init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    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 WasmChunkLoadingRuntimeModule = require("../wasm-sync/WasmChunkLoadingRuntimeModule");
 
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */
 
// TODO webpack 6 remove
 
const PLUGIN_NAME = "FetchCompileWasmPlugin";
 
/**
 * @typedef {Object} FetchCompileWasmPluginOptions
 * @property {boolean} [mangleImports] mangle imports
 */
 
class FetchCompileWasmPlugin {
    /**
     * @param {FetchCompileWasmPluginOptions} [options] options
     */
    constructor(options = {}) {
        this.options = options;
    }
 
    /**
     * 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 === "fetch";
            };
            /**
             * @param {string} path path to the wasm file
             * @returns {string} code to load the wasm file
             */
            const generateLoadBinaryCode = path =>
                `fetch(${RuntimeGlobals.publicPath} + ${path})`;
 
            compilation.hooks.runtimeRequirementInTree
                .for(RuntimeGlobals.ensureChunkHandlers)
                .tap(PLUGIN_NAME, (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);
                    set.add(RuntimeGlobals.publicPath);
                    compilation.addRuntimeModule(
                        chunk,
                        new WasmChunkLoadingRuntimeModule({
                            generateLoadBinaryCode,
                            supportsStreaming: true,
                            mangleImports: this.options.mangleImports,
                            runtimeRequirements: set
                        })
                    );
                });
        });
    }
}
 
module.exports = FetchCompileWasmPlugin;