astro.config.mjs

import fs from "fs";
import dayjs from "dayjs";
import tailwind from "@astrojs/tailwind";
import react from "@astrojs/react";
import { defineConfig } from "astro/config";
import { parse } from "node-html-parser";
import { SITE } from "./src/config";

function defaultLayoutPlugin() {
  return function (tree, file) {
    const filePath = file.history[0];
    file.data.astro.frontmatter.layout = "@layouts/post.astro";

    // 头图放到文档中的第一行，会自动帮你处理，也可以用 frontmatter 方式，赋值给 pic 字段
    if (tree.children[0]?.value && !file.data.astro.frontmatter.pic) {
      const imageElement = parse(tree.children[0].value).querySelector("img");
      file.data.astro.frontmatter.pic = imageElement.getAttribute("src");
    }

    // 描述放到文档中头图的下一行，会自动帮你处理，也可以用 frontmatter 方式，赋值给 desc 字段
    if (tree.children[1]?.children[1]?.value) {
      file.data.astro.frontmatter.desc = tree.children[1].children[1].value;
    }

    const { date, desc, pic } = file.data.astro.frontmatter;

    // 兼容没有描述情况
    if (!desc) {
      file.data.astro.frontmatter.desc = SITE.description;
    }

    // 兼容没有头图的情况
    if (!pic) {
      file.data.astro.frontmatter.pic = SITE.pic;
    }

    //这里也可以直接在 frontmatter，赋值给 date 字段
    if (!date) {
      const createDate = dayjs(fs.statSync(filePath).birthtime).format(
        "YYYY/MM/DD"
      );

      file.data.astro.frontmatter.date = createDate;
    }
  };
}

// https://astro.build/config
export default defineConfig({
  site: "https://markyun.github.io/weekly/",
  base: "/weekly",
  output: "static",
  integrations: [react(), tailwind()],
  markdown: {
    remarkPlugins: [defaultLayoutPlugin],
  },
});