Change squadrons to operate out of a single base.

https://github.com/dcs-liberation/dcs_liberation/issues/1145

Currently this is fixed at the start of the campaign. The squadron
locations are defined by the campaign file.

Follow up work:

* Track aircraft ownership per-squadron rather than per-airbase.
* UI for relocating squadrons.
* Ferry missions for squadrons that are relocating.
* Auto-relocation (probably only for retreat handling).

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1138

gen/__init__.py

@@ -1,13 +0,0 @@
-from .aircraft import *
-from .armor import *
-from .airsupportgen import *
-from .conflictgen import *
-from .visualgen import *
-from .triggergen import *
-from .environmentgen import *
-from .groundobjectsgen import *
-from .briefinggen import *
-from .forcedoptionsgen import *
-from .kneeboard import *
-
-from . import naming

gen/aircraft.py

@@ -69,7 +69,6 @@ from game.data.weapons import Pylon, WeaponType as WeaponTypeEnum
 from game.dcs.aircrafttype import AircraftType
 from game.factions.faction import Faction
 from game.settings import Settings
-from game.squadrons import Pilot
 from game.theater.controlpoint import (
     Airfield,
     ControlPoint,
@@ -109,6 +108,7 @@ from .naming import namegen
 
 if TYPE_CHECKING:
     from game import Game
+    from game.squadrons import Pilot
 
 WARM_START_HELI_ALT = meters(500)
 WARM_START_ALTITUDE = meters(3000)

gen/airsupport.py

@@ -5,7 +5,8 @@ from datetime import timedelta
 from typing import Optional, TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from gen import RadioFrequency, TacanChannel
+    from gen.radios import RadioFrequency
+    from gen.tacan import TacanChannel
 
 
 @dataclass

gen/airsupportgen.py

@@ -16,8 +16,7 @@ from dcs.task import (
 from dcs.unittype import UnitType
 
 from game.utils import Heading
-from . import AirSupport
-from .airsupport import TankerInfo, AwacsInfo
+from .airsupport import AirSupport, TankerInfo, AwacsInfo
 from .callsigns import callsign_for_support_unit
 from .conflictgen import Conflict
 from .flights.ai_flight_planner_db import AEWC_CAPABLE

gen/flights/flight.py

@@ -2,20 +2,19 @@ from __future__ import annotations
 
 from datetime import timedelta
 from enum import Enum
-from typing import List, Optional, TYPE_CHECKING, Union, Sequence, Any
+from typing import List, Optional, TYPE_CHECKING, Union, Sequence
 
 from dcs.mapping import Point
 from dcs.point import MovingPoint, PointAction
 from dcs.unit import Unit
 
 from game.dcs.aircrafttype import AircraftType
-from game.savecompat import has_save_compat_for
-from game.squadrons import Pilot, Squadron
 from game.theater.controlpoint import ControlPoint, MissionTarget
 from game.utils import Distance, meters
 from gen.flights.loadouts import Loadout
 
 if TYPE_CHECKING:
+    from game.squadrons import Pilot, Squadron
     from game.transfers import TransferOrder
     from gen.ato import Package
     from gen.flights.flightplan import FlightPlan
@@ -50,6 +49,8 @@ class FlightType(Enum):
       strike-like missions will need more specialized control.
     * ai_flight_planner.py: Use the new mission type in propose_missions so the AI will
       plan the new mission type.
+    * FlightType.is_air_to_air and FlightType.is_air_to_ground: If the new mission type
+      fits either of these categories, update those methods accordingly.
     """
 
     TARCAP = "TARCAP"
@@ -80,6 +81,30 @@ class FlightType(Enum):
                 return entry
         raise KeyError(f"No FlightType with name {name}")
 
+    @property
+    def is_air_to_air(self) -> bool:
+        return self in {
+            FlightType.TARCAP,
+            FlightType.BARCAP,
+            FlightType.INTERCEPTION,
+            FlightType.ESCORT,
+            FlightType.SWEEP,
+        }
+
+    @property
+    def is_air_to_ground(self) -> bool:
+        return self in {
+            FlightType.CAS,
+            FlightType.STRIKE,
+            FlightType.ANTISHIP,
+            FlightType.SEAD,
+            FlightType.DEAD,
+            FlightType.BAI,
+            FlightType.OCA_RUNWAY,
+            FlightType.OCA_AIRCRAFT,
+            FlightType.SEAD_ESCORT,
+        }
+
 
 class FlightWaypointType(Enum):
     """Enumeration of waypoint types.
@@ -169,12 +194,6 @@ class FlightWaypoint:
         self.tot: Optional[timedelta] = None
         self.departure_time: Optional[timedelta] = None
 
-    @has_save_compat_for(5)
-    def __setstate__(self, state: dict[str, Any]) -> None:
-        if "min_fuel" not in state:
-            state["min_fuel"] = None
-        self.__dict__.update(state)
-
     @property
     def position(self) -> Point:
         return Point(self.x, self.y)

gen/naming.py

@@ -1,12 +1,16 @@
+from __future__ import annotations
+
 import random
 import time
-from typing import List, Any
+from typing import List, Any, TYPE_CHECKING
 
 from dcs.country import Country
 
 from game.dcs.aircrafttype import AircraftType
 from game.dcs.unittype import UnitType
-from gen.flights.flight import Flight
+
+if TYPE_CHECKING:
+    from gen.flights.flight import Flight
 
 ALPHA_MILITARY = [
     "Alpha",