node-scripts-optimize-images.js

// npm install sharp
const sharp = require('sharp')

/*
usage
```shell
node node-optimize-images.js ./src/assets/ image-name.jpg
```
expected result: 
./src/assets/image-name_2.jpg
*/
// accept args from command line: https://nodejs.dev/learn/nodejs-accept-arguments-from-the-command-line 
const args = process.argv.slice(2)
const pathToImageLocation = args[0];
const fileName = args[1];
const newFormat = args[2];

function optimize(path, fileName) {
  if (!path || !fileName) {
    if (!path) {
        console.error("Please enter the location to the image, ex. ./assets/")
    } 
    if (!fileName) {
        console.error("Please enter name of file to optimize, ex. image.jpg");
    }
    return;
  }

  const imageSrc = pathToImageLocation + fileName;
  const imageFormat = newFormat || fileName.split(".").at(-1);

  let newFileName = fileName.split(".");

  newFileName.pop()

  newFileName = [...newFileName, imageFormat].join("_2.");

  return sharp(imageSrc)
    .toFormat(imageFormat, {
        quality: 80,
        compressOnly: true,
        density: 72
    })
    .toFile(pathToImageLocation + newFileName)
    .then((data) => console.log(data));
}

optimize(pathToImageLocation, fileName)