Download, Unzip, Classify.

iosevka-nf-concentrator.mjs

import { promises as fs, constants as FS } from 'node:fs';
import { exec } from 'node:child_process';
import { promisify } from 'node:util';
import path from 'node:path';

const ColorRegex = /(?:\\([fFbB])([0-9]))|(\\0)/g;
function echo(templates, ...params) {
  console.log(
    String.raw(templates, ...params)
      .replaceAll(ColorRegex, (_, fb, id, zero) =>
        zero
          ? '\x1B[0m'
          :`\x1B[${{f:3,F:9,b:4,B:10}[fb]}${id}m`
      )
  );
}

const execPromise = promisify(exec);
const $ = async (templates, ...params) => {
  const cmd = Object.keys(templates)
    .reduce(
      (acc, index) => acc + templates[index] + String(params[index] ?? ''),
      ''
    );
  try {
    echo`\F3$\0 \F0${cmd}\0`;
    await execPromise(cmd);
  } catch (e) {
    echo`\F1${e.stderr}\0`;
    process.exit(e.code);
  }
};

const cwd = process.cwd();


echo`\F2Iosevka NF Concentrator\0`;
echo`Make sure you have installed 7z and it is accessible.`;
echo`1. Download font bundle... (Iosevka Nerd Fonts v2.2.0-RC)`;

try {
  await fs.access(path.join(cwd, 'Iosevka.zip'), FS.F_OK);
  echo`    Zip file found!`;
} catch {
  echo`    Zip file does not exists.`;
  echo`    Download via curl...`;
  await $`curl -OL https://github.com/ryanoasis/nerd-fonts/releases/download/2.2.0-RC/Iosevka.zip`;
}

echo`2. Unzip the file...`;

try {
  await fs.access(path.join(cwd, 'files'), FS.F_OK);
  echo`    Folder found!`;
} catch {
  echo`    Folder does not exists.`;
  echo`    Unzip using 7-zip...`;
  await $`7z x Iosevka.zip -ofiles`;
}

echo`3. Classify font files...`;

const NormalWindowsCompat = /^Iosevka (?!Term)\s*(.+)\s*Nerd Font Complete Windows Compatible.ttf$/;
const files = await fs.readdir(path.join(cwd, 'files'));

try {
  await fs.mkdir('windows-compat');
} catch {
  // do nothing
}
for (const file of files.filter(name => name.match(NormalWindowsCompat))) {
  await $`move "${path.join('files', file)}" "${path.join('windows-compat', file)}"`;
}