mirror of https://github.com/webpack/webpack.git
77 lines
1.9 KiB
JavaScript
77 lines
1.9 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 RequestShortener = require("../RequestShortener");
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const createHash = require("../util/createHash");
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../Module")} Module */
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const getHash = str => {
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const hash = createHash("md4");
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hash.update(str);
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return hash.digest("hex").substr(0, 4);
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};
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class NamedModuleIdsPlugin {
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constructor(options) {
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this.options = options || {};
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}
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/**
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* @param {Compiler} compiler the compiler instance
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* @returns {void}
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*/
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apply(compiler) {
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compiler.hooks.compilation.tap("NamedModuleIdsPlugin", compilation => {
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compilation.hooks.beforeModuleIds.tap("NamedModuleIdsPlugin", modules => {
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const chunkGraph = compilation.chunkGraph;
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const context = this.options.context
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? this.options.context
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: compiler.context;
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const requestShortener = this.options.context
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? new RequestShortener(this.options.context)
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: compilation.requestShortener;
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/** @type {Map<string, Module[]>} */
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const nameToModules = new Map();
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for (const module of modules) {
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if (chunkGraph.getNumberOfModuleChunks(module) === 0) continue;
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const moduleId = chunkGraph.getModuleId(module);
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if (moduleId === null) {
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const id = module.libIdent({ context }) || "";
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let array = nameToModules.get(id);
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if (array === undefined) {
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array = [];
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nameToModules.set(id, array);
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}
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array.push(module);
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}
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}
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for (const [id, modules] of nameToModules) {
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if (modules.length > 1 || !id) {
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for (const module of modules) {
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chunkGraph.setModuleId(
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module,
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`${id}?${getHash(
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requestShortener.shorten(module.identifier())
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)}`
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);
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}
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} else {
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chunkGraph.setModuleId(modules[0], id);
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}
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}
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});
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});
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}
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}
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module.exports = NamedModuleIdsPlugin;
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