Gif splitter

package.json

{
  "name": "gif_renamer",
  "version": "0.1.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "sharp": "^0.18.2"
  }
}

splitter.js

// split files into folder, based on the mime type

const srcFolder = './img_src/';
const outFolder = './img_out/';
const fs = require('fs');
const sharp = require('sharp');

// scan img_src folder and get an array of files
fs.readdir(srcFolder, (err, files) => {
  // go through each file and compare file extension with file type (check header)
  files.forEach(file => {
    var srcPath = srcFolder + file
    compareExtVsType(srcPath, file);
  });
})

function compareExtVsType(srcPath, file) {
	
	var img = sharp(srcPath)
	
	img.metadata().then(data => {
		format = data.format

		fileSlices = file.match(/^(.*)\.(.*)$/);
		
		if (fileSlices[2] !== format && format == "gif") {
			fs.createReadStream(srcPath).pipe(fs.createWriteStream(`${outFolder}/${fileSlices[1]}.gif`));
			// console.log(`${file} has ${format} format, it was copied to ${outFolder}/${fileSlices[1]}.gif`);
			console.log(`'${file}',`)
		}

	});
	

}