cli.mjs

#!/usr/bin/env node
import * as fs from 'node:fs/promises';
import * as path from 'node:path';
import * as url from 'node:url';
import { parseArgs } from 'node:util';

const baseFolder = '.cursor/';

const packageJson = JSON.parse(
  await fs.readFile(
    url.fileURLToPath(url.resolve(import.meta.url, 'package.json')),
    'utf-8',
  )
);

/** 
 * CLI options @type {import('node:util').ParseArgsConfig}
 */
const config = {
  args: process.argv.slice(2),
  tokens: true,
  options: {
    flat: {
      type: 'boolean',
      short: 'f',
    },
    help: {
      type: 'boolean',
      short: 'h',
      default: false,
    },
    output: {
      type: 'string',
      short: 'o',
    },
    version: {
      type: 'boolean',
      short: 'v',
    },
  },
}

const help = () => {
  const repository = packageJson.repository.url.replace('git+', '').replace('.git', '');
  const version = packageJson.version;
  return console.info(`
╔══════════════════════════════════════╗
║  @usrrname/cursorrules v${version}   ║
╚══════════════════════════════════════╝
A standard library of Cursor Rules 
...with otaku vibes (✿ᴗ͈ˬᴗ͈)⁾⁾

Usage:
=======================================
npx @usrrname/cursorrules [options]

Options:
-f, --flat: Install without parent directory
-h, --help: Help instructions <----- You are here
-o, --output: Set output directory (Default: ./output)
-v, --version: Show package version

${repository}
`);
}

const version = () => console.log(`${packageJson.name} v${packageJson.version}`);

/**
 * @param {string} dirname - output folder relative path
 */
const downloadFiles = async (dirname) => {
  if (!dirname) throw new Error('Output directory is required');

  console.info('📥 Downloading rules...');

  if (dirname.startsWith('=')) dirname = dirname.split('=')[1];

  const outputDir = url.fileURLToPath(url.resolve(import.meta.url, dirname.trim()))

  try {
    // copy whole folder
    await fs.cp(
      url.fileURLToPath(url.resolve(import.meta.url, baseFolder)),
      outputDir,
      { recursive: true },
    )
    console.log(`✅ Success! .cursorrules saved to ${outputDir}`);
  } catch (err) {
    console.error(`❌ Error: ${err.message}`);
    process.exit(1);
  }
}

async function main() {
  console.log("🚀 Loading @usrrname/cursorrules ...");

  const { values } = parseArgs(config);

  const allowedKeys = ['flat', 'output']

  for (let key in values) {

    if (!allowedKeys.includes(key) && !values[key]) continue;

    switch (key) {
      case 'version':
        await version();
        break;
      case 'help':
        await help();
        break;
      case 'output':
        downloadFiles(values[key]?.toString() ??
          `${process.cwd()}/output/.cursor`);
        break;
      default:
        console.log(`~~~~ 📂 Flattening rules ~~~~`);
        downloadFiles(path.join(process.cwd(), '.cursor'))
        break;
    }
  }
}


try {
  await main();
} catch (err) {
  process.stderr.write('❌ Error: ' + err.message + '\n');
  process.exit(1);
}