1 files changed, 24 insertions, 0 deletions
diff --git a/internal/texttemplate/exec.go b/internal/texttemplate/exec.go
new file mode 100644
index 00000000..f4906cb3
--- /dev/null
+++ b/internal/texttemplate/exec.go
@@ -0,0 +1,24 @@
+// Taken and adapted from the stdlib text/template/funcs.go.
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package texttemplate
+
+import (
+	"reflect"
+)
+
+// indirectInterface returns the concrete value in an interface value,
+// or else the zero reflect.Value.
+// That is, if v represents the interface value x, the result is the same as reflect.ValueOf(x):
+// the fact that x was an interface value is forgotten.
+func indirectInterface(v reflect.Value) reflect.Value {
+	if v.Kind() != reflect.Interface {
+		return v
+	}
+	if v.IsNil() {
+		return reflect.Value{}
+	}
+	return v.Elem()
+}