web/lukegbcom: install rehype-toc and rehype-slug, and add "nix" syntax highlighting

web/lukegbcom/lib/posts.js

@@ -1,21 +1,28 @@
+
 import fs from 'fs'
 import path from 'path'
 
 import matter from 'gray-matter'
 
-import { unified } from 'unified'
-import remarkParse from 'remark-parse'
 import remarkGfm from 'remark-gfm'
-import remarkRehype from 'remark-rehype'
 import rehypeHighlight from 'rehype-highlight'
-import rehypeStringify from 'rehype-stringify'
+import rehypeSlug from 'rehype-slug'
+import remarkToc from 'remark-toc'
+
+import nix from 'highlight.js/lib/languages/nix'
 
 const fsPromises = fs.promises
 const postsDirectory = path.join(process.cwd(), 'posts')
 
 export const mdxOptions = {
-  remarkPlugins: [remarkGfm],
-  rehypePlugins: [rehypeHighlight],
+  remarkPlugins: [
+    remarkGfm,
+    [remarkToc, {tight: true}],
+  ],
+  rehypePlugins: [
+    [rehypeHighlight, {languages: {nix}}],
+    rehypeSlug,
+  ],
 };
 
 export async function getPostSlugs() {