extracted lua ai code into external .lua files

data/ai/dev/lua_ai.cfg

@@ -1,25 +1,15 @@
 #textdomain wesnoth
 [ai]
-    id=ai_lua
-    description=Lua Test AI version 3
+    id=ai_lua_simple
+    description=Lua Simple AI
     version=10710
     [engine]
        name="lua"
-       code= << local side = ... return {
-          side = side,
-          move_full = function(FROM,TO) wesnoth.ai_execute_move(side,FROM.x,FROM.y,TO.x,TO.y,1) end,
-          move = function(FROM,TO) wesnoth.ai_execute_move(side,FROM.x,FROM.y,TO.x,TO.y,0) end,
-          attack_simple = function(ATT,DEF) wesnoth.ai_execute_attack(side,ATT.x,ATT.y,DEF.x,DEF.y,-1,0.5) end,
-          recruit = function(UNIT_NAME,LOC) wesnoth.ai_execute_recruit(side,UNIT_NAME,LOC.x,LOC.y) end,
-          recall = function(UNIT_ID,LOC) wesnoth.ai_execute_recall(side,UNIT_ID,LOC.x,LOC.y) end,
-          stop = function(LOC,MOVES,ATTACKS) wesnoth.ai_execute_stopunit(side,LOC.x,LOC.y,MOVES,ATTACKS) end
-          }
->>
+       code="side = ... local ai = wesnoth.dofile('ai/lua/simple_ai.lua') return ai"
     [/engine]
     [stage]
         engine="lua"
-        code= << local ai = ... ai.move_full({x=15, y=2},{x=11, y=4})
->>
+        code= "(...):play_turn()"
     [/stage]
 [/ai]
 

data/ai/lua/ai.lua

@@ -0,0 +1,33 @@
+local ai = { side = side }
+
+--! do a full move from FROM to TO. Unit's movement points are set to 0 after a move
+function ai:move_full(FROM,TO)
+	 wesnoth.ai_execute_move(self.side,FROM.x,FROM.y,TO.x,TO.y,1)
+end
+
+--! do a partial move from FROM to TO.
+function ai:move(FROM,TO)
+	 wesnoth.ai_execute_move(self.side,FROM.x,FROM.y,TO.x,TO.y,0)
+end
+
+--! do a simple attack using aggression 0.5 and choosing best weapon
+function ai:attack_simple(ATT,DEF)
+    	 wesnoth.ai_execute_attack(self.side,ATT.x,ATT.y,DEF.x,DEF.y,-1,0.5)
+end
+
+--! recruit a UNIT_NAME on LOC
+function ai:recruit(UNIT_NAME,LOC)
+   	 wesnoth.ai_execute_recruit(self.side,UNIT_NAME,LOC.x,LOC.y)
+end
+
+--! recall a UNIT_ID at LOC
+function ai:recall(UNIT_ID,LOC)
+       	 wesnoth.ai_execute_recall(self.side,UNIT_ID,LOC.x,LOC.y)
+end
+
+--! stop a unit at LOC - remove MOVES and/or remove ATTACK
+function ai:stop(LOC,MOVES,ATTACKS)
+	 wesnoth.ai_execute_stopunit(self.side,LOC.x,LOC.y,MOVES,ATTACKS)
+end
+
+return ai

data/ai/lua/simple_ai.lua

@@ -0,0 +1,9 @@
+local ai = wesnoth.dofile('ai/lua/ai.lua')
+
+function ai:play_turn()
+        --! only a few thousands lines have to be added here to complete the ai
+	my_leader = wesnoth.get_units( {canrecruit="yes", side=self.side})[1]
+   	self:move_full(my_leader,{x=11, y=4})
+end
+
+return ai