update design build

gulpfile.babel.js

@@ -2,9 +2,12 @@ import gulp from 'gulp';
 import yargs from 'yargs';
 import webpack from 'webpack';
 import gutil from 'gulp-util';
+import gulpCopy from 'gulp-copy'
+import fs from 'fs';
 
 import FsHelper from './server/lib/fs_helper';
 import ComponentMapWriter from './server/lib/tasks/component_map_writer';
+import BuildDashboardAssets from './server/lib/tasks/build_dashboard_assets';
 import DB from './server/config/database';
 import {PowerDataSeed, HouseSeed} from './server/lib/tasks/seed_data';
 
@@ -28,8 +31,7 @@ gulp.task('save_house_csv', function(done){
 
 // right now, build only available for design.
 gulp.task('build', function(done) {
-  var config, env,
-    gulpCopy = require('gulp-copy');
+  var config, env;
 
   if (yargs.argv.design){
     process.env.NODE_ENV = 'design';
@@ -48,18 +50,27 @@ gulp.task('build', function(done) {
         gutil.log("[webpack]", stats.toString({}));
 
         if (yargs.argv.design){
+          var path = 'client/build/design/dashboard';
           // copy all react templates and their styles sheets into build/design/dashboard.
-         gulp.src([
-            `client/app.scss`
-          ]).pipe(gulpCopy(`client/build/design/dashboard`, {prefix: 1}));
+          FsHelper.rmdirAsync(path, ()=>{
+            console.log('path removed')
+            fs.mkdir(path, ()=>{
+              console.log('path recreated')
+              gulp.src([
+                `client/app.scss`
+              ]).pipe(gulpCopy(path, {prefix: 1}));
 
-          FsHelper.walk('client/dashboard', (err, files)=>{
-            var files_to_copy = files.filter((file)=>{
-              return /\.(rt|scss)$/.test(file)
-            });
-            gulp.src(files_to_copy)
-              .pipe(gulpCopy('client/build/design/dashboard', {prefix: 2}));
-            done()
+              FsHelper.walk('client/dashboard', (err, files)=>{
+                if (err){ console.log(err); done(); return false; }
+                var files_to_copy = files.filter((file)=>{
+                  return /\.(rt|scss)$/.test(file)
+                });
+                console.log(files_to_copy)
+                gulp.src(files_to_copy)
+                  .pipe(gulpCopy(path, {prefix: 2}));
+                done()
+              });
+            })
           });
         }