Migrate from contentlayer to content-collections

.gitignore

@@ -40,4 +40,4 @@ next-env.d.ts
 /.react-email/
 
 .vscode
-.contentlayer
+.content-collections

app/(docs)/docs/[[...slug]]/page.tsx

@@ -1,5 +1,5 @@
 import { notFound } from "next/navigation";
-import { allDocs } from "contentlayer/generated";
+import { allDocs } from "content-collections";
 
 import { getTableOfContents } from "@/lib/toc";
 import { Mdx } from "@/components/content/mdx-components";
@@ -20,7 +20,8 @@ interface DocPageProps {
 }
 
 async function getDocFromParams(params) {
-  const slug = params.slug?.join("/") || "";
+  const slug = params.slug?.join("/") || "index";
+
   const doc = allDocs.find((doc) => doc.slugAsParams === slug);
 
   if (!doc) return null;
@@ -58,11 +59,12 @@ export default async function DocPage({ params }: DocPageProps) {
     notFound();
   }
 
-  const toc = await getTableOfContents(doc.body.raw);
+  const toc = await getTableOfContents(doc.content);
 
   const images = await Promise.all(
     doc.images.map(async (src: string) => ({
       src,
+      alt: "Image",
       blurDataURL: await getBlurDataURL(src),
     })),
   );
@@ -72,7 +74,7 @@ export default async function DocPage({ params }: DocPageProps) {
       <div className="mx-auto w-full min-w-0">
         <DocsPageHeader heading={doc.title} text={doc.description} />
         <div className="pb-4 pt-11">
-          <Mdx code={doc.body.code} images={images} />
+          <Mdx code={doc.body} images={images} />
         </div>
         <hr className="my-4 md:my-6" />
         <DocsPager doc={doc} />

app/(docs)/guides/[slug]/page.tsx

@@ -1,4 +1,4 @@
-import { allGuides } from "contentlayer/generated";
+import { allGuides } from "content-collections";
 import Link from "next/link";
 import { notFound } from "next/navigation";
 
@@ -53,14 +53,14 @@ export default async function GuidePage({
     notFound();
   }
 
-  const toc = await getTableOfContents(guide.body.raw);
+  const toc = await getTableOfContents(guide.body);
 
   return (
     <MaxWidthWrapper>
       <div className="relative py-6 lg:grid lg:grid-cols-[1fr_300px] lg:gap-10 lg:py-10 xl:gap-20">
         <div>
           <DocsPageHeader heading={guide.title} text={guide.description} />
-          <Mdx code={guide.body.code} />
+          <Mdx code={guide.body} />
           <hr className="my-4" />
           <div className="flex justify-center py-6 lg:py-10">
             <Link

app/(docs)/guides/page.tsx

@@ -1,5 +1,5 @@
 import Link from "next/link";
-import { allGuides } from "contentlayer/generated";
+import { allGuides } from "content-collections";
 import { compareDesc } from "date-fns";
 
 import { formatDate } from "@/lib/utils";

app/(marketing)/(blog-post)/blog/[slug]/page.tsx

@@ -1,5 +1,5 @@
 import { notFound } from "next/navigation";
-import { allPosts } from "contentlayer/generated";
+import { allPosts } from "content-collections";
 
 import { Mdx } from "@/components/content/mdx-components";
 
@@ -72,13 +72,14 @@ export default async function PostPage({
       )) ||
     [];
 
-  const toc = await getTableOfContents(post.body.raw);
+  const toc = await getTableOfContents(post.content);
 
   const [thumbnailBlurhash, images] = await Promise.all([
     getBlurDataURL(post.image),
     await Promise.all(
       post.images.map(async (src: string) => ({
         src,
+        alt: "image",
         blurDataURL: await getBlurDataURL(src),
       })),
     ),
@@ -140,7 +141,7 @@ export default async function PostPage({
               sizes="(max-width: 768px) 770px, 1000px"
             />
             <div className="px-[.8rem] pb-10 md:px-8">
-              <Mdx code={post.body.code} images={images} />
+              <Mdx code={post.body} images={images} />
             </div>
           </div>
 

app/(marketing)/[slug]/page.tsx

@@ -1,5 +1,5 @@
 import { notFound } from "next/navigation";
-import { allPages } from "contentlayer/generated";
+import { allPages } from "content-collections";
 
 import { Mdx } from "@/components/content/mdx-components";
 
@@ -49,6 +49,7 @@ export default async function PagePage({
   const images = await Promise.all(
     page.images.map(async (src: string) => ({
       src,
+      alt: "image",
       blurDataURL: await getBlurDataURL(src),
     })),
   );
@@ -64,7 +65,7 @@ export default async function PagePage({
         )}
       </div>
       <hr className="my-4" />
-      <Mdx code={page.body.code} images={images} />
+      <Mdx code={page.body} images={images} />
     </article>
   );
 }

app/(marketing)/blog/category/[slug]/page.tsx

@@ -1,6 +1,6 @@
 import { Metadata } from "next";
 import { notFound } from "next/navigation";
-import { allPosts } from "contentlayer/generated";
+import { allPosts } from "content-collections";
 
 import { BLOG_CATEGORIES } from "@/config/blog";
 import { constructMetadata, getBlurDataURL } from "@/lib/utils";

app/(marketing)/blog/page.tsx

@@ -1,4 +1,4 @@
-import { allPosts } from "contentlayer/generated";
+import { allPosts } from "content-collections";
 
 import { constructMetadata, getBlurDataURL } from "@/lib/utils";
 import { BlogPosts } from "@/components/content/blog-posts";

