source: frontend/node_modules/webpack/lib/wasm-sync/WebAssemblyUtils.js

/*
        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 */

/**
 * Defines the used wasm dependency type used by this module.
 * @typedef {object} UsedWasmDependency
 * @property {WebAssemblyImportDependency} dependency the dependency
 * @property {string} name the export name
 * @property {string} module the module name
 */

const MANGLED_MODULE = "a";

/**
 * Gets used dependencies.
 * @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;
};

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