Setup QgsSettings in the correct order

We don't have the location of QGIS.ini until we know the profile
so we can't use QgsSettings to get the global settings before this.

src/app/main.cpp

@@ -798,16 +798,47 @@ int main( int argc, char *argv[] )
   QCoreApplication::setAttribute( Qt::AA_DisableWindowContextHelpButton, true );
 #endif
 
-  QgsSettings settings;
+  // SetUp the QgsSettings Global Settings:
+  // - use the path specified with --globalsettingsfile path,
+  // - use the environment if not found
+  // - use a default location as a fallback
+  if ( globalsettingsfile.isEmpty() )
+  {
+    globalsettingsfile = getenv( "QGIS_GLOBAL_SETTINGS_FILE" );
+  }
+
+  if ( globalsettingsfile.isEmpty() )
+  {
+    QString default_globalsettingsfile = QgsApplication::pkgDataPath() + "/qgis_global_settings.ini";
+    if ( QFile::exists( default_globalsettingsfile ) )
+    {
+      globalsettingsfile = default_globalsettingsfile;
+    }
+  }
+
+  if ( !globalsettingsfile.isEmpty() )
+  {
+    if ( ! QgsSettings::setGlobalSettingsPath( globalsettingsfile ) )
+    {
+      QgsMessageLog::logMessage( QStringLiteral( "Invalid globalsettingsfile path: %1" ).arg( globalsettingsfile ), QStringLiteral( "QGIS" ) );
+    }
+    else
+    {
+      QgsMessageLog::logMessage( QStringLiteral( "Successfully loaded globalsettingsfile path: %1" ).arg( globalsettingsfile ), QStringLiteral( "QGIS" ) );
+    }
+  }
+
+  QSettings *globalSettings = new QSettings( globalsettingsfile, QSettings::IniFormat );
+  globalSettings->setIniCodec( "UTF-8" );
   if ( configLocalStorageLocation.isEmpty() )
   {
     if ( getenv( "QGIS_CUSTOM_CONFIG_PATH" ) )
     {
       configLocalStorageLocation = getenv( "QGIS_CUSTOM_CONFIG_PATH" );
     }
-    else if ( settings.contains( QStringLiteral( "profilesPath" ), QgsSettings::Core ) )
+    else if ( globalSettings->contains( QStringLiteral( "core/profilesPath" ) ) )
     {
-      configLocalStorageLocation = settings.value( QStringLiteral( "profilesPath" ), "", QgsSettings::Core ).toString();
+      configLocalStorageLocation = globalSettings->value( QStringLiteral( "core/profilesPath" ), "" ).toString();
       QgsDebugMsg( QString( "Loading profiles path from global config at %1" ).arg( configLocalStorageLocation ) );
     }
 
@@ -817,6 +848,7 @@ int main( int argc, char *argv[] )
       configLocalStorageLocation = QStandardPaths::standardLocations( QStandardPaths::AppDataLocation ).value( 0 );
     }
   }
+  delete globalSettings;
 
   QString rootProfileFolder = QgsUserProfileManager::resolveProfilesFolder( configLocalStorageLocation );
   QgsUserProfileManager manager( rootProfileFolder );
@@ -825,49 +857,26 @@ int main( int argc, char *argv[] )
   profileName = profile->name();
   delete profile;
 
+  // We can't use QgsSettings until this point because the format and
+  // folder isn't set until profile is fetch.
+  // Should be cleaned up in future to make this cleaner.
+  QgsSettings settings;
+
   QgsDebugMsg( "User profile details:" );
   QgsDebugMsg( QString( "\t - %1" ).arg( profileName ) );
   QgsDebugMsg( QString( "\t - %1" ).arg( profileFolder ) );
   QgsDebugMsg( QString( "\t - %1" ).arg( rootProfileFolder ) );
 
   QgsApplication myApp( argc, argv, myUseGuiFlag, profileFolder );
 
-  // SetUp the QgsSettings Global Settings:
-  // - use the path specified with --globalsettingsfile path,
-  // - use the environment if not found
-  // - use a default location as a fallback
-  if ( globalsettingsfile.isEmpty() )
-  {
-    globalsettingsfile = getenv( "QGIS_GLOBAL_SETTINGS_FILE" );
-  }
-  if ( globalsettingsfile.isEmpty() )
-  {
-    QString default_globalsettingsfile = QgsApplication::pkgDataPath() + "/qgis_global_settings.ini";
-    if ( QFile::exists( default_globalsettingsfile ) )
-    {
-      globalsettingsfile = default_globalsettingsfile;
-    }
-  }
-  if ( !globalsettingsfile.isEmpty() )
-  {
-    if ( ! QgsSettings::setGlobalSettingsPath( globalsettingsfile ) )
-    {
-      QgsMessageLog::logMessage( QStringLiteral( "Invalid globalsettingsfile path: %1" ).arg( globalsettingsfile ), QStringLiteral( "QGIS" ) );
-    }
-    else
-    {
-      QgsMessageLog::logMessage( QStringLiteral( "Successfully loaded globalsettingsfile path: %1" ).arg( globalsettingsfile ), QStringLiteral( "QGIS" ) );
-    }
-  }
-
   // Settings migration is only supported on the default profile for now.
   if ( profileName == "default" )
   {
     // Note: this flag is ka version number so that we can reset it once we change the version.
     // Note2: Is this a good idea can we do it better.
 
     int firstRunVersion = settings.value( QStringLiteral( "migration/firstRunVersionFlag" ), 0 ).toInt();
-    bool showWelcome = ( firstRunVersion == 0 || Qgis::QGIS_VERSION_INT > firstRunVersion );
+    bool showWelcome = ( firstRunVersion == 0  || Qgis::QGIS_VERSION_INT > firstRunVersion );
 
     std::unique_ptr< QgsVersionMigration > migration( QgsVersionMigration::canMigrate( 20000, Qgis::QGIS_VERSION_INT ) );
     if ( migration && ( mySettingsMigrationForce || migration->requiresMigration() ) )