Eternal weather

data/core/game_balance.json

@@ -334,5 +334,12 @@
     "info": "Determines frequency (in minutes) of displaying music description in sidebar when listening to MP3-players and the like.",
     "stype": "int",
     "value": 5
+  },
+  {
+    "type": "EXTERNAL_OPTION",
+    "name": "ETERNAL_WEATHER",
+    "info": "Sets eternal weather.  Possible values are 'normal', 'clear', 'cloudy', 'light_drizzle', 'drizzle', 'rain', 'rainstorm', 'thunder', 'lightning', 'flurries', 'snowing', 'snowstorm', 'early_portal_storm', 'portal_storm'.  'normal' clears all eternal weather overrides and sets normal weather pattern.  Requires restart of the game after changing value to take effect.",
+    "stype": "string_input",
+    "value": "normal"
   }
 ]

src/do_turn.cpp

@@ -594,7 +594,7 @@ bool do_turn()
         return turn_handler::cleanup_at_end();
     }
     // Actual stuff
-    if( g-> new_game ) {
+    if( g->new_game ) {
         g->new_game = false;
     } else {
         g->gamemode->per_turn();
@@ -604,6 +604,15 @@ bool do_turn()
     play_music( music::get_music_id_string() );
 
     weather_manager &weather = get_weather();
+    if( get_option<std::string>( "ETERNAL_WEATHER" ) != "normal" ) {
+        weather.weather_override = static_cast<weather_type_id>
+                                   ( get_option<std::string>( "ETERNAL_WEATHER" ) );
+        weather.set_nextweather( calendar::turn );
+    } else {
+        weather.weather_override = WEATHER_NULL;
+        weather.set_nextweather( calendar::turn );
+    }
+
     // starting a new turn, clear out temperature cache
     weather.temperature_cache.clear();
 

src/main_menu.cpp

@@ -831,6 +831,13 @@ bool main_menu::opening_screen()
     }
     if( start && !load_game && get_scenario() ) {
         add_msg( get_scenario()->description( player_character.male ) );
+
+        if( get_option<std::string>( "ETERNAL_WEATHER" ) != "normal" ) {
+            if( player_character.posz() >= 0 ) {
+                add_msg( _( "You feel as if this %1$s will last forever…" ),
+                         get_options().get_option( "ETERNAL_WEATHER" ).getValueName() );
+            }
+        }
     }
     return true;
 }