vite.config.ts

import { defineConfig } from 'vite';
import wasm from 'vite-plugin-wasm';
import { resolve } from 'path';

// Library build config — used by `npm run build:js` and `npm run release`.
// NOT used for the demo dev server (that uses vite.config.demo.ts).
//
// Outputs:
//   dist/index.{mjs,cjs}         — main Nodebox API
//   dist/vite-plugin.{mjs,cjs}   — optional Vite integration
//   dist/middleware.{mjs,cjs}    — optional Express middleware
//   dist/*.d.ts                  — TypeScript declarations (via build:types)

export default defineConfig({
  plugins: [wasm()],
  build: {
    lib: {
      entry: {
        index: resolve(__dirname, 'js/src/index.ts'),
        'vite-plugin': resolve(__dirname, 'js/src/preview/vite-plugin.ts'),
        middleware: resolve(__dirname, 'js/src/preview/middleware.ts'),
      },
      formats: ['es', 'cjs'],
      fileName: (format, entryName) =>
        `${entryName}.${format === 'es' ? 'mjs' : 'cjs'}`,
    },
    rollupOptions: {
      // Mark peer/runtime deps as external — not bundled into dist.
      external: [
        'nodebox-core',
        /^nodebox-core\//,
        'vite',
        'esbuild-wasm',
        /^node:/,
        // Node.js built-in polyfill names (used as specifiers in require())
        'fs', 'path', 'http', 'https', 'url', 'crypto', 'stream',
        'os', 'net', 'tty', 'vm', 'util', 'assert', 'events',
        'querystring', 'string_decoder', 'timers', 'zlib', 'buffer',
        'child_process',
      ],
    },
    // Terser: maximum compression + strip all comments.
    // Mangle _camelCase private properties to reduce readability.
    minify: 'terser',
    terserOptions: {
      compress: {
        passes: 2,
        // Keep console.warn/error for runtime diagnostics; drop debug-only logs.
        pure_funcs: ['console.debug'],
      },
      mangle: {
        // Mangle properties starting with _lowercase (internal/private convention).
        properties: { regex: /^_[a-z]/ },
      },
      format: {
        // Strip all comments — no source hints in the published package.
        comments: false,
      },
    },
    // No source maps in the published package — prevents source reconstruction.
    sourcemap: false,
    outDir: 'dist',
    emptyOutDir: true,
  },
});