from __future__ import absolute_import from pylint.checkers import BaseChecker from pylint.checkers.utils import check_messages from pylint_django.__pkginfo__ import BASE_ID class DjangoInstalledChecker(BaseChecker): name = "django-installed-checker" msgs = { # pylint: disable=implicit-str-concat f"F{BASE_ID}01": ( "Django is not available on the PYTHONPATH", "django-not-available", "Django could not be imported by the pylint-django plugin, so most Django related " "improvements to pylint will fail.", ), f"W{BASE_ID}99": ( "Placeholder message to prevent disabling of checker", "django-not-available-placeholder", "PyLint does not recognise checkers as being enabled unless they have at least" " one message which is not fatal...", ), } @check_messages("django-not-available") def open(self): try: __import__("django") except ImportError: # mild hack: this error is added before any modules have been inspected # so we need to set some kind of value to prevent the linter failing to it self.linter.set_current_module("pylint_django") self.add_message("django-not-available")