Support for Front Matter?

I have a blog with markdown files generated by Jekyll. They use Markdown files that has a metadata block on top that contains yaml. Is this something that mistune would be willing to support? Jekyll is a very common blog engine, so I think it would be useful to many!

---
id: 29
title: How this website was built
date: 2005-12-20T00:00:36
categories:
  - CSS
---
Hi there early readers!

[quantology]

For posterity, @karlcow 's snippet above is missing a line; the full version is here: https://github.com/lepture/mistune-contrib/blob/master/mistune_contrib/meta.py

@EmilStenstrom let me know if you ended up with a gist of the above, I’m playing around with something similar

[x2f]

In case it helps other people interested in YAML frontmatter processing: consider using https://github.com/eyeseast/python-frontmatter.

(To clarify, this post does not suggest to change mistune. A user of mistune can use python-frontmatter on the file before invoking mistune.)

Here is a simple example:

import mistune, frontmatter
with open("text.md", "r") as f:
    obj = frontmatter.load(f)
    html = mistune.html(obj.content)
    with open("text.html", "w") as of:
        of.write(html)

Where text.md is something like this:

---
title: Text Title
---
# Some Title
some text