mirror of https://github.com/webpack/webpack.git
81 lines
2.2 KiB
JavaScript
81 lines
2.2 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 WebpackError = require("../WebpackError");
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const HarmonyImportDependency = require("../dependencies/HarmonyImportDependency");
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const { contextify } = require("../util/identifier");
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../NormalModule")} NormalModule */
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class InferAsyncModulesPlugin {
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/**
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* Apply the plugin
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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("InferAsyncModulesPlugin", compilation => {
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const asyncAwaitUnsupported =
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compilation.runtimeTemplate.supportsAsyncFunction() === false;
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const asyncReasons = [];
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const { moduleGraph } = compilation;
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compilation.hooks.finishModules.tap(
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"InferAsyncModulesPlugin",
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modules => {
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/** @type {Set<Module>} */
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const queue = new Set();
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for (const module of modules) {
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if (module.buildMeta && module.buildMeta.async) {
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queue.add(module);
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if (asyncAwaitUnsupported && "userRequest" in module) {
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asyncReasons.push(
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`- ${contextify(
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compiler.context,
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/** @type {NormalModule} */ (module).userRequest,
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compiler
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)} (${module.buildMeta.asyncReason || "unknown reason"})`
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);
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}
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}
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}
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for (const module of queue) {
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moduleGraph.setAsync(module);
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for (const [
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originModule,
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connections
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] of moduleGraph.getIncomingConnectionsByOriginModule(module)) {
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if (
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connections.some(
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c =>
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c.dependency instanceof HarmonyImportDependency &&
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c.isTargetActive(undefined)
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)
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) {
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queue.add(originModule);
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}
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}
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}
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if (asyncReasons.length) {
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const warning = new WebpackError(
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"Output environment does not support async/await"
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);
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warning.details = `List of async modules:\n${asyncReasons.join(
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"\n"
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)}`;
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compilation.warnings.push(warning);
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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 = InferAsyncModulesPlugin;
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