const webpack = require('webpack');
const nodeExternals = require('webpack-node-externals');

module.exports = function (options) {
  return {
    ...options,
    entry: ['./src/main.ts'],
    output: {
      ...options.output,
      filename: 'main.cjs',
    },
    target: 'node',
    externals: [nodeExternals()],
    optimization: {
      splitChunks: false,
      runtimeChunk: false,
    },
    resolve: {
      ...options.resolve,
      extensionAlias: {
        '.js': ['.ts', '.js'],
      },
    },
    plugins: [
      ...options.plugins,
      new webpack.optimize.LimitChunkCountPlugin({
        maxChunks: 1,
      }),
    ],
  };
};