112 lines
3.0 KiB
JavaScript
112 lines
3.0 KiB
JavaScript
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/*
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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 { WEBASSEMBLY_MODULE_TYPE_SYNC } = require("../ModuleTypeConstants");
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const RuntimeGlobals = require("../RuntimeGlobals");
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const Template = require("../Template");
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const WasmChunkLoadingRuntimeModule = require("../wasm-sync/WasmChunkLoadingRuntimeModule");
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../Compiler")} Compiler */
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/**
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* @typedef {object} ReadFileCompileWasmPluginOptions
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* @property {boolean} [mangleImports] mangle imports
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*/
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// TODO webpack 6 remove
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class ReadFileCompileWasmPlugin {
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/**
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* @param {ReadFileCompileWasmPluginOptions} [options] options object
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*/
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constructor(options = {}) {
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this.options = options;
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}
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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.thisCompilation.tap(
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"ReadFileCompileWasmPlugin",
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compilation => {
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const globalWasmLoading = compilation.outputOptions.wasmLoading;
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/**
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* @param {Chunk} chunk chunk
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* @returns {boolean} true, when wasm loading is enabled for the chunk
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*/
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const isEnabledForChunk = chunk => {
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const options = chunk.getEntryOptions();
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const wasmLoading =
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options && options.wasmLoading !== undefined
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? options.wasmLoading
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: globalWasmLoading;
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return wasmLoading === "async-node";
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};
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/**
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* @param {string} path path to wasm file
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* @returns {string} generated code to load the wasm file
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*/
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const generateLoadBinaryCode = path =>
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Template.asString([
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"new Promise(function (resolve, reject) {",
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Template.indent([
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"var { readFile } = require('fs');",
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"var { join } = require('path');",
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"",
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"try {",
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Template.indent([
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`readFile(join(__dirname, ${path}), function(err, buffer){`,
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Template.indent([
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"if (err) return reject(err);",
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"",
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"// Fake fetch response",
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"resolve({",
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Template.indent(["arrayBuffer() { return buffer; }"]),
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"});"
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]),
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"});"
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]),
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"} catch (err) { reject(err); }"
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]),
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"})"
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]);
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compilation.hooks.runtimeRequirementInTree
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.for(RuntimeGlobals.ensureChunkHandlers)
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.tap("ReadFileCompileWasmPlugin", (chunk, set) => {
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if (!isEnabledForChunk(chunk)) return;
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const chunkGraph = compilation.chunkGraph;
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if (
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!chunkGraph.hasModuleInGraph(
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chunk,
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m => m.type === WEBASSEMBLY_MODULE_TYPE_SYNC
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)
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) {
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return;
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}
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set.add(RuntimeGlobals.moduleCache);
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compilation.addRuntimeModule(
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chunk,
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new WasmChunkLoadingRuntimeModule({
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generateLoadBinaryCode,
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supportsStreaming: false,
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mangleImports: this.options.mangleImports,
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runtimeRequirements: set
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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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}
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module.exports = ReadFileCompileWasmPlugin;
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