CommonMark from Clojure + EDN front matter https://mrmcc3.github.io/blog/posts/commonmark-in-clojure/

demo.clj

(ns demo
  (:import
    (org.commonmark.parser Parser)
    (org.commonmark.renderer.html HtmlRenderer)))

(def parser (.build (Parser/builder)))
(def renderer (.build (HtmlRenderer/builder)))

(defn -main [input]
  (->> (slurp input)
       (.parse parser)
       (.render renderer)
       (println)))

demo2.clj

(ns demo2
  (:require
    [clojure.edn :as edn]
    [clojure.pprint :refer [pprint]])
  (:import
    (org.commonmark.parser Parser)
    (org.commonmark.node FencedCodeBlock)
    (org.commonmark.renderer.html HtmlRenderer)))

(defn extract-meta! [doc]
  (let [node (.getFirstChild doc)]
    (when (and (instance? FencedCodeBlock node)
               (= (.getInfo node) "clojure"))
      (.unlink node)
      (edn/read-string (.getLiteral node)))))

(def parser (.build (Parser/builder)))
(def renderer (.build (HtmlRenderer/builder)))

(defn -main [input]
  (let [doc   (.parse parser (slurp input))
        meta  (extract-meta! doc)
        html  (.render renderer doc)]
    (pprint (assoc meta :html html))))

deps.edn

{:paths ["."]
 :deps {org.clojure/clojure                 {:mvn/version "1.9.0"}
        com.atlassian.commonmark/commonmark {:mvn/version "0.11.0"}}}

edn.md

{:title "EDN Frontmatter Example"
 :published #inst "2018-03-08"}

This is the edn frontmatter example

Runnable examples from https://mrmcc3.github.io/blog/posts/commonmark-in-clojure/

Basic markdown processing

clj -Sdeps '{:deps {mrmcc3/gist-9beda43069a188bd9a7646aa2fa1005e {:git/url "https://gist.github.com/mrmcc3/9beda43069a188bd9a7646aa2fa1005e" :sha "c7b61caa2bbbb551865e113f499347b373cbbdbd"}}}' -m demo https://gist.githubusercontent.com/mrmcc3/9beda43069a188bd9a7646aa2fa1005e/raw/c7b61caa2bbbb551865e113f499347b373cbbdbd/edn.md

EDN front matter trick

clj -Sdeps '{:deps {mrmcc3/gist-9beda43069a188bd9a7646aa2fa1005e {:git/url "https://gist.github.com/mrmcc3/9beda43069a188bd9a7646aa2fa1005e" :sha "c7b61caa2bbbb551865e113f499347b373cbbdbd"}}}' -m demo2 https://gist.githubusercontent.com/mrmcc3/9beda43069a188bd9a7646aa2fa1005e/raw/c7b61caa2bbbb551865e113f499347b373cbbdbd/edn.md