feat: add project and app name validation script with comprehensive checks

ruff.toml

@@ -0,0 +1,29 @@
+# Ruff configuration for djinit
+
+line-length = 120
+target-version = "py38"
+
+[lint]
+select = [
+    "E",   # pycodestyle errors
+    "W",   # pycodestyle warnings
+    "F",   # pyflakes
+    "I",   # isort
+    "B",   # flake8-bugbear
+    "C4",  # flake8-comprehensions
+    "UP",  # pyupgrade
+]
+ignore = [
+    "E501",  # line too long (handled by formatter)
+    "E731",  # do not assign a lambda expression
+]
+
+[lint.per-file-ignores]
+"__init__.py" = ["F401"]  # imported but unused
+
+[format]
+docstring-code-format = true
+indent-style = "space"
+skip-magic-trailing-comma = false
+line-ending = "auto"
+

src/scripts/name_validator.py

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+"""
+Input validation utilities for Django project setup.
+Handles validation of project names, app names, and other user inputs.
+"""
+
+import keyword
+import re
+import sys
+from typing import Tuple
+
+# Names that conflict with Django's strcuture
+DJANGO_RESERVED = {"django", "test", "site-packages", "admin"}
+
+# Common Python builtin modules
+PYTHON_BUILTINS = set(sys.builtin_module_names)
+
+NAME_PATTERYN = re.compile(r"^[a-zA-Z][a-zA-Z0-9_]*$")
+
+def _validate_name(name:str, name_type: str = "name") -> Tuple[bool, str]:
+    if not name or not name.strip()
+        return False, f"{name_type.capitalize()} cannot be empty"
+
+    name = name.strip()
+
+    if len(name) < 2:
+        return False, f"{name_type.capitalize()} must be at least 2 characters long"
+
+    if len(name) > 50:
+        return False, f"{name_type.capitalize()} must be less than 50 characters"
+
+    if not NAME_PATTERYN.match(name):
+        return(
+            False,
+            f"{name_type.capitalize()} must start with a letter and contain only letters, numbers, and underscores"
+        )
+
+    if keyword.iskeyword(name):
+        return False, f"'{name}' is a Python keyword, Please choose a different name."
+
+    if name.lower() in PYTHON_BUILTINS:
+        return False, f"'{name}', conflicts with Python builtin module. Chooose a different name."
+
+    if name.startswith("_"):
+        return False, f"{name_type.capitalize()} should not start with underscore"
+
+    return True, ""
+
+def validate_project_name(name: str) -> Tuple[bool, str]:
+    return _validate_name(name, "project_name")
+
+def validate_app_name(name: str) -> Tuple[bool, str]:
+    return _validate_name(name, "app name")