check-no-external-libs.yml

name: Check No External Libraries

on: pull_request

jobs:
  check-no-external-libs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: "3.9"

      - name: Ensure no external libraries are imported
        run: |
          python -c "
          import os
          import ast

          allowed_modules = {'sys', 'os', 'math', 'random', 'datetime', 're'}

          def check_imports(file_path):
              with open(file_path, 'r', encoding='utf-8') as f:
                  tree = ast.parse(f.read(), filename=file_path)
                  for node in ast.walk(tree):
                      if isinstance(node, ast.Import):
                          for alias in node.names:
                              if alias.name not in allowed_modules:
                                  raise SystemExit(f'❌ External library detected: {alias.name} in {file_path}')
                      elif isinstance(node, ast.ImportFrom):
                          if node.module and node.module not in allowed_modules:
                              raise SystemExit(f'❌ External library detected: {node.module} in {file_path}')

          for root, _, files in os.walk('src'):
              for file in files:
                  if file.endswith('.py'):
                      check_imports(os.path.join(root, file))"