source: trip-planner-front/node_modules/webpack/lib/wasm-sync/WasmFinalizeExportsPlugin.js

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

"use strict";

const formatLocation = require("../formatLocation");
const UnsupportedWebAssemblyFeatureError = require("./UnsupportedWebAssemblyFeatureError");

/** @typedef {import("../Compiler")} Compiler */

class WasmFinalizeExportsPlugin {
        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.compilation.tap("WasmFinalizeExportsPlugin", compilation => {
                        compilation.hooks.finishModules.tap(
                                "WasmFinalizeExportsPlugin",
                                modules => {
                                        for (const module of modules) {
                                                // 1. if a WebAssembly module
                                                if (module.type.startsWith("webassembly") === true) {
                                                        const jsIncompatibleExports =
                                                                module.buildMeta.jsIncompatibleExports;

                                                        if (jsIncompatibleExports === undefined) {
                                                                continue;
                                                        }

                                                        for (const connection of compilation.moduleGraph.getIncomingConnections(
                                                                module
                                                        )) {
                                                                // 2. is active and referenced by a non-WebAssembly module
                                                                if (
                                                                        connection.isTargetActive(undefined) &&
                                                                        connection.originModule.type.startsWith("webassembly") ===
                                                                                false
                                                                ) {
                                                                        const referencedExports =
                                                                                compilation.getDependencyReferencedExports(
                                                                                        connection.dependency,
                                                                                        undefined
                                                                                );

                                                                        for (const info of referencedExports) {
                                                                                const names = Array.isArray(info) ? info : info.name;
                                                                                if (names.length === 0) continue;
                                                                                const name = names[0];
                                                                                if (typeof name === "object") continue;
                                                                                // 3. and uses a func with an incompatible JS signature
                                                                                if (
                                                                                        Object.prototype.hasOwnProperty.call(
                                                                                                jsIncompatibleExports,
                                                                                                name
                                                                                        )
                                                                                ) {
                                                                                        // 4. error
                                                                                        const error = new UnsupportedWebAssemblyFeatureError(
                                                                                                `Export "${name}" with ${jsIncompatibleExports[name]} can only be used for direct wasm to wasm dependencies\n` +
                                                                                                        `It's used from ${connection.originModule.readableIdentifier(
                                                                                                                compilation.requestShortener
                                                                                                        )} at ${formatLocation(connection.dependency.loc)}.`
                                                                                        );
                                                                                        error.module = module;
                                                                                        compilation.errors.push(error);
                                                                                }
                                                                        }
                                                                }
                                                        }
                                                }
                                        }
                                }
                        );
                });
        }
}

module.exports = WasmFinalizeExportsPlugin;