Add player pilot invulnerability option.

https://github.com/dcs-liberation/dcs_liberation/issues/276

game/event/event.py

@@ -120,10 +120,13 @@ class Event:
             self.game.red_ato, debriefing.air_losses, for_player=False
         )
 
-    @staticmethod
-    def commit_air_losses(debriefing: Debriefing) -> None:
+    def commit_air_losses(self, debriefing: Debriefing) -> None:
         for loss in debriefing.air_losses.losses:
-            loss.pilot.alive = False
+            if (
+                not loss.pilot.player
+                or not self.game.settings.invulnerable_player_pilots
+            ):
+                loss.pilot.alive = False
             aircraft = loss.flight.unit_type
             cp = loss.flight.departure
             available = cp.base.total_units_of_type(aircraft)

game/settings.py

@@ -36,6 +36,7 @@ class Settings:
     restrict_weapons_by_date: bool = False
     disable_legacy_aewc: bool = False
     generate_dark_kneeboard: bool = False
+    invulnerable_player_pilots: bool = True
 
     # Performance oriented
     perf_red_alert_state: bool = True

qt_ui/windows/settings/QSettingsWindow.py

@@ -92,7 +92,7 @@ class StartTypeComboBox(QComboBox):
 
 class QSettingsWindow(QDialog):
     def __init__(self, game: Game):
-        super(QSettingsWindow, self).__init__()
+        super().__init__()
 
         self.game = game
         self.pluginsPage = None
@@ -285,6 +285,23 @@ class QSettingsWindow(QDialog):
         self.ext_views.setChecked(self.game.settings.external_views_allowed)
         self.ext_views.toggled.connect(self.applySettings)
 
+        def set_invulnerable_player_pilots(checked: bool) -> None:
+            self.game.settings.invulnerable_player_pilots = checked
+
+        invulnerable_player_pilots_label = QLabel(
+            "Player pilots cannot be killed<br />"
+            "<strong>Aircraft are vulnerable, but the player's pilot will be<br />"
+            "returned to the squadron at the end of the mission</strong>"
+        )
+
+        invulnerable_player_pilots_checkbox = QCheckBox()
+        invulnerable_player_pilots_checkbox.setChecked(
+            self.game.settings.invulnerable_player_pilots
+        )
+        invulnerable_player_pilots_checkbox.toggled.connect(
+            set_invulnerable_player_pilots
+        )
+
         self.aiDifficultyLayout.addWidget(QLabel("Player coalition skill"), 0, 0)
         self.aiDifficultyLayout.addWidget(
             self.playerCoalitionSkill, 0, 1, Qt.AlignRight
@@ -295,6 +312,10 @@ class QSettingsWindow(QDialog):
         self.aiDifficultyLayout.addWidget(self.enemyAASkill, 2, 1, Qt.AlignRight)
         self.aiDifficultyLayout.addLayout(self.player_income, 3, 0)
         self.aiDifficultyLayout.addLayout(self.enemy_income, 4, 0)
+        self.aiDifficultyLayout.addWidget(invulnerable_player_pilots_label, 5, 0)
+        self.aiDifficultyLayout.addWidget(
+            invulnerable_player_pilots_checkbox, 5, 1, Qt.AlignRight
+        )
         self.aiDifficultySettings.setLayout(self.aiDifficultyLayout)
         self.difficultyLayout.addWidget(self.aiDifficultySettings)