text: """
  Base settings to build other settings files upon.
  """
  import subprocess
  
  import environ
  
  ROOT_DIR = (
      environ.Path(__file__) - 3
  )  # (navoica_enroll/config/settings/base.py - 3 = navoica_enroll/)
  APPS_DIR = ROOT_DIR.path("navoica_enroll")
  
  env = environ.Env(
      NAVOICA_URL=(str, "https://navoica.pl"),
  
      STATEMENT1_PDF=(str, 'pdfs/wzor_oswiadczenia_uczestnika_projektu.pdf'),
      STATEMENT2_PDF=(str, 'pdfs/przetwarzanie_danych.pdf'),
  
      STATEMENT1_EN_PDF=(str, 'pdfs/minimum_scope_of_the_participants_personal_data.pdf'),
      STATEMENT2_EN_PDF=(str, 'pdfs/process_personal_data.pdf'),
  )
  
  READ_DOT_ENV_FILE = env.bool("DJANGO_READ_DOT_ENV_FILE", default=False)
  if READ_DOT_ENV_FILE:
      # OS environment variables take precedence over variables from .env
      env.read_env(str(ROOT_DIR.path(".env")))
  
  # GENERAL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#debug
  DEBUG = env.bool("DJANGO_DEBUG", False)
  # Local time zone. Choices are
  # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
  # though not all of them may be available with every OS.
  # In Windows, this must be set to your system time zone.
  TIME_ZONE = "UTC"
  # https://docs.djangoproject.com/en/dev/ref/settings/#language-code
  LANGUAGE_CODE = "en"
  # https://docs.djangoproject.com/en/dev/ref/settings/#site-id
  SITE_ID = 1
  # https://docs.djangoproject.com/en/dev/ref/settings/#use-i18n
  USE_I18N = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#use-l10n
  USE_L10N = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#use-tz
  USE_TZ = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#locale-paths
  LOCALE_PATHS = [ROOT_DIR.path("locale")]
  
  # DATABASES
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#databases
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.postgresql',
          'NAME': env("POSTGRES_DB"),
          'USER': env("POSTGRES_USER"),
          'PASSWORD': env("POSTGRES_PASSWORD"),
          'HOST': env("POSTGRES_HOST"),
          'PORT': env("POSTGRES_PORT"),
      }
  }
  
  DATABASES["default"]["ATOMIC_REQUESTS"] = True
  
  # URLS
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#root-urlconf
  ROOT_URLCONF = "config.urls"
  # https://docs.djangoproject.com/en/dev/ref/settings/#wsgi-application
  WSGI_APPLICATION = "config.wsgi.application"
  
  # APPS
  # ------------------------------------------------------------------------------
  DJANGO_APPS = [
      "django.contrib.auth",
      "django.contrib.contenttypes",
      "django.contrib.sessions",
      "django.contrib.sites",
      "django.contrib.messages",
      "django.contrib.staticfiles",
      # "django.contrib.humanize", # Handy template tags
      "django.contrib.admin",
      "django.forms",
  ]
  THIRD_PARTY_APPS = [
      "crispy_forms",
      "allauth",
      "allauth.account",
      "allauth.socialaccount",
      'navoica_enroll.providers.edx',
      "rest_framework",
      'localflavor',
      'django_csv_exports',
  ]
  
  NAVOICA_URL = env.str("NAVOICA_URL")
  
  SOCIALACCOUNT_PROVIDERS = {
      'edx': {
          'EDX_URL': NAVOICA_URL,
          'AUTH_PARAMS': {'token_type': 'jwt'},
      }
  }
  
  LOCAL_APPS = [
      "navoica_enroll.users.apps.UsersConfig",
      # Your stuff: custom apps go here
  ]
  # https://docs.djangoproject.com/en/dev/ref/settings/#installed-apps
  INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS
  
  # MIGRATIONS
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#migration-modules
  MIGRATION_MODULES = {"sites": "navoica_enroll.contrib.sites.migrations"}
  
  # AUTHENTICATION
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#authentication-backends
  AUTHENTICATION_BACKENDS = [
      "django.contrib.auth.backends.ModelBackend",
      "allauth.account.auth_backends.AuthenticationBackend",
  ]
  # https://docs.djangoproject.com/en/dev/ref/settings/#auth-user-model
  AUTH_USER_MODEL = "users.User"
  # https://docs.djangoproject.com/en/dev/ref/settings/#login-redirect-url
  LOGIN_REDIRECT_URL = "users:redirect"
  # https://docs.djangoproject.com/en/dev/ref/settings/#login-url
  LOGIN_URL = "account_login"
  
