1 files changed, 23 insertions, 14 deletions
diff --git a/vendor/github.com/mitchellh/mapstructure/mapstructure.go b/vendor/github.com/mitchellh/mapstructure/mapstructure.go
index b0ab89b..b0ab9a3 100644
--- a/vendor/github.com/mitchellh/mapstructure/mapstructure.go
+++ b/vendor/github.com/mitchellh/mapstructure/mapstructure.go
@@ -1,5 +1,5 @@
 // The mapstructure package exposes functionality to convert an
-// abitrary map[string]interface{} into a native Go structure.
+// arbitrary map[string]interface{} into a native Go structure.
 //
 // The Go structure can be arbitrarily complex, containing slices,
 // other structs, etc. and the decoder will properly decode nested
@@ -546,7 +546,12 @@ func (d *Decoder) decodePtr(name string, data interface{}, val reflect.Value) er
 	// into that. Then set the value of the pointer to this type.
 	valType := val.Type()
 	valElemType := valType.Elem()
-	realVal := reflect.New(valElemType)
+
+	realVal:=val
+	if realVal.IsNil() || d.config.ZeroFields {
+		realVal = reflect.New(valElemType)
+	}
+
 	if err := d.decode(name, data, reflect.Indirect(realVal)); err != nil {
 		return err
 	}
@@ -562,20 +567,24 @@ func (d *Decoder) decodeSlice(name string, data interface{}, val reflect.Value)
 	valElemType := valType.Elem()
 	sliceType := reflect.SliceOf(valElemType)
 
-	// Check input type
-	if dataValKind != reflect.Array && dataValKind != reflect.Slice {
-		// Accept empty map instead of array/slice in weakly typed mode
-		if d.config.WeaklyTypedInput && dataVal.Kind() == reflect.Map && dataVal.Len() == 0 {
-			val.Set(reflect.MakeSlice(sliceType, 0, 0))
-			return nil
-		} else {
-			return fmt.Errorf(
-				"'%s': source data must be an array or slice, got %s", name, dataValKind)
+	valSlice:=val
+	if valSlice.IsNil() || d.config.ZeroFields {
+
+		// Check input type
+		if dataValKind != reflect.Array && dataValKind != reflect.Slice {
+			// Accept empty map instead of array/slice in weakly typed mode
+			if d.config.WeaklyTypedInput && dataVal.Kind() == reflect.Map && dataVal.Len() == 0 {
+				val.Set(reflect.MakeSlice(sliceType, 0, 0))
+				return nil
+			} else {
+				return fmt.Errorf(
+					"'%s': source data must be an array or slice, got %s", name, dataValKind)
+			}
 		}
-	}
 
-	// Make a new slice to hold our result, same size as the original data.
-	valSlice := reflect.MakeSlice(sliceType, dataVal.Len(), dataVal.Len())
+		// Make a new slice to hold our result, same size as the original data.
+		valSlice = reflect.MakeSlice(sliceType, dataVal.Len(), dataVal.Len())
+	}
 
 	// Accumulate any errors
 	errors := make([]string, 0)