Bun loader for DLight

dlight-plugin.ts

import type { BunPlugin } from "bun";
import { transform } from "@babel/core";
import dlight, { type DLightOption } from "babel-preset-dlight";

export const dlightPlugin = (): BunPlugin => ({
  name: "bun-plugin-dlight",
  setup(build) {
    build.onLoad({ filter: /\.(view|model)\.[tj]s$/ }, async (args) => {
      const options: DLightOption = {};

      const code = await Bun.file(args.path).text();

      const result = transform(code, {
        babelrc: false,
        configFile: false,
        presets: [[dlight, options]],
        sourceMaps: true,
        filename: args.path,
      });

      if (!result || !result.code) {
        throw new Error(`Babel failed to process ${args.path}`);
      }

      return {
        contents: result.code,
        loader: "js",
      };
    });
  },
});