From 42f37b4e98e6f9621af4f1da40e831525f65fc0e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Erik=20Pedersen?=
 <bjorn.erik.pedersen@gmail.com>
Date: Fri, 18 Oct 2024 10:30:36 +0200
Subject: [PATCH] tpl/transform: Don't fail on "no data to transform"

Fixes #12964
---
 tpl/transform/unmarshal.go      | 3 ++-
 tpl/transform/unmarshal_test.go | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tpl/transform/unmarshal.go b/tpl/transform/unmarshal.go
index 898085661cd..0068947f6d5 100644
--- a/tpl/transform/unmarshal.go
+++ b/tpl/transform/unmarshal.go
@@ -112,9 +112,10 @@ func (ns *Namespace) Unmarshal(args ...any) (any, error) {
 	if err != nil {
 		return nil, fmt.Errorf("type %T not supported", data)
 	}
+	dataStr = strings.TrimSpace(dataStr)
 
 	if dataStr == "" {
-		return nil, errors.New("no data to transform")
+		return nil, nil
 	}
 
 	key := hashing.MD5FromStringHexEncoded(dataStr)
diff --git a/tpl/transform/unmarshal_test.go b/tpl/transform/unmarshal_test.go
index 1b976c449ad..d65f05fd42e 100644
--- a/tpl/transform/unmarshal_test.go
+++ b/tpl/transform/unmarshal_test.go
@@ -139,6 +139,8 @@ func TestUnmarshal(t *testing.T) {
 a;b;c`, mime: media.Builtin.CSVType}, map[string]any{"DElimiter": ";", "Comment": "%"}, func(r [][]string) {
 			b.Assert([][]string{{"a", "b", "c"}}, qt.DeepEquals, r)
 		}},
+		{``, nil, nil},
+		{`   `, nil, nil},
 		// errors
 		{"thisisnotavaliddataformat", nil, false},
 		{testContentResource{key: "r1", content: `invalid&toml"`, mime: media.Builtin.TOMLType}, nil, false},