How to "re" parse AST to markdown?

[icefery]

Question

How to "re" parse AST to markdown?

I'm sorry that I am not very good at English, to find some helpful information from issues seems to be difficult for me.

Context

I want to for-each all the image node and migrate images to a new path, which means steps as follow:

1. Parse markdown to AST
2. Change AST
3. Parse AST to markdown

import { Parser } from 'commonmark'

const md = `![](./image/1.jpg)`
const walker = parser.parse(md).walker()

let event = null
while ((event = walker.next())) {
  if (event.entering && event.node.type === 'image') {
    // move
    const filepath = mv(event.node.destination)
    // change
    event.node.destination = filepath
  }
}

// TODO: How to "re" parse AST to markdown?

[jgm]

See #83 (open issue).