webpack.config.js

var webpack = require('webpack');

module.exports = function(env) {
	return {
		output: {
			filename: 'main.js',
			libraryTarget: 'var',
			// This lets us access the bundle from outside... this means we can pass the loop to Screeps!
			// We bundle for speed, and can still use CommonJS goodness :D
	    	library: 'main' 
		},
		externals: {
	        // lodash: '_', // For test this needs to be external? Hmm... not sure!
	        // http://screeps.wikia.com/wiki/Globals
	        Game: 'Game',
	        Memory: 'Memory',
	        ConstructionSite: 'ConstructionSite',
			Creep: 'Creep',
			Energy: 'Energy',
			Exit: 'Exit',
			Flag: 'Flag',
			Room: 'Room',
			RoomPosition: 'RoomPosition',
			Source: 'Source',
			Spawn: 'Spawn',
			Structure: 'Structure',
			// Others...
			StructureTower: 'StructureTower'
	    },
		// Prefer to resolve requires from base of app
		resolve: {
		    modules: [__dirname + '/src', __dirname + '/test', 'node_modules'],
		    alias: {
			    log: 'helpers/log',
			    config: 'config'
		    }
		},
		// This gets overwritten in karma to be 'test'... not ideal, but having a lot of trouble with env variable for webpack
		plugins: [
		    new webpack.DefinePlugin({
		        'process.env': {
		            NODE_ENV: JSON.stringify(env)
		        }
		    })
		]
	}
};