package.lib.wasm-sync.WebAssemblyUtils.js Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of webpack Show documentation

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

The newest version!

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const Template = require("../Template");
const WebAssemblyImportDependency = require("../dependencies/WebAssemblyImportDependency");

/** @typedef {import("../Module")} Module */
/** @typedef {import("../ModuleGraph")} ModuleGraph */

/**
 * @typedef {object} UsedWasmDependency
 * @property {WebAssemblyImportDependency} dependency the dependency
 * @property {string} name the export name
 * @property {string} module the module name
 */

const MANGLED_MODULE = "a";

/**
 * @param {ModuleGraph} moduleGraph the module graph
 * @param {Module} module the module
 * @param {boolean | undefined} mangle mangle module and export names
 * @returns {UsedWasmDependency[]} used dependencies and (mangled) name
 */
const getUsedDependencies = (moduleGraph, module, mangle) => {
	/** @type {UsedWasmDependency[]} */
	const array = [];
	let importIndex = 0;
	for (const dep of module.dependencies) {
		if (dep instanceof WebAssemblyImportDependency) {
			if (
				dep.description.type === "GlobalType" ||
				moduleGraph.getModule(dep) === null
			) {
				continue;
			}

			const exportName = dep.name;
			// TODO add the following 3 lines when removing of ModuleExport is possible
			// const importedModule = moduleGraph.getModule(dep);
			// const usedName = importedModule && moduleGraph.getExportsInfo(importedModule).getUsedName(exportName, runtime);
			// if (usedName !== false) {
			if (mangle) {
				array.push({
					dependency: dep,
					name: Template.numberToIdentifier(importIndex++),
					module: MANGLED_MODULE
				});
			} else {
				array.push({
					dependency: dep,
					name: exportName,
					module: dep.request
				});
			}
		}
	}
	return array;
};

exports.getUsedDependencies = getUsedDependencies;
exports.MANGLED_MODULE = MANGLED_MODULE;