components/content/blog-card.tsx

@@ -1,5 +1,5 @@
 import Link from "next/link";
-import { Post } from "contentlayer/generated";
+import { Post } from "content-collections";
 
 import { cn, formatDate, placeholderBlurhash } from "@/lib/utils";
 import BlurImage from "@/components/shared/blur-image";

components/content/blog-posts.tsx

@@ -1,4 +1,4 @@
-import { Post } from "@/.contentlayer/generated";
+import { Post } from "content-collections";
 
 import { BlogCard } from "./blog-card";
 

components/content/mdx-components.tsx

@@ -1,7 +1,7 @@
 import * as React from "react";
 import NextImage, { ImageProps } from "next/image";
 import Link from "next/link";
-import { useMDXComponent } from "next-contentlayer2/hooks";
+import { useMDXComponent } from "@content-collections/mdx/react";
 
 import { cn } from "@/lib/utils";
 import { MdxCard } from "@/components/content/mdx-card";

components/docs/pager.tsx

@@ -1,5 +1,5 @@
 import Link from "next/link"
-import { Doc } from "contentlayer/generated"
+import { Doc } from "content-collections"
 
 import { docsConfig } from "@/config/docs"
 import { cn } from "@/lib/utils"

content-collections.ts

@@ -0,0 +1,151 @@
+import {
+  defineCollection,
+  defineConfig,
+  Context,
+  Document,
+} from "@content-collections/core";
+import rehypeAutolinkHeadings from "rehype-autolink-headings";
+import rehypePrettyCode from "rehype-pretty-code";
+import rehypeSlug from "rehype-slug";
+import remarkGfm from "remark-gfm";
+import { visit } from "unist-util-visit";
+import { compileMDX } from "@content-collections/mdx";
+
+type Transformed = {
+  _id: string
+  body: string;
+  slug: string;
+  images: string[];
+  slugAsParams: string;
+}
+
+const transform = async <T extends Document & { content: string }>(
+  doc: T,
+  context: Context
+): Promise<T & Transformed> => {
+  const body = await compileMDX(context, doc, {
+    remarkPlugins: [remarkGfm],
+    rehypePlugins: [
+      rehypeSlug,
+      () => (tree) => {
+        visit(tree, (node) => {
+          if (node?.type === "element" && node?.tagName === "pre") {
+            const [codeEl] = node.children;
+            if (codeEl.tagName !== "code") return;
+            node.rawString = codeEl.children?.[0].value;
+          }
+        });
+      },
+      [
+        rehypePrettyCode,
+        {
+          theme: "github-dark",
+          keepBackground: false,
+          onVisitLine(node) {
+            // Prevent lines from collapsing in `display: grid` mode, and allow empty lines to be copy/pasted
+            if (node.children.length === 0) {
+              node.children = [{ type: "text", value: " " }];
+            }
+          },
+        },
+      ],
+      () => (tree) => {
+        visit(tree, (node) => {
+          if (node?.type === "element" && node?.tagName === "figure") {
+            if (!("data-rehype-pretty-code-figure" in node.properties)) {
+              return;
+            }
+            const preElement = node.children.at(-1);
+            if (preElement.tagName !== "pre") {
+              return;
+            }
+            preElement.properties["rawString"] = node.rawString;
+          }
+        });
+      },
+      [
+        rehypeAutolinkHeadings,
+        {
+          properties: {
+            className: ["subheading-anchor"],
+            ariaLabel: "Link to section",
+          },
+        },
+      ],
+    ],
+  });
+
+  const imageMatches =
+    doc.content.match(/(?<=<Image[^>]\bsrc=")[^"]+(?="[^>]\/>)/g) || [];
+
+  const rootPath = context.collection.directory.split("/").slice(1).join("/")
+
+  const transformedDoc: T & Transformed = {
+    ...doc,
+    body,
+    images: imageMatches,
+    _id: doc._meta.filePath,
+    slugAsParams: doc._meta.path,
+    slug: `/${rootPath}/${doc._meta.path}`
+  };
+
+  return transformedDoc;
+};
+
+const Page = defineCollection({
+  name: "Page",
+  directory: "content/pages",
+  include: "**/*.mdx",
+  schema: (z) => ({
+    title: z.string(),
+    description: z.string().optional(),
+  }),
+  transform,
+});
+
+const Doc = defineCollection({
+  name: "Doc",
+  directory: "content/docs",
+  include: "**/*.mdx",
+  schema: (z) => ({
+    title: z.string(),
+    description: z.string().optional(),
+    published: z.boolean().default(true),
+  }),
+  transform,
+});
+
+const Guide = defineCollection({
+  name: "Guide",
+  directory: "content/guides",
+  include: "**/*.mdx",
+  schema: (z) => ({
+    title: z.string(),
+    description: z.string().optional(),
+    date: z.string(),
+    published: z.boolean().default(true),
+    featured: z.boolean().default(false),
+  }),
+  transform,
+});
+
+const Post = defineCollection({
+  name: "Post",
+  directory: "content/blog",
+  include: "**/*.mdx",
+  schema: (z) => ({
+    title: z.string(),
+    description: z.string().optional(),
+    date: z.string(),
+    published: z.boolean().default(true),
+    image: z.string(),
+    authors: z.array(z.string()),
+    categories: z.array(z.enum(["news", "education"])).default(["news"]),
+    related: z.array(z.string()).optional(),
+  }),
+  transform,
+});
+
+export default defineConfig({
+  collections: [Page, Doc, Guide, Post],
+});