effect-sugar-vite

Vite plugin and tsx loader for Effect-TS gen block syntax.

Installation

pnpm add -D effect-sugar-vite

Usage

Vite Plugin

// vite.config.ts
import { defineConfig } from 'vite'
import effectSugar from 'effect-sugar-vite'

export default defineConfig({
  plugins: [effectSugar()]
})

tsx Loader (Node.js)

pnpm add -D effect-sugar-vite esbuild

{
  "scripts": {
    "dev": "tsx --import effect-sugar-vite/register --watch src/index.ts"
  }
}

ESLint Preprocessor

// eslint.config.js
import effectSugarPreprocessor from 'effect-sugar-vite/eslint'

export default [
  {
    files: ['**/*.ts', '**/*.tsx'],
    processor: effectSugarPreprocessor
  }
]

Transformation

// Input
const program = gen {
  user <- getUser(id)
  let name = user.name.toUpperCase()
  return { user, name }
}

// Output
const program = Effect.gen(function* () {
  const user = yield* getUser(id)
  const name = user.name.toUpperCase()
  return { user, name }
})

Options

effectSugar({
  include: ['.ts', '.tsx'],           // File extensions (default: ['.ts', '.tsx', '.mts', '.cts'])
  exclude: [/node_modules/],          // Patterns to exclude
  sourcemap: true                     // Enable source maps (default: true)
})

API

import { transformSource, hasGenBlocks } from 'effect-sugar-vite/transform'

if (hasGenBlocks(source)) {
  const result = transformSource(source, 'filename.ts')
  console.log(result.code, result.map)
}

License

MIT