source: trip-planner-front/node_modules/webpack/lib/async-modules/InferAsyncModulesPlugin.js

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

"use strict";

const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency");

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

class InferAsyncModulesPlugin {
        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.compilation.tap("InferAsyncModulesPlugin", compilation => {
                        const { moduleGraph } = compilation;
                        compilation.hooks.finishModules.tap(
                                "InferAsyncModulesPlugin",
                                modules => {
                                        /** @type {Set<Module>} */
                                        const queue = new Set();
                                        for (const module of modules) {
                                                if (module.buildMeta && module.buildMeta.async) {
                                                        queue.add(module);
                                                }
                                        }
                                        for (const module of queue) {
                                                moduleGraph.setAsync(module);
                                                for (const [
                                                        originModule,
                                                        connections
                                                ] of moduleGraph.getIncomingConnectionsByOriginModule(module)) {
                                                        if (
                                                                connections.some(
                                                                        c =>
                                                                                c.dependency instanceof HarmonyImportDependency &&
                                                                                c.isTargetActive(undefined)
                                                                )
                                                        ) {
                                                                queue.add(originModule);
                                                        }
                                                }
                                        }
                                }
                        );
                });
        }
}

module.exports = InferAsyncModulesPlugin;