source: Dev/trunk/src/client/util/build/transforms/optimizer/uglify.js

/*jshint node:true */
define([
        "../../buildControl",
        "../../fs",
        "./stripConsole",
        "dojo/_base/lang",
        "dojo/has",
        "dojo/has!host-node?dojo/node!uglify-js:"
], function(bc, fs, stripConsole, lang, has, uglify){
        if(!uglify){
                throw new Error("Unknown host environment: only nodejs is supported by uglify optimizer.");
        }

        return function(resource, text, copyright, optimizeSwitch, callback){
                copyright = copyright || "";

                var options = bc.optimizeOptions || {};

                if(optimizeSwitch.indexOf(".keeplines") > -1){
                        options.gen_options = options.gen_options || {};
                        options.gen_options.beautify = true;
                        options.gen_options.indent_level = 0; //don't indent, just keep new lines
                }
                if(optimizeSwitch.indexOf(".comments") > -1){
                        throw new Error("'comments' option is not supported by uglify optimizer.");
                }

                process.nextTick(function(){
                        try{
                                var result = copyright + "//>>built" + bc.newline + uglify(stripConsole(text), options);

                                fs.writeFile(resource.dest, result, resource.encoding, function(err){
                                        if(err){
                                                bc.log("optimizeFailedWrite", ["filename", result.dest]);
                                        }
                                        callback(resource, err);
                                });
                        }catch(e){
                                bc.log("optimizeFailed", ["module identifier", resource.mid, "exception", e + ""]);
                                callback(resource, 0);
                        }
                });

                return callback;
        };
});