Add a page template func

Fixes #9339

tpl/internal/go_templates/texttemplate/hugo_template.go

@@ -60,29 +60,29 @@ func NewExecuter(helper ExecHelper) Executer {
 }
 
 type (
-	dataContextKeyType    string
+	pageContextKeyType    string
 	hasLockContextKeyType string
 	stackContextKeyType   string
 )
 
 const (
-	// The data object passed to Execute or ExecuteWithContext gets stored with this key if not already set.
-	DataContextKey = dataContextKeyType("data")
+	// The data page passed to ExecuteWithContext gets stored with this key.
+	PageContextKey = pageContextKeyType("page")
 	// Used in partialCached to signal to nested templates that a lock is already taken.
 	HasLockContextKey = hasLockContextKeyType("hasLock")
 )
 
 // Note: The context is currently not fully implemeted in Hugo. This is a work in progress.
 func (t *executer) ExecuteWithContext(ctx context.Context, p Preparer, wr io.Writer, data any) error {
+	if ctx == nil {
+		panic("nil context")
+	}
+
 	tmpl, err := p.Prepare()
 	if err != nil {
 		return err
 	}
 
-	if v := ctx.Value(DataContextKey); v == nil {
-		ctx = context.WithValue(ctx, DataContextKey, data)
-	}
-
 	value, ok := data.(reflect.Value)
 	if !ok {
 		value = reflect.ValueOf(data)
@@ -102,28 +102,6 @@ func (t *executer) ExecuteWithContext(ctx context.Context, p Preparer, wr io.Wri
 	return tmpl.executeWithState(state, value)
 }
 
-func (t *executer) Execute(p Preparer, wr io.Writer, data any) error {
-	tmpl, err := p.Prepare()
-	if err != nil {
-		return err
-	}
-
-	value, ok := data.(reflect.Value)
-	if !ok {
-		value = reflect.ValueOf(data)
-	}
-
-	state := &state{
-		helper: t.helper,
-		prep:   p,
-		tmpl:   tmpl,
-		wr:     wr,
-		vars:   []variable{{"$", value}},
-	}
-
-	return tmpl.executeWithState(state, value)
-}
-
 // Prepare returns a template ready for execution.
 func (t *Template) Prepare() (*Template, error) {
 	return t, nil