Sluggify — add `slug` to each part, chapter and lesson of a TutorialKit project

sluggify.js

/*
Notes:
- This might change A LOT — remember to commit your current TutorialKit state before using this script.
- To run it, put the file in your `src/content/tutorial` folder and from there run `node sluggify.js`
*/

import { promises as fs } from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

async function traverseFolders(directory) {
  try {
    const entries = await fs.readdir(directory, { withFileTypes: true });
    const folders = entries.filter(entry => entry.isDirectory());

    for (const folder of folders) {
      const folderName = folder.name;
      const match = folderName.match(/^\d+-(.*)/);
      
      if (match) {
        const namePart = match[1];
        console.log(`Processing folder: ${namePart}`);

        const subDirectory = path.join(directory, folderName);
        const possibleFiles = ['content.md', 'content.mdx', 'meta.md'];
        let contentPath;

        for (const file of possibleFiles) {
          const filePath = path.join(subDirectory, file);
          if (await fileExists(filePath)) {
            contentPath = filePath;
            break;
          }
        }

        if (contentPath) {
          await updateContentFile(contentPath, namePart);
        } else {
          console.log(`No content or meta file found in ${folderName}`);
        }
      }

      await traverseFolders(path.join(directory, folderName));
    }
  } catch (err) {
    console.error('Error:', err);
  }
}

async function fileExists(filePath) {
  try {
    await fs.access(filePath);
    return true;
  } catch {
    return false;
  }
}

async function updateContentFile(filePath, slug) {
  try {
    let content = await fs.readFile(filePath, 'utf8');

    if (!content.includes(`slug: ${slug}`)) {
      const lines = content.split('\n');
      lines.splice(1, 0, `slug: ${slug}`);
      content = lines.join('\n');

      await fs.writeFile(filePath, content, 'utf8');
      console.log(`Updated ${path.basename(filePath)} in ${path.dirname(filePath)}`);
    } else {
      console.log(`Slug already exists in ${path.basename(filePath)}`);
    }
  } catch (err) {
    console.error(`Error updating ${filePath}:`, err);
  }
}

const startDirectory = process.cwd();
traverseFolders(startDirectory);