tpl/partials: Allow any key type in partialCached

Fixes #6572

2 files changed, 27 insertions, 0 deletions

diff --git a/helpers/general.go b/helpers/general.go
index 699ddeb53..aa1e00d3a 100644
--- a/helpers/general.go
+++ b/helpers/general.go
@@ -23,11 +23,14 @@ import (
 	"os"
 	"path/filepath"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"unicode"
 	"unicode/utf8"
 
+	"github.com/mitchellh/hashstructure"
+
 	"github.com/gohugoio/hugo/hugofs"
 
 	"github.com/gohugoio/hugo/common/hugo"
@@ -482,3 +485,20 @@ func PrintFs(fs afero.Fs, path string, w io.Writer) {
 		return nil
 	})
 }
+
+// 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)
+}
diff --git a/helpers/general_test.go b/helpers/general_test.go
index b8a98fb69..104a4c35d 100644
--- a/helpers/general_test.go
+++ b/helpers/general_test.go
@@ -408,3 +408,10 @@ func BenchmarkUniqueStrings(b *testing.B) {
 	})
 
 }
+
+func TestHashString(t *testing.T) {
+	c := qt.New(t)
+
+	c.Assert(HashString("a", "b"), qt.Equals, "2712570657419664240")
+	c.Assert(HashString("ab"), qt.Equals, "590647783936702392")
+}