first commit

app_vue/node_modules/webpack/lib/wasm-async/UniversalCompileAsyncWasmPlugin.js

@@ -0,0 +1,107 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Alexander Akait @alexander-akait
+*/
+
+"use strict";
+
+const { WEBASSEMBLY_MODULE_TYPE_ASYNC } = require("../ModuleTypeConstants");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const Template = require("../Template");
+const AsyncWasmLoadingRuntimeModule = require("../wasm-async/AsyncWasmLoadingRuntimeModule");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compiler")} Compiler */
+
+const PLUGIN_NAME = "UniversalCompileAsyncWasmPlugin";
+
+class UniversalCompileAsyncWasmPlugin {
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.thisCompilation.tap(PLUGIN_NAME, compilation => {
+			const globalWasmLoading = compilation.outputOptions.wasmLoading;
+			/**
+			 * @param {Chunk} chunk chunk
+			 * @returns {boolean} true, if wasm loading is enabled for the chunk
+			 */
+			const isEnabledForChunk = chunk => {
+				const options = chunk.getEntryOptions();
+				const wasmLoading =
+					options && options.wasmLoading !== undefined
+						? options.wasmLoading
+						: globalWasmLoading;
+				return wasmLoading === "universal";
+			};
+			const generateBeforeInstantiateStreaming = () =>
+				Template.asString([
+					"if (!useFetch) {",
+					Template.indent(["return fallback();"]),
+					"}"
+				]);
+			/**
+			 * @param {string} path path
+			 * @returns {string} code
+			 */
+			const generateBeforeLoadBinaryCode = path =>
+				Template.asString([
+					"var useFetch = typeof document !== 'undefined' || typeof self !== 'undefined';",
+					`var wasmUrl = ${path};`
+				]);
+			/**
+			 * @type {(path: string) => string}
+			 */
+			const generateLoadBinaryCode = () =>
+				Template.asString([
+					"(useFetch",
+					Template.indent([
+						`? fetch(new URL(wasmUrl, ${compilation.outputOptions.importMetaName}.url))`
+					]),
+					Template.indent([
+						": Promise.all([import('fs'), import('url')]).then(([{ readFile }, { URL }]) => new Promise((resolve, reject) => {",
+						Template.indent([
+							`readFile(new URL(wasmUrl, ${compilation.outputOptions.importMetaName}.url), (err, buffer) => {`,
+							Template.indent([
+								"if (err) return reject(err);",
+								"",
+								"// Fake fetch response",
+								"resolve({",
+								Template.indent(["arrayBuffer() { return buffer; }"]),
+								"});"
+							]),
+							"});"
+						]),
+						"})))"
+					])
+				]);
+
+			compilation.hooks.runtimeRequirementInTree
+				.for(RuntimeGlobals.instantiateWasm)
+				.tap(PLUGIN_NAME, (chunk, set, { chunkGraph }) => {
+					if (!isEnabledForChunk(chunk)) return;
+					if (
+						!chunkGraph.hasModuleInGraph(
+							chunk,
+							m => m.type === WEBASSEMBLY_MODULE_TYPE_ASYNC
+						)
+					) {
+						return;
+					}
+					compilation.addRuntimeModule(
+						chunk,
+						new AsyncWasmLoadingRuntimeModule({
+							generateBeforeLoadBinaryCode,
+							generateLoadBinaryCode,
+							generateBeforeInstantiateStreaming,
+							supportsStreaming: true
+						})
+					);
+				});
+		});
+	}
+}
+
+module.exports = UniversalCompileAsyncWasmPlugin;