helper render script for previewing

Rakefile

@@ -10,4 +10,18 @@ desc 'Start up server'
 task :server do
 	require 'rack'
 	Rack::Server.start :Port => 3000, :environment => ENV['RACK_ENV'], :pid => nil, :Host => '0.0.0.0', :AccessLog => [], :config => 'config.ru'
+end
+
+desc 'Render equip'
+task :render do
+	command = `which phantomjs`.strip
+	if $?.exitstatus == 1
+		puts "Please ensure phantom.js is installed and in your path."
+		exit -1
+	end
+
+	script = File.expand_path('../build/render.js', __FILE__)
+	output = ENV['OUTPUT'] || File.join(Dir.pwd, 'equip.jpg')
+
+	system "#{command} \"#{script}\" \"#{output}\""
 end

build/render.js

@@ -0,0 +1,29 @@
+var page = require('webpage').create(),
+		output = phantom.args[0],
+		viewportWidth = parseInt(phantom.args[1]) || 1200;
+
+if (!output) {
+	console.log("Usage: render.js <output file>");
+	phantom.exit(-1);
+}
+
+page.viewportSize = {width: viewportWidth, height: 400};
+page.open("http://localhost:3000", function(status) {
+	if (!status) {
+		console.log("Could not connect to server. Ensure you've run `rake server` prior to running this script.");
+		phantom.exit(-1);
+	}
+
+	var viewport = page.evaluate(function() {
+		return {
+			width: document.body.clientWidth,
+			height: document.body.clientHeight
+		};
+	});
+	page.viewportSize = viewport;
+
+	console.log("Rendering equip to", output);
+	page.render(output);
+	console.log("Done.");
+	phantom.exit();
+});