@shikijs/vitepress-twoslash/dist/cache-fs.mjs

Enable Twoslash support in VitePress

import { createHash } from 'node:crypto';
import { writeFileSync, existsSync, readFileSync, mkdirSync } from 'node:fs';
import { resolve, join } from 'node:path';
import process from 'node:process';

function createFileSystemTypesCache(options = {}) {
  const dir = resolve(process.cwd(), options.dir ?? ".vitepress/cache/twoslash");
  return {
    init() {
      mkdirSync(dir, { recursive: true });
    },
    read(code) {
      const hash = createHash("SHA256").update(code).digest("hex").slice(0, 12);
      const filePath = join(dir, `${hash}.json`);
      if (!existsSync(filePath)) {
        return null;
      }
      return JSON.parse(readFileSync(filePath, { encoding: "utf-8" }));
    },
    write(code, data) {
      const hash = createHash("SHA256").update(code).digest("hex").slice(0, 12);
      const filePath = join(dir, `${hash}.json`);
      const json = JSON.stringify(data);
      writeFileSync(filePath, json, { encoding: "utf-8" });
    }
  };
}

export { createFileSystemTypesCache };