1 files changed, 118 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/node/ReadFileCompileAsyncWasmPlugin.js b/node_modules/webpack/lib/node/ReadFileCompileAsyncWasmPlugin.js
new file mode 100644
index 00000000..61ab8ff0
--- /dev/null
+++ b/node_modules/webpack/lib/node/ReadFileCompileAsyncWasmPlugin.js
@@ -0,0 +1,118 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"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 */
+
+class ReadFileCompileAsyncWasmPlugin {
+	constructor({ type = "async-node", import: useImport = false } = {}) {
+		this._type = type;
+		this._import = useImport;
+	}
+
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.thisCompilation.tap(
+			"ReadFileCompileAsyncWasmPlugin",
+			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 === this._type;
+				};
+				const { importMetaName } = compilation.outputOptions;
+				/**
+				 * @type {(path: string) => string}
+				 */
+				const generateLoadBinaryCode = this._import
+					? path =>
+							Template.asString([
+								"Promise.all([import('fs'), import('url')]).then(([{ readFile }, { URL }]) => new Promise((resolve, reject) => {",
+								Template.indent([
+									`readFile(new URL(${path}, ${importMetaName}.url), (err, buffer) => {`,
+									Template.indent([
+										"if (err) return reject(err);",
+										"",
+										"// Fake fetch response",
+										"resolve({",
+										Template.indent(["arrayBuffer() { return buffer; }"]),
+										"});"
+									]),
+									"});"
+								]),
+								"}))"
+							])
+					: path =>
+							Template.asString([
+								"new Promise(function (resolve, reject) {",
+								Template.indent([
+									"try {",
+									Template.indent([
+										"var { readFile } = require('fs');",
+										"var { join } = require('path');",
+										"",
+										`readFile(join(__dirname, ${path}), function(err, buffer){`,
+										Template.indent([
+											"if (err) return reject(err);",
+											"",
+											"// Fake fetch response",
+											"resolve({",
+											Template.indent(["arrayBuffer() { return buffer; }"]),
+											"});"
+										]),
+										"});"
+									]),
+									"} catch (err) { reject(err); }"
+								]),
+								"})"
+							]);
+
+				compilation.hooks.runtimeRequirementInTree
+					.for(RuntimeGlobals.instantiateWasm)
+					.tap("ReadFileCompileAsyncWasmPlugin", (chunk, set) => {
+						if (!isEnabledForChunk(chunk)) return;
+						const chunkGraph = compilation.chunkGraph;
+						if (
+							!chunkGraph.hasModuleInGraph(
+								chunk,
+								m => m.type === WEBASSEMBLY_MODULE_TYPE_ASYNC
+							)
+						) {
+							return;
+						}
+						set.add(RuntimeGlobals.publicPath);
+						compilation.addRuntimeModule(
+							chunk,
+							new AsyncWasmLoadingRuntimeModule({
+								generateLoadBinaryCode,
+								supportsStreaming: false
+							})
+						);
+					});
+			}
+		);
+	}
+}
+
+module.exports = ReadFileCompileAsyncWasmPlugin;