@booru/vite-plugin-moleculer-runner

Vite Plugin for moleculer-esm-runner

Why

• This is created as a quick solution for problems I encountered during setting up esm typescript moleculer project. This was a quick and dirty solution which I later refined a bit as a node module.

What is this ?

• This is a plugin to easily run moleculer applications using moleculer-runner.
  • for further information check https://github.com/moleculerjs/moleculer repository
• This wraps around moleculer esm runner and use ViteDevServer HMR to easily reload the services.

Usage

• create vanilla vite project using npx create-vite@latest, Choose Vanilla + Typescript
• install runner as dev dependency
  • npm i -D @booru/vite-plugin-moleculer-runner
  • you may also need to install following to fully setup moleculer app
    • dependencies
      • moleculer
      • moleculer-repl
    • devDependencies
      • glob
      • dotenv
      • ts-node
• add vite.config.ts file with below content

import {defineConfig} from 'vite'
import {resolve} from 'path'
import {MoleculerRunner} from '@booru/vite-plugin-moleculer-runner'
import glob from 'glob'

export default defineConfig({
    plugins: [
        MoleculerRunner.init({})
    ],
    build: {
        ssr: true,
        target: 'ESNext',
        lib: {
            entry: [
                ...glob.sync("**/*.service.ts", { absolute: false, cwd: '.' }).map(o=>resolve(__dirname, o)),
                resolve(__dirname, 'moleculer.config.ts')
            ]
        },
        rollupOptions:{
            output:[
                {
                    dir: 'dist',
                    format: 'es',
                    preserveModules: false,
                    entryFileNames: '[name].mjs',
                }
            ]

        },
        copyPublicDir: false
    },
    resolve: {alias: {"src": resolve('src/')}},

})

• if required update tsconfig.json if required

{
  "compilerOptions": {
    "target": "ESNext",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "lib": ["ESNext"],
    "skipLibCheck": true,

    "moduleResolution": "Node",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,

    "esModuleInterop": true,
    "strict": true,
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "noFallthroughCasesInSwitch": true
  },
  "include": [
    "**.ts"
  ],
  "ts-node": {
    "esm": true,
    "experimentalSpecifierResolution": "node"
  },
  "exclude": ["node_modules"]
}

• Now you can run application in dev mode using npm run dev