cleverMerge");
+
+/** @typedef {import("enhanced-resolve").ResolveContext} ResolveContext */
+/** @typedef {import("enhanced-resolve").ResolveOptions} ResolveOptions */
+/** @typedef {import("enhanced-resolve").ResolveRequest} ResolveRequest */
+/** @typedef {import("enhanced-resolve").Resolver} Resolver */
+/** @typedef {import("../declarations/WebpackOptions").ResolveOptions} WebpackResolveOptions */
+/** @typedef {import("../declarations/WebpackOptions").ResolvePluginInstance} ResolvePluginInstance */
+
+/** @typedef {WebpackResolveOptions & { dependencyType?: string, resolveToContext?: boolean }} ResolveOptionsWithDependencyType */
+/**
+ * @typedef {object} WithOptions
+ * @property {(options: Partial<ResolveOptionsWithDependencyType>) => ResolverWithOptions} withOptions create a resolver with additional/different options
+ */
+
+/** @typedef {Resolver & WithOptions} ResolverWithOptions */
+
+// need to be hoisted on module level for caching identity
+/** @type {ResolveOptionsWithDependencyType} */
+const EMPTY_RESOLVE_OPTIONS = {};
+
+/**
+ * @param {ResolveOptionsWithDependencyType} resolveOptionsWithDepType enhanced options
+ * @returns {ResolveOptions} merged options
+ */
+const convertToResolveOptions = resolveOptionsWithDepType => {
+	const { dependencyType, plugins, ...remaining } = resolveOptionsWithDepType;
+
+	// check type compat
+	/** @type {Partial<ResolveOptionsWithDependencyType>} */
+	const partialOptions = {
+		...remaining,
+		plugins:
+			plugins &&
+			/** @type {ResolvePluginInstance[]} */ (
+				plugins.filter(item => item !== "...")
+			)
+	};
+
+	if (!partialOptions.fileSystem) {
+		throw new Error(
+			"fileSystem is missing in resolveOptions, but it's required for enhanced-resolve"
+		);
+	}
+	// These weird types validate that we checked all non-optional properties
+	const options =
+		/** @type {Partial<ResolveOptionsWithDependencyType> & Pick<ResolveOptionsWithDependencyType, "fileSystem">} */ (
+			partialOptions
+		);
+
+	return /** @type {ResolveOptions} */ (
+		removeOperations(
+			resolveByProperty(options, "byDependency", dependencyType),
+			// Keep the `unsafeCache` because it can be a `Proxy`
+			["unsafeCache"]
+		)
+	);
+};
+
+/**
+ * @typedef {object} ResolverCache
+ * @property {WeakMap<ResolveOptionsWithDependencyType, ResolverWithOptions>} direct
+ * @property {Map<string, ResolverWithOptions>} stringified
+ */
+
+module.exports = class ResolverFactory {
+	constructor() {
+		this.hooks = Object.freeze({
+			/** @type {HookMap<SyncWaterfallHook<[ResolveOptionsWithDependencyType]>>} */
+			resolveOptions: new HookMap(
+				() => new SyncWaterfallHook(["resolveOptions"])
+			),
+			/** @type {HookMap<SyncHook<[Resolver, ResolveOptions, ResolveOptionsWithDependencyType]>>} */
+			resolver: new HookMap(
+				() => new SyncHook(["resolver", "resolveOptions", "userResolveOptions"])
+			)
+		});
+		/** @type {Map<string, ResolverCache>} */
+		this.cache = new Map();
+	}
+
+	/**
+	 * @param {string} type type of resolver
+	 * @param {ResolveOptionsWithDependencyType=} resolveOptions options
+	 * @returns {ResolverWithOptions} the resolver
+	 */
+	get(type, resolveOptions = EMPTY_RESOLVE_OPTIONS) {
+		let typedCaches = this.cache.get(type);
+		if (!typedCaches) {
+			typedCaches = {
+				direct: new WeakMap(),
+				stringified: new Map()
+			};
+			this.cache.set(type, typedCaches);
+		}
+		const cachedResolver = typedCaches.direct.get(resolveOptions);
+		if (cachedResolver) {
+			return cachedResolver;
+		}
+		const ident = JSON.stringify(resolveOptions);
+		const resolver = typedCaches.stringified.get(ident);
+		if (resolver) {
+			typedCaches.direct.set(resolveOptions, resolver);
+			return resolver;
+		}
+		const newResolver = this._create(type, resolveOptions);
+		typedCaches.direct.set(resolveOptions, newResolver);
+		typedCaches.stringified.set(ident, newResolver);
+		return newResolver;
+	}
+
+	/**
+	 * @param {string} type type of resolver
+	 * @param {ResolveOptionsWithDependencyType} resolveOptionsWithDepType options
+	 * @returns {ResolverWithOptions} the resolver
+	 */
+	_create(type, resolveOptionsWithDepType) {
+		/** @type {ResolveOptionsWithDependencyType} */
+		const originalResolveOptions = { ...resolveOptionsWithDepType };
+
+		const resolveOptions = convertToResolveOptions(
+			this.hooks.resolveOptions.for(type).call(resolveOptionsWithDepType)
+		);
+		const resolver = /** @type {ResolverWithOptions} */ (
+			Factory.createResolver(resolveOptions)
+		);
+		if (!resolver) {
+			throw new Error("No resolver created");
+		}
+		/** @type {WeakMap<Partial<ResolveOptionsWithDependencyType>, ResolverWithOptions>} */
+		const childCache = new WeakMap();
+		resolver.withOptions = options => {
+			const cacheEntry = childCache.get(options);
+			if (cacheEntry !== undefined) return cacheEntry;
+			const mergedOptions = cachedCleverMerge(originalResolveOptions, options);
+			const resolver = this.get(type, mergedOptions);
+			childCache.set(options, resolver);
+			return resolver;
+		};
+		this.hooks.resolver
+			.for(type)
+			.call(resolver, resolveOptions, originalResolveOptions);
+		return resolver;
+	}
+};