2 files changed, 37 insertions, 17 deletions
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index e1c5d5d86b..4e5c96cd0f 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -256,31 +256,27 @@ func NewFuncMap() []template.FuncMap {
 		"DefaultTheme": func() string {
 			return setting.UI.DefaultTheme
 		},
+		// pass key-value pairs to a partial template which receives them as a dict
 		"dict": func(values ...interface{}) (map[string]interface{}, error) {
 			if len(values) == 0 {
 				return nil, errors.New("invalid dict call")
 			}
 
 			dict := make(map[string]interface{})
+			return util.MergeInto(dict, values...)
+		},
+		/* like dict but merge key-value pairs into the first dict and return it */
+		"mergeinto": func(root map[string]interface{}, values ...interface{}) (map[string]interface{}, error) {
+			if len(values) == 0 {
+				return nil, errors.New("invalid mergeinto call")
+			}
 
-			for i := 0; i < len(values); i++ {
-				switch key := values[i].(type) {
-				case string:
-					i++
-					if i == len(values) {
-						return nil, errors.New("specify the key for non array values")
-					}
-					dict[key] = values[i]
-				case map[string]interface{}:
-					m := values[i].(map[string]interface{})
-					for i, v := range m {
-						dict[i] = v
-					}
-				default:
-					return nil, errors.New("dict values must be maps")
-				}
+			dict := make(map[string]interface{})
+			for key, value := range root {
+				dict[key] = value
 			}
-			return dict, nil
+
+			return util.MergeInto(dict, values...)
 		},
 		"percentage": func(n int, values ...int) float32 {
 			var sum = 0
diff --git a/modules/util/util.go b/modules/util/util.go
index 6d02b5f52f..9de1710ac7 100644
--- a/modules/util/util.go
+++ b/modules/util/util.go
@@ -6,6 +6,7 @@ package util
 
 import (
 	"bytes"
+	"errors"
 	"strings"
 )
 
@@ -100,3 +101,26 @@ func NormalizeEOL(input []byte) []byte {
 	}
 	return tmp[:pos]
 }
+
+// MergeInto merges pairs of values into a "dict"
+func MergeInto(dict map[string]interface{}, values ...interface{}) (map[string]interface{}, error) {
+	for i := 0; i < len(values); i++ {
+		switch key := values[i].(type) {
+		case string:
+			i++
+			if i == len(values) {
+				return nil, errors.New("specify the key for non array values")
+			}
+			dict[key] = values[i]
+		case map[string]interface{}:
+			m := values[i].(map[string]interface{})
+			for i, v := range m {
+				dict[i] = v
+			}
+		default:
+			return nil, errors.New("dict values must be maps")
+		}
+	}
+
+	return dict, nil
+}