.squoosh.mjs

import { dirname } from "path";
import execa from "execa";
import glob from "glob";
import pLimit from "p-limit";

const limit = pLimit(3);
const [globs] = process.argv.slice(2);
const algo = {
  'jpg': '--mozjpeg',
  'jpeg': '--mozjpeg',
  'png': '--oxipng',
  'webp': '--webp',
  'avif': '--avif',
  'jxl': '--jxl',
  'wp2': '--wp2',
};
const promises = [];
const errors = [];

const imgs = glob.sync(globs, {nonull: false});

imgs && imgs.map(async (img) => promises.push(
  limit(async () => {
    try {
      const dir = dirname(img);
      const ext = /\.([^\.]+)$/ig.exec(img)[1];

      await execa("squoosh-cli", [
        algo[ext],
        "auto",
        "--output-dir",
        dir,
        img
      ], {
        stderr: process.stdout,
        stdout: process.stdout
      });
    } catch (e) {
      console.log(e);
      // errors.push(e.message || e);
    }
  })
));

await Promise.all(promises);

if (errors.length > 0) {
  console.error('Optimising images failed with errors:\n\n', errors.join('\n\n'));
  process.exit(1);
} else {
  console.log('Optimised all images, running additional commands now');
  process.exit(0);
}