build.config.ts

import { resolve } from "node:path";
import { defineBuildConfig } from "unbuild";

export default defineBuildConfig({
  entries: ["src/index", "src/helpers"],
  externals: ["@babel/types"],
  declaration: true,
  rollup: {
    emitCJS: true,
    inlineDependencies: true,
    dts: {
      respectExternal: true,
    },
  },
  alias: {
    "source-map": "source-map-js",

    recast: resolve(__dirname, "vendor/recast/main.ts"),

    "ast-types": resolve(__dirname, "vendor/ast-types/src/main.ts"),
  },
  hooks: {
    "rollup:dts:options": (ctx, options) => {
      // @ts-expect-error filter out commonjs plugin in dts build
      options.plugins = options.plugins.filter((plugin) => {
        return plugin && plugin.name !== "commonjs";
      });
    },
  },
});