Microservices multi-config

microservice-webpack.config.ts

// Somewhere in microservice folder
// Can be used to create a bundle for this specific microservice

import { resolve } from 'path';
import * as webpack from 'webpack';

import config, { Env } from '../../webpack.config';

export default (env: Env = {}): webpack.Configuration => {
  env.BUNDLE_FOLDER = resolve(__dirname, 'bin');

  const localConfig: webpack.Configuration = {
    // Override all entries of the root configuration
    // with single entry of current microservice
    entry: {
      cache: './src/cache/index.ts'
    }
  };

  return { ...config(env), ...localConfig };
};

webpack.config.ts

// Main config, at the root of the project
// Used to generate bundles for each of the microservice

import * as CleanWebpackPlugin from 'clean-webpack-plugin';
import { resolve } from 'path';
import * as webpack from 'webpack';

export interface Env {
  NODE_ENV?: string;
  BUNDLE_FOLDER?: string;
}

export default ({
  NODE_ENV = 'dev',
  BUNDLE_FOLDER = resolve(__dirname, 'bin')
}: Env = {}): webpack.Configuration => {
  const TS_CONFIG_FILE = `tsconfig.${NODE_ENV}.json`;

  const defaultConfig: webpack.Configuration = {
    entry: {
      // Add microservices here
      api: './src/api/index.ts',
      cache: './src/cache/index.ts'
    },
    plugins: [
      new CleanWebpackPlugin([BUNDLE_FOLDER])
    ],
    output: {
      libraryTarget: 'commonjs',
      path: BUNDLE_FOLDER,
      filename: '[name]/bundle.js'
    }
  };

  return defaultConfig;
};