Accompanying sources files for http://cruft.io/posts/node-command-line-utilities/

gitsearch.js

#!/usr/bin/env node

var program = require('commander');
var request = require('request');
var chalk = require('chalk');

program
	.version('0.0.1')
	.usage('[options] <keywords>')
	.option('-o, --owner [name]', 'Filter by the repositories owner')
	.option('-l, --language [language]', 'Filter by the repositories language')
	.option('-f, --full', 'Full output without any styling')
	.parse(process.argv);

if(!program.args.length) {
	program.help();
} else {
	var keywords = program.args;
	var url = 'https://api.github.com/search/repositories?sort=stars&order=desc&q='+keywords;

	if(program.owner) {
		url = url + '+user:' + program.owner;
	}

	if(program.language) {
		url = url + '+language:' + program.language;
	}

	request({
		method: 'GET',
		headers: {
			'User-Agent': 'YourGitHubUsername'
		},
		url: url
	}, function(error, response, body) {

		if (!error && response.statusCode == 200) {
			var body = JSON.parse(body);
			if(program.full) {
				console.log(body);
			} else {
				for(var i = 0; i < body.items.length; i++) {
					console.log(chalk.cyan.bold('Name: ' + body.items[i].name));
					console.log(chalk.magenta.bold('Owner: ' + body.items[i].owner.login));
					console.log(chalk.grey('Desc: ' + body.items[i].description + '\n'));
					console.log(chalk.grey('Clone url: ' + body.items[i].clone_url + '\n'));
				}
				process.exit(0);
			}
			process.exit(0);
		} else if (error) {
			console.log(chalk.red('Error: ' + error));
			process.exit(1);
		}
	});
}

package.json

{
  "name": "gitsearch",
  "version": "0.0.1",
  "description": "A simple command-line tool for searching git repositories",
  "author": "Glynn Phillips",
  "engines": {
    "node": ">=0.10"
  },
  "dependencies": {
    "commander": "~2.2.0",
    "request": "~2.36.0",
    "chalk": "~0.4.0"
  },
  "bin": {
    "gitsearch": "gitsearch.js"
  }
}

It seems you won't produce any output in case statusCode is different from 200 (eg. 400)