fix: improve unmarshal error

Author: FabianKramm

pkg/util/yamlutil/yaml.go

@@ -43,6 +43,17 @@ func Unmarshal(data []byte, out interface{}) error {
 func prettifyError(data []byte, err error) error {
 	// check if type error
 	if typeError, ok := err.(*yaml.TypeError); ok {
+		// print the config with lines
+		lines := strings.Split(string(data), "\n")
+		extraLines := []string{"Parsed Config:"}
+		for i, v := range lines {
+			if v == "" {
+				continue
+			}
+			extraLines = append(extraLines, fmt.Sprintf("  %d: %s", i+1, v))
+		}
+		extraLines = append(extraLines, "Errors:")
+
 		for i := range typeError.Errors {
 			typeError.Errors[i] = strings.ReplaceAll(typeError.Errors[i], "!!seq", "an array")
 			typeError.Errors[i] = strings.ReplaceAll(typeError.Errors[i], "!!str", "string")
@@ -58,11 +69,14 @@ func prettifyError(data []byte, err error) error {
 					line = line - 1
 					lines := strings.Split(string(data), "\n")
 					if line < len(lines) {
-						typeError.Errors[i] += fmt.Sprintf(" (line %d: %s)", line+1, strings.TrimSpace(lines[line]))
+						typeError.Errors[i] = "  " + typeError.Errors[i] + fmt.Sprintf(" (line %d: %s)", line+1, strings.TrimSpace(lines[line]))
 					}
 				}
 			}
 		}
+
+		extraLines = append(extraLines, typeError.Errors...)
+		typeError.Errors = extraLines
 	}
 
 	return err