webpack.main.config.js

const path = require("path");
const glob = require("glob");
const webpack = require("webpack");
const webpackCommonConfig = require("./webpack.common.config");
require("dotenv").config();

module.exports =
  /** @param {import("webpack").Configuration} config */ function (config) {
    const isProd = config.mode === "production";

    const workers = glob
      .sync("./src/main/**/*.worker.ts")
      .map((filePath) => {
        const name = path.basename(filePath, path.extname(filePath));
        return [name, path.dirname(filePath).split("src/main/")[1], filePath];
      })
      .reduce((acc, [name, directoryPath, filePath]) => {
        acc[path.join(directoryPath, name)] = filePath;
        return acc;
      }, {});

    if (isProd) {
      for (const plugin of config.plugins) {
        if (plugin instanceof webpack.BannerPlugin) {
          plugin.options.exclude = /(preload|\.worker)\.js$/i;
        }
      }
    }

    config.entry = {
      ...config.entry,
      ...workers,
    };

    return webpackCommonConfig(config);
  };