implement watch functionality

lib/index.js

@@ -1,9 +1,11 @@
+/*jshint esversion: 6 */
 var async = require('async');
 var Web3 = require('web3');
 var fs = require('fs');
 var grunt = require('grunt');
 var mkdirp = require('mkdirp');
 var colors = require('colors');
+var chokidar = require('chokidar');
 
 var Deploy = require('./deploy.js');
 var ContractsManager = require('./contracts.js');
@@ -71,7 +73,7 @@ var Embark = {
     }
   },
 
-  server: function() {
+  server: function(callback) {
     var finalhandler = require('finalhandler');
     var http = require('http');
     var serveStatic = require('serve-static');
@@ -85,13 +87,41 @@ var Embark = {
     });
 
     // Listen 
-    console.log("listening on port 8000".underline.bgWhite.green);
+    console.log("listening on port 8000".underline.green);
     server.listen(8000) ;
+    callback();
+  },
+
+  watch: function() {
+    var embarkConfig = JSON.parse(fs.readFileSync("embark.json"));
+
+    var appConfig = embarkConfig.app;
+    var filesToWatch = [];
+
+    for(var targetFile in appConfig) {
+      filesToWatch.push(appConfig[targetFile]);
+    }
+
+    console.log(filesToWatch);
+    var watcher = chokidar.watch(filesToWatch, {
+      ignored: /[\/\\]\./,
+      persistent: true,
+      ignoreInitial: true,
+      followSymlinks: true
+    });
+    watcher
+    .on('add', path => console.log(`File ${path} has been added`))
+    .on('change', path => console.log(`File ${path} has been changed`))
+    .on('unlink', path => console.log(`File ${path} has been removed`))
+    .on('ready', () => console.log('ready to watch changes'));
+    console.log("done!");
   }
 };
 
 //module.exports = Embark;
 
-//Embark.buildAssets();
-//Embark.server()
+Embark.buildAssets();
+Embark.server(function() {
+  Embark.watch();
+});
 

package.json

@@ -15,6 +15,7 @@
   "dependencies": {
     "async": "^2.0.1",
     "bignumber.js": "debris/bignumber.js#master",
+    "chokidar": "^1.6.0",
     "colors": "^1.1.2",
     "commander": "^2.8.1",
     "finalhandler": "^0.5.0",