- pre-load MLObserver class due to startup error in ue_site.py

Plugins/MaRLEnE/MaRLEnE.uplugin

@@ -17,7 +17,7 @@
 		{
 			"Name": "MaRLEnE",
 			"Type": "Runtime",
-			"LoadingPhase": "PostDefault"
+			"LoadingPhase": "PreDefault"
 		}
 	]
 }

Plugins/MaRLEnE/Scripts/kill_all.py

@@ -0,0 +1,20 @@
+"""
+ -------------------------------------------------------------------------
+ MaRLEnE - Machine- and Reinforcement Learning ExtensioN for (game) Engines
+ Plugins/MaRLEnE/Scripts/marlene_server.py
+
+ The server running inside UE4 (UnrealEnginePython) and listening on a
+ port for incoming ML connections.
+ Handles incoming commands from the ML environment such as stepping
+ through the game, setting properties, resetting the game, etc..
+
+ created: 2017/10/26 in PyCharm
+ (c) 2017-2018 Roberto DeLoris (20tab) & Sven Mika (ducandu)
+ -------------------------------------------------------------------------
+"""
+
+import asyncio
+
+# cleanup previous tasks
+for task in asyncio.Task.all_tasks():
+    task.cancel()

Plugins/MaRLEnE/Scripts/marlene_server.py

@@ -269,7 +269,7 @@ async def new_client_connected(reader, writer):
         orig_len = int(data)
         received_len = 0
         while True:
-            data = reader.read(min(orig_len - received_len, 8192))
+            data = await reader.read(min(orig_len - received_len, 8192))
             if not data:
                 send_message({"status": "error",
                               "message": "No data of len {} received by socket.recv in call to method `recv`!".
@@ -293,7 +293,7 @@ async def new_client_connected(reader, writer):
                 send_message(response, writer)
             # async calls -> do nothing here (async will handle it)
 
-    ue.log('Client {0} disconnected'.format(name))
+    ue.log("Client {0} disconnected".format(name))
 
 
 # this spawns the server

Plugins/MaRLEnE/Scripts/ue_site.py

@@ -6,5 +6,6 @@
 # load the GeneralProjjectSettings class
 # (could be that classes are not loaded yet when ue_site (this script) is executed)
 ue.load_class("/Script/EngineSettings.GeneralProjectSettings")
+ue.load_class("/Script/MaRLEnE.MLObserver")
 
 import marlene_server

docker/ue4_exec_game/Dockerfile

@@ -1,6 +1,6 @@
 # to build a final game image that only contains the cooked game executable
 
-ARG base_img=ducandu/ue4_alien_invaders
+ARG base_img=ducandu/ue4_alien_invaders:build
 
 # the base image to copy from
 FROM $base_img AS game_img

docker/ue4_game/Dockerfile

@@ -3,7 +3,7 @@
 
 # provide build-args:
 # game=[the project's name, e.g. AlienInvaders (default)]
-# base_img=[the base image to use: `ue4` for initial build, or `ue4_alien_invaders` for an already built game]
+# base_img=[the base image to use: `ducandu/ue4` for initial build, or `ducandu/ue4_[some_game]:build` for a previously built game]
 
 ARG base_img=ducandu/ue4
 

docker/ue4_game/build_game_incr.sh

@@ -1,12 +1,16 @@
 #!/bin/sh
 
+echo "incremental build"
 echo "GAME=$GAME"
+echo "UE4PYTHON_TAG=$UE4PYTHON_TAG"
 
 cd /home/ue4/marlene
-git pull
+git pull origin master
 cd ../UnrealEnginePython
+git checkout tags/${UE4PYTHON_TAG}
 git pull
 
+
 # copy (update; only newer files) the example game and the two plugins into UnrealEngine
 cd
 cp -r -u marlene/examples/UE4Games/${GAME} UnrealEngine/.

docker/ue4_game/build_game_init.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
 
+echo "init build (from scratch)"
 echo "GAME=$GAME"
 echo "UE4PYTHON_TAG=$UE4PYTHON_TAG"