Handle a native angular minErr by deconstructing it

Fixes GH-243

See: https://github.com/angular/angular.js/blob/v1.4.7/src/minErr.js

Author: mattrobenolt

src/raven.js

@@ -481,7 +481,8 @@ function triggerEvent(eventType, options) {
 }
 
 var dsnKeys = 'source protocol user pass host port path'.split(' '),
-    dsnPattern = /^(?:(\w+):)?\/\/(?:(\w+)(:\w+)?@)?([\w\.-]+)(?::(\d+))?(\/.*)/;
+    dsnPattern = /^(?:(\w+):)?\/\/(?:(\w+)(:\w+)?@)?([\w\.-]+)(?::(\d+))?(\/.*)/,
+    angularPattern = /^\[((?:[$a-zA-Z0-9]+:)?(?:[$a-zA-Z0-9]+))\] (.+?)\n(\S+)$/;
 
 function RavenConfigError(message) {
     this.name = 'RavenConfigError';
@@ -568,7 +569,19 @@ function each(obj, callback) {
 }
 
 function handleStackInfo(stackInfo, options) {
-    var frames = [];
+    var frames = [],
+        matches = angularPattern.exec(stackInfo.message);
+
+    if (matches) {
+        stackInfo.name = matches[1];
+        stackInfo.message = matches[2];
+        // auto set a new tag specifically for the angular error url
+        options = options || {};
+        options.extra = objectMerge({
+            // Truncate this message pretty short since it can be insane.
+            ref: truncate(matches[3], 250)
+        }, options.extra);
+    }
 
     if (stackInfo.stack && stackInfo.stack.length) {
         each(stackInfo.stack, function(i, stack) {

test/raven.test.js

@@ -1553,6 +1553,28 @@ describe('globals', function() {
                 'new <anonymous>', 'hey', 'http://example.com', 10, [], undefined
             ]);
         });
+
+        it('should extract angularjs specific error messages', function() {
+            this.sinon.stub(window, 'normalizeFrame').returns(undefined);
+            this.sinon.stub(window, 'processException');
+
+            var stackInfo = {
+                name: 'Error',
+                message: '[$foo:bar] thing happened\nhttp://errors.angularjs.org/cool/story',
+                url: 'http://example.com',
+                lineno: 10
+            };
+
+            handleStackInfo(stackInfo);
+            assert.deepEqual(window.processException.lastCall.args, [
+                '$foo:bar',
+                'thing happened',
+                'http://example.com',
+                10,
+                [],
+                {extra: {ref: 'http://errors.angularjs.org/cool/story'}}
+            ]);
+        });
     });
 
     describe('joinRegExp', function() {