Replace the markdown parser with CommonMark

app/config/sculpin_kernel.yml

@@ -1,3 +1,6 @@
 sculpin_content_types:
     posts:
         enabled: false
+
+parameters:
+    twig.markdown.parser.class: 'App\Markdown\CommonMarkMarkdownParser'

app/src/Markdown/CommonMarkMarkdownParser.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Markdown;
+
+use League\CommonMark\CommonMarkConverter;
+use Opdavies\Sculpin\Bundle\TwigMarkdownBundle\Twig\SculpinTwigMarkdownParserInterface;
+
+class CommonMarkMarkdownParser implements SculpinTwigMarkdownParserInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function transform($text)
+    {
+        $converter = new CommonMarkConverter([
+            'html_input' => 'strip',
+            'allow_unsafe_links' => false,
+        ]);
+
+        return $converter->convertToHtml($text);
+    }
+}

composer.json

@@ -10,8 +10,9 @@
         }
     ],
     "require": {
-        "sculpin/sculpin": "^3.0",
-        "opdavies/sculpin-twig-markdown-bundle": "dev-markdown"
+        "league/commonmark": "^1.1",
+        "opdavies/sculpin-twig-markdown-bundle": "dev-markdown",
+        "sculpin/sculpin": "^3.0"
     },
     "scripts": {
         "dev": "composer run-script generate",
@@ -26,5 +27,10 @@
         "branch-alias": {
             "dev-master": "2.1-dev"
         }
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "app/src"
+        }
     }
 }

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "3173aca8bf957af0cd164f430a6bfb4a",
+    "content-hash": "231dd3f007036b8d3bc7bd9b688a71b6",
     "packages": [
         {
             "name": "dflydev/ant-path-matcher",
@@ -446,6 +446,77 @@
             ],
             "time": "2017-07-23T21:35:13+00:00"
         },
+        {
+            "name": "league/commonmark",
+            "version": "1.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/thephpleague/commonmark.git",
+                "reference": "d927c05e9a391688b1e59a606c97465a90531789"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/thephpleague/commonmark/zipball/d927c05e9a391688b1e59a606c97465a90531789",
+                "reference": "d927c05e9a391688b1e59a606c97465a90531789",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": "^7.1"
+            },
+            "replace": {
+                "colinodell/commonmark-php": "*"
+            },
+            "require-dev": {
+                "cebe/markdown": "~1.0",
+                "commonmark/commonmark.js": "0.29.0",
+                "erusev/parsedown": "~1.0",
+                "ext-json": "*",
+                "michelf/php-markdown": "~1.4",
+                "mikehaertl/php-shellcommand": "^1.4",
+                "phpstan/phpstan-shim": "^0.11.5",
+                "phpunit/phpunit": "^7.5",
+                "scrutinizer/ocular": "^1.5",
+                "symfony/finder": "^4.2"
+            },
+            "suggest": {
+                "league/commonmark-extras": "Library of useful extensions including smart punctuation"
+            },
+            "bin": [
+                "bin/commonmark"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "League\\CommonMark\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Colin O'Dell",
+                    "email": "colinodell@gmail.com",
+                    "homepage": "https://www.colinodell.com",
+                    "role": "Lead Developer"
+                }
+            ],
+            "description": "PHP Markdown parser based on the CommonMark spec",
+            "homepage": "https://commonmark.thephpleague.com",
+            "keywords": [
+                "commonmark",
+                "markdown",
+                "parser"
+            ],
+            "time": "2019-10-31T13:30:15+00:00"
+        },
         {
             "name": "michelf/php-markdown",
             "version": "1.8.0",