cli.mjs

#!/usr/bin/env node

import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';
import { use } from 'use-m';
import { readFileSync } from 'fs';

// Import yargs and helpers dynamically using `use`
const yargs = await use('yargs@17.7.2');
const { hideBin } = await use('yargs@17.7.2/helpers');

const currentScriptDir = dirname(fileURLToPath(import.meta.url));

// Function to get the loader path
function getLoaderPath() {
  // Get the directory of the current file (cli.mjs)
  try {
    return resolve(currentScriptDir, 'loader.js');
  } catch (err) {
    throw new Error('Failed to get the loader path.', { cause: err });
  }
}

// Function to get the version from package.json
function getVersion() {
  try {
    const packageJsonPath = resolve(currentScriptDir, 'package.json');
    const packageJson = JSON.parse(readFileSync(packageJsonPath, 'utf8'));
    return packageJson.version;
  } catch (err) {
    throw new Error('Failed to read package.json or determine the version.', { cause: err });
  }
}

yargs(hideBin(process.argv))
  .scriptName('use-m')
  .usage('$0 [options]')
  .option('loader-path', {
    alias: 'lp',
    type: 'boolean',
    description: 'Output the path to loader.js file',
  })
  .help('help')
  .alias('help', 'h')
  .version(getVersion()) // Use yargs' built-in version functionality
  .alias('version', 'v')
  .command('$0', 'Default command', () => { }, (argv) => {
    if (argv.loaderPath) {
      console.log(getLoaderPath());
    } else {
      yargs.showHelp();
    }
  })
  .parse();