Custom MacOS Icons.js

import fs from 'fs';
import { exec, execSync } from 'child_process';
import { join } from 'path';
import path from 'path';

const args = process.argv.slice(2);

if (!process.env.SUDO_UID) {
    console.log('Re-run as sudo');
    process.exit(1);
}
const fileIconPath = fileIconExists();
if (!fileIconPath) {
    console.log('Installing fileicon from npm...');
    execSync('npm install -g fileicon');
}
if (!fileIconExists()) {
    console.error('fileicon not found');
    process.exit(1);
}
if (!args.length) {
    console.error('No arguments provided');
    process.exit(1);
}


const apps = fs.readdirSync('/Applications');
const icons = fs.readdirSync(args[0])

const maxNameLength = apps.reduce((maxLength, app) => {
    const appName = path.basename(app).replace('.app', '');
    const nameLength = appName.length;
    return Math.max(maxLength, nameLength);
}, 0);

const promises = apps.map(async (app) => {
    const icon = icons.find((i) => strip(i) === strip(app));
    if (icon) {
        try {
            await exec(`${JSON.stringify(fileIconPath)} rm ${JSON.stringify(join('/Applications', app))}`);
            const output = await exec(`${JSON.stringify(fileIconPath)} set ${JSON.stringify(join('/Applications', app))} ${JSON.stringify(join(args[0], icon))}`);
            const appName = app.replace('.app', '');
            const fileName = icon.replace(/^.*[\\/]/, '');
            console.log(`✅ ${appName.padEnd(maxNameLength + 5, ' ')} —      Set to ${fileName}`);
        } catch (e) {
            console.error(`🛑 Error setting icon for ${app}:`, e);
            process.exit(1);
        }
    }
});

try {
    await Promise.all(promises);
} catch (e) {
    console.error('Error executing promises:', e);
    process.exit(1);
}

function strip(str) {
    return str.replace('.app', '').replace('.icns', '').toLowerCase().trim();
}
function fileIconExists() {
    try {
        return execSync(`which fileicon`).toString().trim();
    } catch (e) {
        return false;
    }
}