Jsonpath.go

func JSONPatchPathHasForwardSlash(patch string) bool {
  
  jsonPatch, err := yaml.ToJSON([]byte(patch))
	if err != nil {
		return err
	}

	decodedPatch, err := jsonpatch.DecodePatch(jsonPatch)
	if err != nil {
		return err
	}

	for _, operation := range decodedPatch {
		path, err := operation.Path()
		if err != nil {
			return err
		}
		
		out ,err := regexp.MatchString(`^/`, path)
		if err != nil{
			return fmt.Errorf("Path :" , err)
		}
		
		return out
		
		//vars := variables.RegexVariables.FindAllString(path, -1)
		//if len(vars) > 0 {
			//return fmt.Errorf("Operation \"%s\" has forbidden variables", operation.Kind())
		//}
	}

	return nil


}


//https://github.com/kyverno/kyverno/blob/0fdd349849eeee491fdf6aa651eea6d0422f2a97/pkg/policy/validate.go#L52

for i, rule := range p.Spec.Rules {
	
	.....
	
	if JSONPatchPathHasForwardSlash(rule) {
		return fmt.Errorf("path: spec.rules[%d]: %v", i, err)
	}
	
	.....

}