YYYY_MM_DD.md to YYYY-MM-DD.md

parse-md-names.js

const fs = require('fs');
const path = require('path');

const targetDir = './your_folder'; // Replace with your target folder

// Regular expression pattern to match files by YYYY_MM_DD.md format
const filePattern = /^\d{4}_\d{2}_\d{2}\.md$/;

// Get a list of all files in the target folder
fs.readdir(targetDir, (err, files) => {
  if (err) {
    console.error('Error reading target folder:', err);
    return;
  }

  // Iterate through the files in the target folder
  files.forEach((file) => {
    if (filePattern.test(file)) {
      const sourcePath = path.join(targetDir, file);
      const targetFile = file.replace(filePattern, (match) => {
        const datePart = match.split('.')[0];
        const parts = datePart.split('_');
        return `${parts[0]}-${parts[1]}-${parts[2]}.md`;
      });
      const targetPath = path.join(targetDir, targetFile);

      // Rename the file
      fs.rename(sourcePath, targetPath, (err) => {
        if (err) {
          console.error(`Error renaming file ${file}:`, err);
          return;
        }
        console.log(`File ${file} transformed to ${targetFile}`);
      });
    }
  });
});