webpack/lib/bun/BunTargetPlugin.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author sheo13666q @sheo13666q
*/

"use strict";

const ExternalsPlugin = require("../ExternalsPlugin");
const { coreModules } = require("../node/nodeBuiltins");

/** @typedef {import("../Compiler")} Compiler */

// Bun exposes the node.js core modules; externalize them with the `node:`
// specifier (Bun resolves both forms) like the deno target.

// Bun's own built-in modules (`bun`, `bun:sqlite`, ...) are provided by the
// runtime, never bundled.
const BUN_BUILTINS = /^bun(?::|$)/;

class BunTargetPlugin {
	/**
	 * Applies the plugin by registering its hooks on the compiler.
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		new ExternalsPlugin(
			(dependency) =>
				dependency.category === "commonjs" ? "node-commonjs" : "module-import",
			({ request }, callback) => {
				if (!request) return callback();
				if (request.startsWith("node:") || BUN_BUILTINS.test(request)) {
					return callback(null, request);
				}
				if (coreModules.has(request)) return callback(null, `node:${request}`);
				callback();
			}
		).apply(compiler);
	}
}

module.exports = BunTargetPlugin;