add --dry-run flag to publish task

gulpfile.js

@@ -47,10 +47,12 @@ var tscReporter = {
 
 var flagConfig = {
   string: ['port', 'version', 'ngVersion', 'animations'],
+  boolean: ['dry-run'],
   alias: {'p': 'port', 'v': 'version', 'a': 'ngVersion'},
   default: { port: 8000 }
 };
 
+
 var flags = minimist(process.argv.slice(2), flagConfig);
 
 gulp.task('build', function(done) {
@@ -408,21 +410,42 @@ gulp.task('demos', function(){
         path: path.join(path.dirname(file.path), 'index.html'),
       }));
       next(null, file);
-
-
     });
   }
 })
 
+gulp.task('bundle.demos', ['build.demos'], function(done){
+  var source = require('vinyl-source-stream'),
+    browserify = require('browserify'),
+    glob = require('glob'),
+    es = require('event-stream');
+
+  glob('dist/demos/**/index.js', function(err, files){
+    if (err) done(err);
+
+    var tasks = files.map(function(entry){
+      return browserify({ entries: [entry] })
+        .bundle()
+        .pipe(source(entry))
+        .pipe(gulp.dest('demo.bundle.js'));
+    });
+    es.merge(tasks).on('end', done);
+  })
+})
+
+gulp.task('demos', ['bundle.demos']);
+
 gulp.task('demos:all', ['demos'], function() {
    return gulp
     .src('dist/demos/component-docs/**/*')
-    .pipe(gulp.dest('dist/ionic-site/docs/v2/components/demo/')) 
+    .pipe(gulp.dest('dist/ionic-site/docs/v2/components/demo/'))
 });
 
 gulp.task('publish', function(done) {
   var version = flags.version;
   var ngVersion = flags.ngVersion;
+  var dryRun = flags['dry-run'];
+
   if (!version || !ngVersion) {
     console.error("\nERR: You need to provide a version for Ionic as well as " +
                   "the version of Angular it depends on.\n\n" +
@@ -451,11 +474,13 @@ gulp.task('publish', function(done) {
       fs.writeFileSync('dist/README.md', fs.readFileSync('scripts/npm/README.md'));
 
       // publish to npm
-      exec('cd dist && npm publish', function (err, stdout, stderr) {
+      if (!dryRun) {
-        console.log(stdout);
+        exec('cd dist && npm publish', function (err, stdout, stderr) {
-        console.error(stderr);
+          console.log(stdout);
-        done();
+          console.error(stderr);
-      });
+          done();
+        });
+      }
     }
   )
 })