Script: Get post as Markdown via Ghost Admin API

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I store the primary versions of all my posts locally as versioned markdown files, that I past into Ghost when I’m ready to publish. The Ghost editor has gotten so nice, I often want to use it for drafting posts. However, there’s no way to copy-and-paste the formatting out of the editor into a Markdown file.

I looked around and couldn’t find any existing scripts to get post markdown by ID, so I wrote a little script to fetch the content of a post by ID, and then convert it with Pandoc, and thought I’d share it in case it’s useful for other people:

//  First:
//      npm install @tryghost/admin-api
//  Run with:
//      node get-post-as-markdown.js "POSTID" https://blah.ghost.io "ADMIN_API_KEY" | pandoc -f html+smart -t markdown-smart

if (process.argv.length < 4) {
    console.error('Missing an argument');
    process.exit(1);
}

const postId = process.argv[2];
const url = process.argv[3];
const key = process.argv[4];

const GhostAdminAPI = require('@tryghost/admin-api');
const api = new GhostAdminAPI({
    url: url,
    key: key,
    version: 'v6.8'
});

api.posts.read({id: postId}, {formats: ['html']})
    .then((post) => {
            console.log("<h1>"+post.title+"</h1>")
            console.log("<h2>"+post.excerpt+"</h2>")
            console.log(""+post.slug+"")
            console.log(post.html);
    })
    .catch((err) => {
        console.error(err);
    });

Run it with:

node get-post-as-markdown.js "POSTID" https://blah.ghost.io "ADMIN_API_KEY" | pandoc -f html+smart -t markdown-smart --wrap="preserve"

or

node get-post-as-markdown.js "POSTID" https://blah.ghost.io "ADMIN_API_KEY" | pandoc -f html+smart -t markdown-smart --wrap="preserve" -o "My Output Filename.md"
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Best way to export Ghost story to markdown?
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Additional information about dependencies and usage here:

(My previous post is past the editing window.)