simple "make" utility. ideas welcome.

For now, write a Makefile.uglify.js file with contents like this:

    {
      files: [
        { name: "foo.js", module: "Foo" },
        { name: "bar.js", hide: true }
      ]
    }

If you run uglifyjs --make it will read and compress foo.js and wrap it like
this:

    (function(){ return this })().Foo = (function(exports, global){
        ... compressed contents of foo.js ...
    })({}, (function(){ return this })());

as for bar.js it'll wrap like this:

    (function(){
        ... compressed contents of bar.js ...
    })()

Both of them are concatenated and returned.

The "module" is thus useful to use libraries designed for a CommonJS
environment in browser.

This is just a quick hack as I needed it fast, but the plan is to evolve
it—handle compressor options in the Makefile, additional possibilities to
wrap the files, maybe handle require(...).

bin/uglifyjs

@@ -29,6 +29,7 @@ var options = {
                 quote_keys: false,
                 space_colon: false
         },
+        make: false,
         output: true            // stdout
 };
 
@@ -170,6 +171,9 @@ out: while (args.length > 0) {
             case "--ascii":
                 options.codegen_options.ascii_only = true;
                 break;
+            case "--make":
+                options.make = true;
+                break;
             default:
                 filename = v;
                 break out;
@@ -186,12 +190,27 @@ jsp.set_logger(function(msg){
         sys.debug(msg);
 });
 
-if (filename) {
+if (options.make) {
+        options.out_same_file = false; // doesn't make sense in this case
+        var makefile = JSON.parse(fs.readFileSync(filename || "Makefile.uglify.js").toString());
+        output(makefile.files.map(function(file){
+                var code = fs.readFileSync(file.name);
+                if (file.module) {
+                        code = "(function(){return this}())." + file.module + " = (function(exports, global){" + code + "\n;return exports;})({}, (function(){return this}()));";
+                }
+                else if (file.hide) {
+                        code = "(function(){" + code + "}());";
+                }
+                return squeeze_it(code);
+        }).join("\n"));
+}
+else if (filename) {
         fs.readFile(filename, "utf8", function(err, text){
                 if (err) throw err;
                 output(squeeze_it(text));
         });
-} else {
+}
+else {
         var stdin = process.openStdin();
         stdin.setEncoding("utf8");
         var text = "";