add ascii_only for uglifyjs, Fix #996

lib/build.js

@@ -175,7 +175,11 @@ function buildFiles(files, args) {
           $.transport(opt),
           $.if(isJS, pipe(
             $.if(isStandalone, standalonify(args)),
-            $.uglify()
+            $.uglify({
+              output: {
+                ascii_only: true
+              }
+            })
           ), $.cssmin()),
           $.size2({
             gzip: true,

tests/build.js

@@ -311,6 +311,18 @@ describe('build', function() {
     });
   });
 
+  it('uglifyjs with ascii-only', function(done) {
+    var opt = {
+      cwd: join(base, 'uglifyjs-ascii-only'),
+      dest: dest
+    };
+    build(opt, function(err) {
+      should.not.exist(err);
+      assets('uglifyjs-ascii-only', dest);
+      done();
+    });
+  });
+
   function assets(prefix, dest) {
     var expect = join(base, 'expect', prefix);
     var expectFiles = glob.sync('**/*', {cwd: expect});

tests/build/expect/uglifyjs-ascii-only/a/0.1.0/index-debug.js

@@ -0,0 +1,3 @@
+define("a/0.1.0/index-debug", [], function(require, exports, module) {
+  '中';
+});

tests/build/expect/uglifyjs-ascii-only/a/0.1.0/index.js

@@ -0,0 +1 @@
+define("a/0.1.0/index",[],function(){"\u4e2d"});

tests/build/uglifyjs-ascii-only/index.js

@@ -0,0 +1 @@
+'中';

tests/build/uglifyjs-ascii-only/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "a",
+  "version": "0.1.0",
+  "spm": {
+  }
+}