fix: dont log anything if nothing logged by player (#3)

Author: dipeshkaphle

cpp/main.cpp

@@ -40,9 +40,11 @@ void output(State &state, Game &game) {
 
   // Player logs are logged to cerr, so that driver will collect it
   game.logr().flush();
-  std::cerr << "TURN " << state.get_turn_no() << '\n';
-  std::cerr << game.logr().view() << '\n';
-  std::cerr << "ENDLOG" << std::endl;
+  if (!game.logr().view().empty()) {
+    std::cerr << "TURN " << state.get_turn_no() << '\n';
+    std::cerr << game.logr().view() << '\n';
+    std::cerr << "ENDLOG" << std::endl;
+  }
 
   // Game details logged
   const auto &spawn_positions = game.get_spawn_positions();

java/Main.java

@@ -46,9 +46,11 @@ private static void output(State state, Game game) {
 
         String log = game.getLog();
 
-        System.err.println("TURN " + state.getTurnNo());
-        System.err.println(log);
-        System.err.println("ENDLOG");
+        if (!log.isEmpty()) {
+            System.err.println("TURN " + state.getTurnNo());
+            System.err.println(log);
+            System.err.println("ENDLOG");
+        }
 
         List<SpawnDetail> spawnPositions = game.getSpawnPositions();
 

python/main.py

@@ -4,7 +4,7 @@
 
 def output(state: State, game: Game):
     log_line = game.get_log()
-    if log_line:
+    if log_line and len(log_line)!=0:
         sys.stderr.write(f"TURN {state.turn_no}\n")
         sys.stderr.write(log_line)
         sys.stderr.write(f"ENDLOG\n")