tpl/partials: Allow any key type in partialCached

Fixes #6572

resources/internal/key.go

@@ -13,11 +13,7 @@
 
 package internal
 
-import (
-	"strconv"
-
-	"github.com/mitchellh/hashstructure"
-)
+import "github.com/gohugoio/hugo/helpers"
 
 // ResourceTransformationKey are provided by the different transformation implementations.
 // It identifies the transformation (name) and its configuration (elements).
@@ -42,23 +38,6 @@ func (k ResourceTransformationKey) Value() string {
 		return k.Name
 	}
 
-	return k.Name + "_" + HashString(k.elements...)
+	return k.Name + "_" + helpers.HashString(k.elements...)
 
 }
-
-// HashString returns a hash from the given elements.
-// It will panic if the hash cannot be calculated.
-func HashString(elements ...interface{}) string {
-	var o interface{}
-	if len(elements) == 1 {
-		o = elements[0]
-	} else {
-		o = elements
-	}
-
-	hash, err := hashstructure.Hash(o, nil)
-	if err != nil {
-		panic(err)
-	}
-	return strconv.FormatUint(hash, 10)
-}