contentlayer.config.ts

import { defineDocumentType, makeSource } from "contentlayer/source-files";
import rehypeKatex from "rehype-katex";
import remarkGfm from "remark-gfm";
import remarkMath from "remark-math";

export const Post = defineDocumentType(() => ({
  name: "Post",
  filePathPattern: `**/*.mdx`,
  contentType: "mdx",
  fields: {
    title: { type: "string", required: true },
    date: { type: "date", required: true },
  },
  computedFields: {
    url: {
      type: "string",
      resolve: (post) => `/posts/${post._raw.flattenedPath}`,
    },
  },
}));

export default makeSource({
  contentDirPath: "posts",
  documentTypes: [Post],
  mdx: {
    remarkPlugins: [remarkGfm, remarkMath],
    // @ts-ignore
    rehypePlugins: [rehypeKatex, { output: "mathml" }],
  },
});