Gets the first paragraph of a wikipedia query. I'm sure there's a better way.

wikipedia-summary.js

#!/usr/bin/env phantomjs

var system = require('system');

// because console.error currently goes to stdout
console.error = system.stderr.writeLine;

if (system.args.length !== 2) {
	console.error('usage: ' + system.args[0] + ' query');
	phantom.exit(1);
}

var url = 'https://en.wikipedia.org/w/index.php?search=' + system.args[1];

function load(url) {
	var page = require('webpage').create();
	var redirectURL = null;

	page.onResourceReceived = function(resource) {
		if (url == resource.url && resource.redirectURL) {
			redirectURL = resource.redirectURL;
		}
	};

	page.open(url, function(status) {
		if (redirectURL) {
			load(redirectURL);
		} else if (status === 'success') {
			var para1 = this.evaluate(function() {
				var c = document.getElementById('mw-content-text').children;
				for (var i = 0; i < c.length; i++) {
					if (c[i].tagName != 'P')
						continue;
					return c[i].textContent;
				}
				return "";
			});
			console.log(para1);
			phantom.exit(0);
		} else {
			console.error('failed to load ' + url);
			phantom.exit(2);
		}
	});
}

load(url);