feature(@package/embarkjs): warn when a embarkjs plugin might be missing

Author: iurimatias

packages/embarkjs/embarkjs/src/lib/blockchain.js

@@ -78,6 +78,10 @@ Blockchain.setProvider = function(providerName, options) {
   let provider = this.Providers[providerName];
 
   if (!provider) {
+    if (providerName === 'web3') {
+      console.log("the embarkjs-web3 package might be missing from your project dependencies");
+    }
+
     throw new Error([
       'Unknown blockchain provider. Make sure to register it first using',
       'EmbarkJS.Blockchain.registerProvider(providerName, providerObject)'

packages/embarkjs/embarkjs/src/lib/messages.js

@@ -10,7 +10,10 @@ Messages.setProvider = function (providerName, options) {
   let provider = this.Providers[providerName];
 
   if (!provider) {
-    throw new Error('Unknown messages provider');
+    if (providerName === 'whisper') {
+      console.log("the embarkjs-whisper package might be missing from your project dependencies");
+    }
+    throw new Error('Unknown messages provider: ' + providerName);
   }
 
   this.currentProviderName = providerName;

packages/embarkjs/embarkjs/src/lib/names.js

@@ -11,7 +11,10 @@ Names.setProvider = function(providerName, options) {
   let provider = this.Providers[providerName];
 
   if (!provider) {
-    throw new Error('Unknown name system provider');
+    if (providerName === 'ens') {
+      console.log("the embarkjs-ens package might be missing from your project dependencies");
+    }
+    throw new Error('Unknown name system provider: ' + providerName);
   }
 
   this.currentProviderName = providerName;

packages/embarkjs/embarkjs/src/lib/storage.js

@@ -56,7 +56,13 @@ Storage.setProvider = function (providerName, options) {
   let provider = this.Providers[providerName];
 
   if (!provider) {
-    throw new Error('Unknown storage provider');
+    if (providerName === 'ipfs') {
+      console.log("the embarkjs-ipfs package might be missing from your project dependencies");
+    }
+    if (providerName === 'swarm') {
+      console.log("the embarkjs-swarm package might be missing from your project dependencies");
+    }
+    throw new Error('Unknown storage provider: ' + providerName);
   }
 
   this.currentProviderName = providerName;