contentlayer.config.js

/* eslint-disable @typescript-eslint/no-unsafe-member-access,@typescript-eslint/no-unsafe-call */
import { defineDocumentType, makeSource } from "contentlayer/source-files";
import remarkGfm from "remark-gfm";
import rehypePrettyCode from "rehype-pretty-code";
import rehypeSlug from "rehype-slug";
import rehypeAutolinkHeadings from "rehype-autolink-headings";

export const Post = defineDocumentType(() => ({
  name: "Post",
  filePathPattern: `**/*.mdx`,
  contentType: "mdx",
  fields: {
    title: {
      type: "string",
      description: "The title of the post",
      required: true,
    },
    date: {
      type: "date",
      description: "The date of the post",
      required: true,
    },
    summary: {
      type: "string",
      description: "The summary of the post",
      required: true,
    },
    tags: {
      type: "list",
      of: { type: "string" },
      description: "The tags of the post",
      required: true,
    },
    last_modified_at: {
      type: "date",
      description: "The last modified date of the post",
      required: true,
    },
  },
  computedFields: {
    slug: {
      type: "string",
      resolve: (doc) => doc._raw.flattenedPath,
    },
  },
}));

export default makeSource({
  contentDirPath: "content",
  documentTypes: [Post],
  mdx: {
    remarkPlugins: [remarkGfm],
    rehypePlugins: [
      rehypeSlug,
      [
        rehypePrettyCode,
        {
          theme: "one-dark-pro",

          // Keep the background or use a custom background color?
          keepBackground: false,

          // Callback hooks to add custom logic to nodes when visiting
          // them.
          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: " " }];
            }
          },
          onVisitHighlightedLine(node) {
            // Each line node by default has `class="line"`.
            node.properties.className.push("highlighted");
          },
          onVisitHighlightedWord(node) {
            // Each word node has no className by default.
            node.properties.className = ["word"];
          },
        },
      ],
      [
        rehypeAutolinkHeadings,
        {
          properties: {
            className: ["anchor"],
          },
        },
      ],
    ],
  },
});