text: import os
  
  from django.apps import apps
  from django.conf import settings
  
  from .utils import get_tailwind_src_path
  
  
  class ValidationError(Exception):
      pass
  
  
  class Validations:
      def acceptable_label(self, label):
          if label not in ["init", "install", "npm", "start", "build", "deploy"]:
  
              raise ValidationError(f"Subcommand {label} doesn't exist")
  
      def is_installed(self, app_name):
          if not apps.is_installed(app_name):
              raise ValidationError(f"{app_name} is not in INSTALLED_APPS")
  
      def is_tailwind_app(self, app_name):
          if not os.path.isfile(
              os.path.join(get_tailwind_src_path(app_name), "tailwind.config.js")
          ):
              raise ValidationError(f"'{app_name}' isn't a Tailwind app")
  
      def has_settings(self):
          if not hasattr(settings, "TAILWIND_APP_NAME"):
              raise ValidationError("TAILWIND_APP_NAME isn't set in settings.py")
  