Getting frontmatter from custom remarkPlugins

[RobbieTheWagner]

What version of astro are you using?

1.0.1

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

yarn

What operating system are you using?

Mac

Describe the Bug

It seems frontmatter is empty when defining remarkPlugins.

Setting arbitrary frontmatter is easy with remarkPlugins, but there seems to be no way to get existing frontmatter. For example, this will not work:

import authorData from './data/authors.mjs';

export function addAuthorRemarkPlugin() {
  return function (tree, post) {
    const author = authorData[post.data.astro.frontmatter.author];
    post.data.astro.frontmatter.author = author;
  }
}

Link to Minimal Reproducible Example

https://github.com/shipshapecode/website-astro

Participation

• I am willing to submit a pull request for this issue.

[bholmesdev]

Ah, third request I've seen for this! Definitely think this is worth implementing. Will make a PR soon 👍

[bholmesdev]

Marking as duplicate of this to track in one place #4429. Still on my todos!