在 Electron 应用程序中，使用 webpack/electron-builder 到 package 后，在 worker_threads 提示 MODULE_NOT_FOUND 中需要第三方模块

Question

ENV:

• Electron: v11.0.3
• Node: v14.15.1
• OS: win10 2020 x64

package.json - build

"build":{
  "productName": "myapp",
  "directories": {
    "output": "build"
  },
  "files": [
    "dist/electron/**/*"
  ]
}

Webpack.json

{
    entry: {
      main: path.join(__dirname, '../src/main/index.js')
    },
    externals: [
      ...Object.keys(dependencies || {})
    ],
    module: {
      rules: [
        {
          test: /\.js$/,
          use: 'babel-loader',
          exclude: /node_modules/
        },
        {
          test: /\.node$/,
          use: 'node-loader'
        }
      ]
    },
    node: {
      __dirname: process.env.NODE_ENV !== 'production',
      __filename: process.env.NODE_ENV !== 'production'
    },
    output: {
      filename: '[name].js',
      libraryTarget: 'commonjs2',
      path: path.join(__dirname, '../dist/electron')
    },
    plugins: [
      new webpack.ExternalsPlugin("commonjs", ["node-hid"])
    ],
    resolve: {
      extensions: ['.js', '.json', '.node']
    },
    target: 'electron-main'
  }

index.js

const { Worker } = require('worker_threads');
const worker = new Worker(`const HID = require("node-hid");console.log("hello");`, { eval:true });
worker.on('error', (err) => {
    console.log('worker error:',err);
});

The above code can output "hello" normally when running in the development environment, but when I run it after packaging it will output the following error:

worker error:
{code: "MODULE_NOT_FOUND", requireStack: ["C:\Users\user\AppData\Local\Programs\myapp\[worker eval]"]}

Should I use asarUnpack related configuration?

Answer 1

In the end I used asarUnpack to solve this problem:

index.js

const { Worker } = require('worker_threads');
const worker = new Worker(`
    const path = require("path");
    function dynamicallyRequire(moduleName) {
        let modulePath = getNodeModulesPath(moduleName);
        let module = require(modulePath);
        return module;
    }
    function getNodeModulesPath(moduleName) {
        return workerData.env === 'development' ? moduleName : path.join(process.cwd(), 'resources\\app.asar.unpacked\\node_modules\\' + moduleName);
    }
    const HID = dynamicallyRequire("node-hid");
    console.log("hello");
`, { eval:true, workerData: { env: process.env.NODE_ENV }});
worker.on('error', (err) => {
    console.log('worker error:',err);
});

package.json --> build --> asarUnpack

"asarUnpack": [
  "./node_modules/node-hid/**/*",
  "./node_modules/node-addon-api/**/*",
  "./node_modules/bindings/**/*",
  "./node_modules/file-uri-to-path/**/*"
]

It is worth mentioning that the dependencies of node-hid also need to be included, such as bindings , node-addon-api , file-uri-to-path