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Tips: How to bulk convert file names using Node.js

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I needed to convert my folder structure from something like this:

  • posts/test/index.md
  • posts/hey-cool-post/index.md

to this:

  • posts/test.md
  • posts/hey-cool-post.md

removing the folder that contains an index.md file, and instead use the markdown filename as the post slug (the part that’s used as the post URL).

I used a Node.js script to do this.

Here it is:

const fs = require('fs')
const glob = require('glob')

const root_folder = '.' //search in the current folder

glob(root_folder + '/**/index.md', (err, files) => {
  if (err) {
    console.log('Error', err)
  } else {
    for (const file_path of files) {
      const match = file_path.match(/\/(.*?)\//)
      const folder_name = match[1]

      fs.copyFile(file_path, './' + folder_name + '.md', (err) => {
        if (err) {
          console.log('Error Found:', err)
        } else {
          console.log('File moved!')
        }
      })
    }
  }
})

Lessons in this unit:

0: Introduction
1: Axios crashes the Node.js process when the request fails
2: How to set up a cron job that runs a Node.js app
3: How to get both parsed body and raw body in Express
4: Interact with the Google Analytics API using Node.js
5: ▶︎ How to bulk convert file names using Node.js
6: How to deep copy JavaScript objects using structuredClone
7: How to handle file uploads in Node.js
8: How to send an email using nodemailer
9: Logging all the requests coming through an Express app
10: How to upload an image to S3 using Node.js
11: How to read a CSV file with Node.js
12: How to set the current working directory of a Node.js program
13: How to upload files to S3 from Node.js
14: How to write a CSV file with Node.js
15: Where to host a Node.js app
16: Parsing JSON with Node.js
17: nodemailer, how to embed an image into an email
18: The Pug Guide
19: Restarting a Node process without file changes
20: How to use Sequelize to interact with PostgreSQL