Look for ROLLBACK_COMPLETE when polling event and exit if found

Fix SomeoneWeird#12

src/utils.js

@@ -96,10 +96,9 @@ export default function (argv, cloudformation) {
     for (let key in params) {
       let value = params[key]
 
-      // Exit nicely if value is not a string instead of crashing on value.match()
-      if (typeof(value) !== "string") {
-        console.error(`Invalid parameter type: ${key} value is a ${typeof(value)}. Only strings are allowed in parameters file.`)
-        process.exit(1)
+      if (typeof(value) != "string") {
+        console.error(`Invalid parameter type: ${key} is a ${typeof(value)}, not a string`)
+        process
       }
 
       let match = value.match(/<<(.+)>>/)
@@ -264,6 +263,18 @@ export default function (argv, cloudformation) {
   }
 
   function pollEvents (stackName, actionName, matches, callback, opts = {}) {
+    const failureMatches = [
+      [ 'LogicalResourceId', stackName ],
+      [ 'ResourceStatus', 'ROLLBACK_COMPLETE' ]
+    ]
+    const failureCallback = function (err) {
+      if (err) {
+        throw err
+      }
+      console.log(`${stackName} failed!`.red)
+      process.exit()
+    }
+
     function checkEvents (lastDate) {
       const now = new Date()
 
@@ -295,8 +306,16 @@ export default function (argv, cloudformation) {
             spinner.destroy()
             return callback()
           }
+          if (failureMatches.every(function (match) {
+            return events[i][match[0]] === match[1]
+          })) {
+            spinner.destroy()
+            return failureCallback()
+          }
         }
 
+
+
         return next()
 
         function next () {