vite-plugin-melange

A Vite plugin for Melange.

Features

• Compile Melange source files as part of the build
• Show errors on the commandline and in the browser overlay
• HMR (hot module replacement) with Melange source filenames as module names

Usage

npm install --save-dev vite-plugin-melange

vite.config.js:

import { defineConfig } from "vite";
import melangePlugin from "vite-plugin-melange";

export default defineConfig({
  plugins: [
    melangePlugin({
      buildCommand: "opam exec -- dune build",
      watchCommand: "opam exec -- dune build --watch",
    }),
  ]
});

Options

• buildCommand: (required) Dune build command. For instance: opam exec -- dune build
• watchCommand: (required) Dune watch command. For instance: opam exec -- dune build --watch
• buildContext: (default: "default") Dune build context. The default corresponds to Dune's default
• emitDir: (default: ".") Directory (relative to Vite root) where the melange.emit stanza is located. It defaults to the current directory, which is the recommended location
• buildTarget: (default: "output") target field of the melange.emit stanza. It defines the directory where the JavaScript artifacts will be placed
• duneDir: (default: ".") Directory (relative to Vite root) where Dune is running (can be used for instance if dune-project is in the parent directory). You may also need to add it to server.fs.allow.

Build

npm install
npm run build