Refactor extract default language to constant

securedrop_client/app.py

@@ -38,13 +38,14 @@
 from securedrop_client.logic import Controller
 from securedrop_client.utils import safe_mkdir
 
+LanguageCode = NewType("LanguageCode", str)
+
 SDC_NAME = "SecureDrop Client"
 DEFAULT_SDC_HOME = "~/.securedrop_client"
+DEFAULT_LANGUAGE = LanguageCode("en")
 ENCODING = "utf-8"
 LOGLEVEL = os.environ.get("LOGLEVEL", "info").upper()
 
-LanguageCode = NewType("LanguageCode", str)
-
 
 def init(sdc_home: str) -> None:
     safe_mkdir(sdc_home)
@@ -70,11 +71,11 @@ def configure_locale_and_language() -> LanguageCode:
         current_locale, encoding = locale.getdefaultlocale()
         # Get the language code.
         if current_locale is None:
-            code = LanguageCode("en")
+            code = DEFAULT_LANGUAGE
         else:
             code = LanguageCode(current_locale[:2])
     except ValueError:  # pragma: no cover
-        code = LanguageCode("en")  # pragma: no cover
+        code = DEFAULT_LANGUAGE  # pragma: no cover
     gettext.bindtextdomain("messages", localedir=localedir)
     gettext.textdomain("messages")
     return code