fix rendering objects

internal/renderer/processor.go

@@ -5,6 +5,8 @@ import (
 	"math"
 	"strings"
 	"time"
+
+	"gopkg.in/yaml.v3"
 )
 
 var (
@@ -41,6 +43,8 @@ var (
 		"second":  second,
 		// types processors
 		"bool": boolean,
+		// converters
+		"toYaml": toYaml,
 	}
 )
 
@@ -90,3 +94,11 @@ func boolean(s string) (bool, error) {
 		return false, fmt.Errorf("cannot convert %s to boolean", s)
 	}
 }
+
+func toYaml(in interface{}) string {
+	raw, err := yaml.Marshal(in)
+	if err != nil {
+		return ""
+	}
+	return strings.TrimSuffix(string(raw), "\n")
+}

internal/renderer/renderer.go

@@ -2,6 +2,8 @@ package renderer
 
 import (
 	"bytes"
+	"fmt"
+	"strings"
 	"text/template"
 
 	"gopkg.in/yaml.v3"
@@ -17,6 +19,13 @@ var (
 		Funcs(processors).
 		Option("missingkey=error").
 		Delims(leftDelim, rightDelim)
+
+	replacer = strings.NewReplacer(
+		leftDelim,
+		fmt.Sprintf("%s toYaml (", leftDelim),
+		rightDelim,
+		fmt.Sprintf(") %s", rightDelim),
+	)
 )
 
 type Renderable struct {
@@ -44,7 +53,6 @@ func (r *Renderable) init(value interface{}) error {
 			return err
 		}
 	}
-
 	return nil
 }
 
@@ -58,6 +66,11 @@ func newRenderable(value interface{}) (*Renderable, error) {
 }
 
 func (r *Renderable) UnmarshalYAML(n *yaml.Node) error {
+	if n.Kind == yaml.ScalarNode {
+		if strings.HasPrefix(n.Value, leftDelim) && strings.HasSuffix(n.Value, rightDelim) {
+			n.Value = replacer.Replace(n.Value)
+		}
+	}
 	var value interface{}
 	err := n.Decode(&value)
 	if err != nil {