How to make external dependency run only once from getStaticPaths and getStaticProps

[SukkaW]

I am trying to intergrare [Hexo] into a Next.js project. Although Hexo itself is a known SSG, its APIs make it can be used as a CMS, too.

So I start a project like this:

├── README.md
├── components
├── hexo
│   └── index.ts
├── next-env.d.ts
├── next.config.js
├── package-lock.json
├── package.json
├── pages
│   ├── about.tsx
│   ├── index.tsx
│   └── post
│       └── [id].tsx
└── tsconfig.json

And in hexo/index.ts I exports some API to be used in getStaticPaths and getStaticProps:

import Hexo from 'hexo';

let hexo = null;

const init = async () => {
  // This only needs to be initiated once
  if (!hexo) {
    hexo = new Hexo(process.cwd(), {});
    await hexo.init(); // Load hexo's config and plugins
    await hexo.load(); // Load hexo's local cache and data
    console.log('load hexo!')
  }
  return hexo;
};

export const getPosts = async () => {
  await init();
  const posts = hexo.locals.get('posts').sort('-date').toArray();
  return posts.map(post => ({
    params: {
      id: post.path.replace('post/', '').replace(/\/$/, '')
    }
  }));
};

export const findPostById = async (id) => {
  await init();
  return hexo.locals.get('posts').findOne({ path: `post/${id}/` });
};

And in pages/post/[id].tsx I import hexo/index.tsx:

import { getPosts, findPostById } from '../hexo';

interface PostProps {
  post: {
    title: string
  }
}

const Post = (props: PostProps) => {
  return (
    <div>
      <h1>Post Title: {props.post.title}!</h1>
    </div>
  );
};

export default Post;

export async function getStaticPaths() {
  const posts = await getPosts();

  return {
    paths: posts,
    fallback: false
  };
}

export async function getStaticProps({ params }: { params: { id: string } }) {
  const post = await findPostById(params.id);
  console.log(post);
  return {
    props: {
      title: post.title
    }
  };
}

However, when I run npx next build, I notice load hexo! showed up more than once. It shows up on Collecting page data, and every static post page being generated (Generating static pages).

Anyone can help me with that?

---

Update

OK, I have some clue. I add console.log(process.pid, process.ppid); to hexo/index.ts. And then I realize Next.js use multi-thread to speed up getStaticPaths and getStaticProps (they usually involve requesting an external API endpoint or querying a database, which can be slow). However, in my case, I only need one instance across all pages. How can I disable the multi-thread, or does Next.js supports sharing an instance across different pages?

---

Update

How can I disable the multi-thread, or does Next.js supports sharing an instance across different pages?

After taking a look at the source code of Next.js, it is impossible. A feature request has been issued: #33015