export config types for Rewrite / Redirect / Header

[stefanprobst]

Goals

being able to import types for Rewrite / Redirect / Header in next.config.ts, instead of getting them via

Awaited<ReturnType<NonNullable<Config["headers"]>>>
Awaited<ReturnType<NonNullable<Config["redirects"]>>>
Awaited<ReturnType<NonNullable<Config["rewrites"]>>>

or importing from import { Header, Redirect, Rewrite } from "next/dist/lib/load-custom-routes";

Non-Goals

No response

Background

i find that in next.config.ts i often write something like this:

import type { NextConfig as Config } from "next";

const config: Config = {
  redirects() {
    const redirects: Awaited<ReturnType<NonNullable<Config["redirects"]>>> = [
      /* ... */
    ];

    if (...) redirects.push(..)

    return Promise.resolve(redirects);
  },
};

export default config;

Proposal

export Rewrite / Redirect / Header types as part of public api