contentlayer.config.ts

import {
  ComputedFields,
  defineDocumentType,
  FieldDefs,
  makeSource,
} from "contentlayer/source-files"
import rehypeAutolinkHeadings from "rehype-autolink-headings"
import rehypeCodeTitles from "rehype-code-titles"
import rehypePrism from "rehype-prism-plus"
import rehypeSlug from "rehype-slug"
import remarkGfm from "remark-gfm"
import remarkDirective from "remark-directive"
import toc from "markdown-toc"
import siteConfig from "./site.config"
import { remarkAdmonition } from "./lib/remark-utils"

const fields: FieldDefs = {
  title: { type: "string" },
  description: { type: "string" },
  package: { type: "string" },
}

const computedFields: ComputedFields = {
  slug: {
    type: "string",
    resolve: (doc) => doc._raw.sourceFileName.replace(/\.mdx$/, ""),
  },
  editUrl: {
    type: "string",
    resolve: (doc) => `${siteConfig.repo.editUrl}/${doc._id}`,
  },
  params: {
    type: "list",
    resolve: (doc) => doc._raw.flattenedPath.split("/"),
  },
  frontmatter: {
    type: "json",
    resolve: (doc) => ({
      title: doc.title,
      description: doc.description,
      tags: doc.tags,
      author: doc.author,
      slug: `/${doc._raw.flattenedPath}`,
      toc: toc(doc.body.raw, { maxdepth: 3 }).json.filter((t) => t.lvl !== 1),
    })
  },
}

const Docs = defineDocumentType(() => ({
  name: "Docs",
  filePathPattern: "docs/**/*.mdx",
  contentType: "mdx",
  fields,
  computedFields: {
    ...computedFields,
    pathname: {
      type: "string",
      resolve: () => "/docs/[slug]",
    },
  },
}))

const contentLayerConfig = makeSource({
  contentDirPath: "content",
  contentDirInclude: [],
  documentTypes: [Docs],
  mdx: {
    remarkPlugins: [remarkGfm, remarkDirective, remarkAdmonition],
    rehypePlugins: [
      rehypeSlug,
      rehypeCodeTitles,
      rehypePrism,
      [
        rehypeAutolinkHeadings,
        {
          behavior: "wrap",
          test: ["h2", "h3", "h4"],
          properties: { className: ["title-anchor"] },
        },
      ],
    ],
  },
})

export default contentLayerConfig