@shtse8/bun-plugin-dts

A plugin for Bun that generates TypeScript declaration files (.d.ts) during the bun build process.

Problem

Bun's built-in bundler (bun build) is incredibly fast, but it currently does not generate .d.ts files automatically. This makes it difficult to publish TypeScript libraries built with Bun, as consumers rely on these files for type checking and autocompletion.

@shtse8/bun-plugin-dts solves this by hooking into the build process and using the TypeScript Compiler API to generate the necessary declaration files alongside your JavaScript output.

Installation

bun add --dev @shtse8/bun-plugin-dts

You also need typescript installed, which is likely already in your project:

bun add --dev typescript

Usage

Import the plugin and add it to the plugins array in your Bun.build configuration.

Example build.ts:

import Bun from "bun";
import dts from "@shtse8/bun-plugin-dts"; // Import the plugin

await Bun.build({
    entrypoints: ["./src/index.ts"],
    outdir: "./dist",
    target: "bun", // Or your desired target
    plugins: [
        dts(), // Add the plugin here
    ],
    // ... other build options
});

console.log("Build complete!");

The plugin will automatically:

1. Find your tsconfig.json in the project root.
2. Read the entry points and output directory (outdir) from the Bun.build config.
3. Generate .d.ts files corresponding to your entry points within the specified outdir.

Configuration (Optional)

Currently, the plugin automatically detects settings from your tsconfig.json and Bun.build configuration. Explicit plugin options may be added in the future if needed.

Contributing

Contributions are welcome! Please feel free to open an issue or submit a pull request on the GitHub repository.

License

This project is licensed under the MIT License. See the LICENSE file for details.