[welcome] Set some localeConf values from the welcome page

CHANGES

@@ -39,6 +39,11 @@ on functionality, but do touch each and every source file:
  - *keyboardq* and *localeq* improvements. (Thanks to Anke)
  - *users* module did not set up autologin properly. This is yet another
    regression left over from 3.2.28. (Reported by Phil and pcrepix, #1498)
+ - *welcome* module now sets the *LANG* key in the locale configuration
+   (which is shared with the *locale* module and consumed by the
+   *localecfg* module). This makes it feasible to drop the *locale*
+   module and still set the installed system's language to the language
+   selected in Calamares. (Reported by FerenOS)
 
 
 # 3.2.29 (2020-08-20) #

src/modules/welcome/Config.cpp

@@ -10,8 +10,11 @@
 #include "Config.h"
 
 #include "Branding.h"
+#include "GlobalStorage.h"
+#include "JobQueue.h"
 #include "Settings.h"
 #include "geoip/Handler.h"
+#include "locale/Global.h"
 #include "locale/Lookup.h"
 #include "modulesystem/ModuleManager.h"
 #include "utils/Logger.h"
@@ -186,7 +189,12 @@ Config::setLocaleIndex( int index )
 
     QLocale::setDefault( selectedLocale );
     CalamaresUtils::installTranslator( selectedLocale, Calamares::Branding::instance()->translationsDirectory() );
-
+    if ( Calamares::JobQueue::instance() && Calamares::JobQueue::instance()->globalStorage() )
+    {
+        CalamaresUtils::Locale::insertGS( *Calamares::JobQueue::instance()->globalStorage(),
+                                          QStringLiteral( "LANG" ),
+                                          CalamaresUtils::translatorLocaleName() );
+    }
     emit localeIndexChanged( m_localeIndex );
 }