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_ASYNC } = require("../ModuleTypeConstants");
const RuntimeGlobals = require("../RuntimeGlobals");
const AsyncWasmLoadingRuntimeModule = require("../wasm-async/AsyncWasmLoadingRuntimeModule");
 
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */
 
class FetchCompileAsyncWasmPlugin {
    /**
     * Apply the plugin
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        compiler.hooks.thisCompilation.tap(
            "FetchCompileAsyncWasmPlugin",
            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.instantiateWasm)
                    .tap("FetchCompileAsyncWasmPlugin", (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: true
                            })
                        );
                    });
            }
        );
    }
}
 
module.exports = FetchCompileAsyncWasmPlugin;