  # PASSWORDS
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#password-hashers
  PASSWORD_HASHERS = [
      # https://docs.djangoproject.com/en/dev/topics/auth/passwords/#using-argon2-with-django
      "django.contrib.auth.hashers.Argon2PasswordHasher",
      "django.contrib.auth.hashers.PBKDF2PasswordHasher",
      "django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher",
      "django.contrib.auth.hashers.BCryptSHA256PasswordHasher",
  ]
  # https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators
  AUTH_PASSWORD_VALIDATORS = [
      {
          "NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator"
      },
      {"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator"},
      {"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator"},
      {
          "NAME": "django.contrib.auth.password_validation.NumericPasswordValidator"},
  ]
  
  # MIDDLEWARE
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#middleware
  MIDDLEWARE = [
      "django.middleware.security.SecurityMiddleware",
      "whitenoise.middleware.WhiteNoiseMiddleware",
      "django.contrib.sessions.middleware.SessionMiddleware",
      "django.middleware.locale.LocaleMiddleware",
      "django.middleware.common.CommonMiddleware",
      "django.middleware.csrf.CsrfViewMiddleware",
      "django.contrib.auth.middleware.AuthenticationMiddleware",
      "django.contrib.messages.middleware.MessageMiddleware",
      "django.middleware.common.BrokenLinkEmailsMiddleware",
      "django.middleware.clickjacking.XFrameOptionsMiddleware",
  ]
  
  # STATIC
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#static-root
  STATIC_ROOT = str(ROOT_DIR("staticfiles"))
  # https://docs.djangoproject.com/en/dev/ref/settings/#static-url
  STATIC_URL = "/static/"
  # https://docs.djangoproject.com/en/dev/ref/contrib/staticfiles/#std:setting-STATICFILES_DIRS
  STATICFILES_DIRS = [str(APPS_DIR.path("static")),
                      str(ROOT_DIR("external_static"))]
  # https://docs.djangoproject.com/en/dev/ref/contrib/staticfiles/#staticfiles-finders
  STATICFILES_FINDERS = [
      "django.contrib.staticfiles.finders.FileSystemFinder",
      "django.contrib.staticfiles.finders.AppDirectoriesFinder",
  ]
  
  # MEDIA
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#media-root
  MEDIA_ROOT = str(APPS_DIR("media"))
  # https://docs.djangoproject.com/en/dev/ref/settings/#media-url
  MEDIA_URL = "/media/"
  
  # TEMPLATES
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#templates
  TEMPLATES = [
      {
          # https://docs.djangoproject.com/en/dev/ref/settings/#std:setting-TEMPLATES-BACKEND
          "BACKEND": "django.template.backends.django.DjangoTemplates",
          # https://docs.djangoproject.com/en/dev/ref/settings/#template-dirs
          "DIRS": [str(APPS_DIR.path("templates"))],
          "OPTIONS": {
              # https://docs.djangoproject.com/en/dev/ref/settings/#template-loaders
              # https://docs.djangoproject.com/en/dev/ref/templates/api/#loader-types
              "loaders": [
                  "django.template.loaders.filesystem.Loader",
                  "django.template.loaders.app_directories.Loader",
              ],
              # https://docs.djangoproject.com/en/dev/ref/settings/#template-context-processors
              "context_processors": [
                  "django.template.context_processors.debug",
                  "django.template.context_processors.request",
                  "django.contrib.auth.context_processors.auth",
                  "django.template.context_processors.i18n",
                  "django.template.context_processors.media",
                  "django.template.context_processors.static",
                  "django.template.context_processors.tz",
                  "django.contrib.messages.context_processors.messages",
                  "navoica_enroll.utils.context_processors.settings_context",
              ],
          },
      }
  ]
  
  # https://docs.djangoproject.com/en/dev/ref/settings/#form-renderer
  FORM_RENDERER = "django.forms.renderers.TemplatesSetting"
  
  # http://django-crispy-forms.readthedocs.io/en/latest/install.html#template-packs
  CRISPY_TEMPLATE_PACK = "bootstrap4"
  
  # FIXTURES
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#fixture-dirs
  FIXTURE_DIRS = (str(APPS_DIR.path("fixtures")),)
  
