mirror of https://github.com/webpack/webpack.git
44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const Factory = require("enhanced-resolve").ResolverFactory;
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const { HookMap, SyncHook, SyncWaterfallHook } = require("tapable");
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module.exports = class ResolverFactory {
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constructor() {
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this.hooks = Object.freeze({
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resolveOptions: new HookMap(
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() => new SyncWaterfallHook(["resolveOptions"])
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),
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resolver: new HookMap(() => new SyncHook(["resolver", "resolveOptions"]))
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});
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this.cache1 = new WeakMap();
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this.cache2 = new Map();
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}
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get(type, resolveOptions) {
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const cachedResolver = this.cache1.get(resolveOptions);
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if (cachedResolver) return cachedResolver();
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const ident = `${type}|${JSON.stringify(resolveOptions)}`;
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const resolver = this.cache2.get(ident);
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if (resolver) return resolver;
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const newResolver = this._create(type, resolveOptions);
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this.cache2.set(ident, newResolver);
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return newResolver;
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}
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_create(type, resolveOptions) {
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resolveOptions = this.hooks.resolveOptions.for(type).call(resolveOptions);
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const resolver = Factory.createResolver(resolveOptions);
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if (!resolver) {
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throw new Error("No resolver created");
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}
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this.hooks.resolver.for(type).call(resolver, resolveOptions);
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return resolver;
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}
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};
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