Added checks for runserver_plus management command to give a nice e…

…rror messages, when `django-extensions` and `Werkzeug` are not properly installed.

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.4.1 (Unreleased)
+
+- Added checks for `runserver_plus` management command to give a nice error messages, when `django-extensions` and `Werkzeug` are not properly installed.
+
 ## 2.4.0
 
 - Back to Poetry for project management.

src/django_tailwind_cli/management/commands/tailwind.py

@@ -1,5 +1,6 @@
 """`tailwind` management command."""
 
+import importlib.util
 import os
 import shutil
 import ssl
@@ -52,7 +53,7 @@ def add_arguments(self, parser: Any) -> None:
 
         runserver_plus_parser = subparsers.add_parser(
             "runserver_plus",
-            help="Start the Django Extensions runserver_plus development server and the Tailwind CLI in watch mode.",
+            help="Start the django-extensions runserver_plus development server and the Tailwind CLI in watch mode.",
         )
 
         runserver_plus_parser.add_argument("addrport", nargs="?", help="Optional port number, or ipaddr:port")
@@ -88,9 +89,16 @@ def handle(self, *_args: Any, **kwargs: Any) -> None:
             self.build()
         elif label == "watch":
             self.watch()
-        elif label in ("runserver", "runserver_plus"):  # pragma: no cover
-            kwargs["runserver_cmd"] = label
+        elif label == "runserver":  # pragma: no cover
+            kwargs["runserver_cmd"] = "runserver"
             self.runserver(**kwargs)
+        elif label == "runserver_plus":  # pragma: no cover
+            if importlib.util.find_spec("django_extensions") and importlib.util.find_spec("werkzeug"):
+                kwargs["runserver_cmd"] = "runserver"
+                self.runserver(**kwargs)
+            else:
+                msg = "Missing dependencies. Follow the instructions found on https://django-tailwind-cli.andrich.me/installation/."
+                raise CommandError(msg)
         elif label == "list_templates":
             self.list_templates()