  # SECURITY
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#session-cookie-httponly
  SESSION_COOKIE_HTTPONLY = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#csrf-cookie-httponly
  CSRF_COOKIE_HTTPONLY = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#secure-browser-xss-filter
  SECURE_BROWSER_XSS_FILTER = True
  # https://docs.djangoproject.com/en/dev/ref/settings/#x-frame-options
  X_FRAME_OPTIONS = "DENY"
  
  # EMAIL
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#email-backend
  EMAIL_BACKEND = env(
      "DJANGO_EMAIL_BACKEND",
      default="django.core.mail.backends.smtp.EmailBackend"
  )
  # https://docs.djangoproject.com/en/2.2/ref/settings/#email-timeout
  EMAIL_TIMEOUT = 5
  
  # ADMIN
  # ------------------------------------------------------------------------------
  # Django Admin URL.
  ADMIN_URL = "admin/"
  # https://docs.djangoproject.com/en/dev/ref/settings/#admins
  ADMINS = [("""Krzysztof Hoffmann""", "krzysztof.hoffmann@opi.org.pl")]
  # https://docs.djangoproject.com/en/dev/ref/settings/#managers
  MANAGERS = ADMINS
  
  # LOGGING
  # ------------------------------------------------------------------------------
  # https://docs.djangoproject.com/en/dev/ref/settings/#logging
  # See https://docs.djangoproject.com/en/dev/topics/logging for
  # more details on how to customize your logging configuration.
  LOGGING = {
      "version": 1,
      "disable_existing_loggers": False,
      "formatters": {
          "verbose": {
              "format": "%(levelname)s %(asctime)s %(module)s "
                        "%(process)d %(thread)d %(message)s"
          }
      },
      "handlers": {
          "console": {
              "level": "DEBUG",
              "class": "logging.StreamHandler",
              "formatter": "verbose",
          }
      },
      "root": {"level": "INFO", "handlers": ["console"]},
  }
  
  # django-allauth
  # ------------------------------------------------------------------------------
  # https://django-allauth.readthedocs.io/en/latest/configuration.html
  ACCOUNT_AUTHENTICATION_METHOD = "email"
  # https://django-allauth.readthedocs.io/en/latest/configuration.html
  ACCOUNT_EMAIL_REQUIRED = True
  # https://django-allauth.readthedocs.io/en/latest/configuration.html
  ACCOUNT_EMAIL_VERIFICATION = "none"
  # https://django-allauth.readthedocs.io/en/latest/configuration.html
  ACCOUNT_ADAPTER = "navoica_enroll.users.adapters.AccountAdapter"
  # https://django-allauth.readthedocs.io/en/latest/configuration.html
  SOCIALACCOUNT_ADAPTER = "navoica_enroll.users.adapters.SocialAccountAdapter"
  # django-compressor
  # ------------------------------------------------------------------------------
  # https://django-compressor.readthedocs.io/en/latest/quickstart/#installation
  INSTALLED_APPS += ["compressor"]
  STATICFILES_FINDERS += ["compressor.finders.CompressorFinder"]
  # django-reset-framework
  # -------------------------------------------------------------------------------
  # django-rest-framework - https://www.django-rest-framework.org/api-guide/settings/
  REST_FRAMEWORK = {
      "DEFAULT_AUTHENTICATION_CLASSES": (
          "rest_framework.authentication.SessionAuthentication",
          "rest_framework.authentication.TokenAuthentication",
      ),
      "DEFAULT_PERMISSION_CLASSES": (
          "rest_framework.permissions.IsAuthenticated",),
  }
  # ------------------------------------------------------------------------------
  COURSE_KEY_PATTERN = r'(?P<course_key_string>[^/+]+(/|\+)[^/+]+(/|\+)[^/?]+)'
  COURSE_ID_PATTERN = COURSE_KEY_PATTERN.replace('course_key_string', 'course_id')
  COURSE_KEY_REGEX = COURSE_KEY_PATTERN.replace('P<course_key_string>', ':')
  
  STATEMENT1_PDF = env.str("STATEMENT1_PDF")
  STATEMENT2_PDF = env.str("STATEMENT2_PDF")
  STATEMENT1_EN_PDF = env.str("STATEMENT1_EN_PDF")
  STATEMENT2_EN_PDF = env.str("STATEMENT2_EN_PDF")
  
  try:
      PLATFORM_VERSION = subprocess.check_output(
          ["git -C %s describe --tags" % ROOT_DIR], shell=True).decode('UTF-8')
  except subprocess.CalledProcessError as e:
      PLATFORM_VERSION = "HEAD"
  