Support running the default homemade engines without the need to prov…

…ide a `homemade.py` file (#951)

* Homemade engines in docker

* Delete lib/extra_game_handlers_wrapper.py

* Remove warning

* Update Dockerfile

docker/Dockerfile

@@ -13,8 +13,5 @@ COPY . .
 RUN python3 -m pip install --no-cache-dir -r requirements.txt
 
 ARG CONF_FOLDER=$LICHESS_DIR/config
-RUN ln -s $CONF_FOLDER/config.yml config.yml &&\
-    ln -sf $CONF_FOLDER/homemade.py homemade.py &&\
-    ln -sf $CONF_FOLDER/extra_game_handlers.py extra_game_handlers.py
 
-CMD python3 lichess-bot.py ${OPTIONS} --disable_auto_logging
+CMD docker/copy_files.sh && python3 lichess-bot.py ${OPTIONS} --disable_auto_logging

docker/Dockerfile.dockerignore

@@ -1,4 +1,3 @@
-docker/
 docs/
 wiki/
 .git*

docker/copy_files.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+ln -s /lichess-bot/config/config.yml config.yml
+
+if [ -f /lichess-bot/config/homemade.py ]; then
+    ln -sf /lichess-bot/config/homemade.py homemade.py
+fi
+
+if [ -f /lichess-bot/config/extra_game_handlers.py ]; then
+    ln -sf /lichess-bot/config/extra_game_handlers.py extra_game_handlers.py
+fi

lib/engine_wrapper.py

@@ -18,7 +18,7 @@
 from lib import config, model, lichess
 from lib.config import Configuration
 from lib.timer import Timer, msec, seconds, msec_str, sec_str, to_seconds
-from lib.extra_game_handlers_wrapper import game_specific_options
+from extra_game_handlers import game_specific_options
 from typing import Any, Optional, Union, Literal, Type
 from types import TracebackType
 OPTIONS_TYPE = dict[str, Any]

lib/model.py

@@ -98,7 +98,7 @@ def is_supported(self, config: Configuration,
             if self.from_self:
                 return True, ""
 
-            from lib.extra_game_handlers_wrapper import is_supported_extra
+            from extra_game_handlers import is_supported_extra
 
             allowed_opponents: list[str] = list(filter(None, config.allow_list)) or [self.challenger.name]
             decline_reason = (self.decline_due_to(config.accept_bot or not self.challenger.is_bot, "noBot")

wiki/How-to-use-the-Docker-image.md

@@ -26,7 +26,6 @@ That's all!
 
 ### Warning:
 - Make sure you've set the `dir` and `working_dir` attributes of your `config.yml` to the right path (remember the engine runs in the container's OS, so the path should start with `/lichess-bot/config/`).
-- If you are using a homemade engine provided in the original [`homemade.py` file in the Github project](https://github.com/lichess-bot-devs/lichess-bot/blob/master/homemade.py), you **must** add this file to the folder containing your configuration files.
 - **If you've configured a folder to save pgn files** using [`pgn_directory`](https://github.com/lichess-bot-devs/lichess-bot/wiki/Configure-lichess-bot#other-options) that is not in `/lichess-bot/config` directory, always mount a volume to that folder. Without that, your saved games will remain unreachable from the outside of the container, and storing a lot of games in the container's file system could result in disk saturation.
 - The container uses the standard docker logging system and the bot is always launched with the `--disable_auto_logging` option.
   Use the `docker logs myBot` [command](https://docs.docker.com/reference/cli/docker/container/logs/) to access to the bot logs.