79 lines
2.3 KiB
JavaScript
79 lines
2.3 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
"use strict";
|
|
|
|
const { Tapable, HookMap, SyncHook, SyncWaterfallHook } = require("tapable");
|
|
const Factory = require("enhanced-resolve").ResolverFactory;
|
|
const { cachedCleverMerge } = require("./util/cleverMerge");
|
|
|
|
/** @typedef {import("enhanced-resolve").Resolver} Resolver */
|
|
|
|
const EMTPY_RESOLVE_OPTIONS = {};
|
|
|
|
module.exports = class ResolverFactory extends Tapable {
|
|
constructor() {
|
|
super();
|
|
this.hooks = {
|
|
resolveOptions: new HookMap(
|
|
() => new SyncWaterfallHook(["resolveOptions"])
|
|
),
|
|
resolver: new HookMap(() => new SyncHook(["resolver", "resolveOptions"]))
|
|
};
|
|
this._pluginCompat.tap("ResolverFactory", options => {
|
|
let match;
|
|
match = /^resolve-options (.+)$/.exec(options.name);
|
|
if (match) {
|
|
this.hooks.resolveOptions.tap(
|
|
match[1],
|
|
options.fn.name || "unnamed compat plugin",
|
|
options.fn
|
|
);
|
|
return true;
|
|
}
|
|
match = /^resolver (.+)$/.exec(options.name);
|
|
if (match) {
|
|
this.hooks.resolver.tap(
|
|
match[1],
|
|
options.fn.name || "unnamed compat plugin",
|
|
options.fn
|
|
);
|
|
return true;
|
|
}
|
|
});
|
|
this.cache2 = new Map();
|
|
}
|
|
|
|
get(type, resolveOptions) {
|
|
resolveOptions = resolveOptions || EMTPY_RESOLVE_OPTIONS;
|
|
const ident = `${type}|${JSON.stringify(resolveOptions)}`;
|
|
const resolver = this.cache2.get(ident);
|
|
if (resolver) return resolver;
|
|
const newResolver = this._create(type, resolveOptions);
|
|
this.cache2.set(ident, newResolver);
|
|
return newResolver;
|
|
}
|
|
|
|
_create(type, resolveOptions) {
|
|
const originalResolveOptions = Object.assign({}, resolveOptions);
|
|
resolveOptions = this.hooks.resolveOptions.for(type).call(resolveOptions);
|
|
const resolver = Factory.createResolver(resolveOptions);
|
|
if (!resolver) {
|
|
throw new Error("No resolver created");
|
|
}
|
|
/** @type {Map<Object, Resolver>} */
|
|
const childCache = new Map();
|
|
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);
|
|
return resolver;
|
|
}
|
|
};
|