1 files changed, 111 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/node/ReadFileCompileWasmPlugin.js b/node_modules/webpack/lib/node/ReadFileCompileWasmPlugin.js
new file mode 100644
index 00000000..0a463994
--- /dev/null
+++ b/node_modules/webpack/lib/node/ReadFileCompileWasmPlugin.js
@@ -0,0 +1,111 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { WEBASSEMBLY_MODULE_TYPE_SYNC } = require("../ModuleTypeConstants");
+const RuntimeGlobals = require("../RuntimeGlobals");
+const Template = require("../Template");
+const WasmChunkLoadingRuntimeModule = require("../wasm-sync/WasmChunkLoadingRuntimeModule");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compiler")} Compiler */
+
+/**
+ * @typedef {object} ReadFileCompileWasmPluginOptions
+ * @property {boolean} [mangleImports] mangle imports
+ */
+
+// TODO webpack 6 remove
+
+class ReadFileCompileWasmPlugin {
+	/**
+	 * @param {ReadFileCompileWasmPluginOptions} [options] options object
+	 */
+	constructor(options = {}) {
+		this.options = options;
+	}
+
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.thisCompilation.tap(
+			"ReadFileCompileWasmPlugin",
+			compilation => {
+				const globalWasmLoading = compilation.outputOptions.wasmLoading;
+				/**
+				 * @param {Chunk} chunk chunk
+				 * @returns {boolean} true, when 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 === "async-node";
+				};
+				/**
+				 * @param {string} path path to wasm file
+				 * @returns {string} generated code to load the wasm file
+				 */
+				const generateLoadBinaryCode = path =>
+					Template.asString([
+						"new Promise(function (resolve, reject) {",
+						Template.indent([
+							"var { readFile } = require('fs');",
+							"var { join } = require('path');",
+							"",
+							"try {",
+							Template.indent([
+								`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.ensureChunkHandlers)
+					.tap("ReadFileCompileWasmPlugin", (chunk, set) => {
+						if (!isEnabledForChunk(chunk)) return;
+						const chunkGraph = compilation.chunkGraph;
+						if (
+							!chunkGraph.hasModuleInGraph(
+								chunk,
+								m => m.type === WEBASSEMBLY_MODULE_TYPE_SYNC
+							)
+						) {
+							return;
+						}
+						set.add(RuntimeGlobals.moduleCache);
+						compilation.addRuntimeModule(
+							chunk,
+							new WasmChunkLoadingRuntimeModule({
+								generateLoadBinaryCode,
+								supportsStreaming: false,
+								mangleImports: this.options.mangleImports,
+								runtimeRequirements: set
+							})
+						);
+					});
+			}
+		);
+	}
+}
+
+module.exports = ReadFileCompileWasmPlugin;