mini_4.js

gulp.task('js', ['jshint'], function () {
  var source = pkg.paths.js;
  return gulp.src(source)
    .pipe(sourcemaps.init())
    .pipe(concat('all.min.js', {newLine: ';'}))
    .pipe(ngAnnotate({
        add: true
    }))
    .pipe(bytediff.start())
    .pipe(uglify({mangle: true}))
    .pipe(bytediff.stop())
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest(pkg.paths.dev));
});