pass current file as third argument?

[felixroos]

Hello, and thanks for creating this plugin! It was exactly what I needed. I found it through this comment
There was a little workaround required for my use case, and I thought it could be generally helpful.

I found myself needing to rewrite relative anchors to absolute ones, which only works when knowing the current path.
This is how I do it:

const base = '/';
function absoluteAnchors() {
  return (tree, file) => {
    const chunks = file.history[0].split('/src/pages/'); // file.history[0] is the file path
    const path = chunks[chunks.length - 1].slice(0, -4); // only path inside src/pages, without .mdx
    return rehypeUrls((url) => {
      if (!url.href.startsWith('#')) {
        return;
      }
      const absoluteUrl = base + path + url.href;
      // console.log(url.href + ' -> ', absoluteUrl);
      return absoluteUrl;
    })(tree);
  };
}

(I needed this because I am using a base href, which results in all relative anchor links pointing to the root path instead of the current page)

TLDR It would be handy if the function passed to the plugin would also pass a third parameter the current file, like

rehypeUrls((url, node, file) => /* ..*/);

I could also send a PR if you like

[brechtcs]

Sorry, this slipped through the cracks because I don't check Github as often as I used to.

It's been a while since I worked on any unified plugins, so the API is a bit hazy for me right now. If you already know how to implement it yourself though I'd be more than happy to accept a PR.