detect if there is a connection error and pass it down to the ready function

Author: iurimatias

lib/contracts/code_generator.js

@@ -135,9 +135,9 @@ class CodeGenerator {
       } else {
         let connectionList = "[" + this.contractsConfig.dappConnection.map((x) => '"' + x + '"').join(',') + "]";
         if (self.env === 'development') {
-          web3Load = Templates.web3_connector({connectionList: connectionList, done: 'done();', warnAboutMetamask: true});
+          web3Load = Templates.web3_connector({connectionList: connectionList, done: 'done(err);', warnAboutMetamask: true});
         } else {
-          web3Load = Templates.web3_connector({connectionList: connectionList, done: 'done();', warnAboutMetamask: true});
+          web3Load = Templates.web3_connector({connectionList: connectionList, done: 'done(err);', warnAboutMetamask: true});
         }
       }
 

lib/contracts/code_templates/load-manager.js.ejs

@@ -1,4 +1,4 @@
-__mainContext.__LoadManager = function() { this.list = []; this.done = false; }
-__mainContext.__LoadManager.prototype.execWhenReady = function(cb) { if (this.done) { cb(); } else { this.list.push(cb) } }
-__mainContext.__LoadManager.prototype.doFirst = function(todo) { var self = this; todo(function() { self.done = true; self.list.map((x) => x.apply()) }) }
+__mainContext.__LoadManager = function() { this.list = []; this.done = false; this.err = null; }
+__mainContext.__LoadManager.prototype.execWhenReady = function(cb) { if (this.done) { cb(this.err); } else { this.list.push(cb) } }
+__mainContext.__LoadManager.prototype.doFirst = function(todo) { var self = this; todo(function(err) { self.done = true; self.err = err; self.list.map((x) => x.apply(x, [self.err])) }) }
 __mainContext.__loadManagerInstance = new __mainContext.__LoadManager();

lib/contracts/code_templates/web3-connector.js.ejs

@@ -25,12 +25,14 @@ __reduce(<%- connectionList %>,function(prev, value, next) {
   });
 }, function(err, _result) {
   __getAccounts(function(err, accounts) {
-    web3.eth.defaultAccount = accounts[0];
     <% if (warnAboutMetamask) { %>
-    if (web3.eth.currentProvider.isMetaMask) {
-      console.log("Note: Embark has detected you are in the development environment and using Metamask, please make sure Metamask is connected to your local node");
+    if (web3.eth.currentProvider && web3.eth.currentProvider.isMetaMask) {
+      console.log("%cNote: Embark has detected you are in the development environment and using Metamask, please make sure Metamask is connected to your local node", "font-size: 2em");
     }
     <% } %>
+    if (accounts) {
+      web3.eth.defaultAccount = accounts[0];
+    }
     <%- done  %>
   });
 });