pokemon-showdown

#!/usr/bin/env node
'use strict';

const child_process = require('child_process');
const fs = require('fs');
const path = require('path');

// Make sure we're Node 8+

try {
	eval('{ let a = async () => {}; }');
} catch (e) {
	console.log("We require Node.js version 8 or later; you're using " + process.version);
	process.exit(1);
}

// Make sure our dependencies are available, and install them if they
// aren't

try {
	require.resolve('sockjs');
} catch (e) {
	console.log('Installing dependencies...');
	child_process.execSync('npm install --production', {stdio: 'inherit'});
}

// Make sure config.js exists. If not, copy it over synchronously from
// config-example.js, since it's needed before we can start the server

try {
	require.resolve('./config/config');
} catch (err) {
	if (err.code !== 'MODULE_NOT_FOUND') throw err; // should never happen

	console.log('config.js does not exist. Creating one with default settings...');
	fs.writeFileSync(
		path.resolve(__dirname, 'config/config.js'),
		fs.readFileSync(path.resolve(__dirname, 'config/config-example.js'))
	);
}

if (!process.argv[2] || /^[0-9]+$/.test(process.argv[2])) {
	// Start the server. We manually load app.js so it can be configured to run as
	// the main module, rather than this file being considered the main module.
	// This ensures any dependencies that were just installed can be found when
	// running on Windows and avoids any other potential side effects of the main
	// module not being app.js like it is assumed to be.
	//
	// The port the server should host on can be passed using the second argument
	// when launching with this file the same way app.js normally allows, e.g. to
	// host on port 9000:
	// $ ./pokemon-showdown 9000

	require('module')._load('./app', module, true);
} else switch (process.argv[2]) {
	case 'generate-team':
		const Dex = require('./sim/dex');
		global.toId = Dex.getId;
		const seed = process.argv[4] ? process.argv[4].split(',').map(Number) : undefined;
		console.log(Dex.packTeam(Dex.generateTeam(process.argv[3], seed)));
		break;
	default:
		console.error('Unrecognized command: ' + process.argv[2]);
		process.exit(1);
}