funcunit/site/node_modules/steal-tools/lib/graph/minify.js

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var minifyJS = require('../buildTypes/minifyJS'),
	transformActiveSource = require("../node/transform_active_source"),
	winston = require("winston");

function minify(node, options) {
	transformActiveSource(node,"minify-true", function(node, source){
		var buildType = node.load.metadata.buildType;

		// skip css source files, css is minified after the bundle is concatenated
		if(buildType === "css") {
			return source;
		} else {
			var result;
			try {
				result = minifyJS(source, options);	
			} catch(e) {
				winston.warn("Error occured while minifying", node.load.address);
				throw(e);
			}
			
			return result;
		}
	});
}

module.exports = function(graph, options){
	options = options || {};

	if(Array.isArray(graph, options)) {
		graph.forEach(function(node){
			minify(node, options);
		});
	} else {
		for(var name in graph) {
			var node = graph[name];
			minify(node, options);
		}
	}
	return graph;
};