* first action! (#1)

node_modules/nested-error-stacks/index.js

@@ -0,0 +1,48 @@
+var inherits = require('util').inherits;
+
+var NestedError = function (message, nested) {
+    this.nested = nested;
+
+    if (typeof message !== 'undefined') {
+        Object.defineProperty(this, 'message', {
+            value: message,
+            writable: true,
+            enumerable: false,
+            configurable: true
+        });
+    }
+
+    Error.captureStackTrace(this, this.constructor);
+    var oldStackDescriptor = Object.getOwnPropertyDescriptor(this, 'stack');
+    var stackDescriptor = buildStackDescriptor(oldStackDescriptor, nested);
+    Object.defineProperty(this, 'stack', stackDescriptor);
+};
+
+function buildStackDescriptor(oldStackDescriptor, nested) {
+    if (oldStackDescriptor.get) {
+        return {
+            get: function () {
+                var stack = oldStackDescriptor.get.call(this);
+                return buildCombinedStacks(stack, this.nested);
+            }
+        };
+    } else {
+        var stack = oldStackDescriptor.value;
+        return {
+            value: buildCombinedStacks(stack, nested)
+        };
+    }
+}
+
+function buildCombinedStacks(stack, nested) {
+    if (nested) {
+        stack += '\nCaused By: ' + nested.stack;
+    }
+    return stack;
+}
+
+inherits(NestedError, Error);
+NestedError.prototype.name = 'NestedError';
+
+
+module.exports = NestedError;