Read database path from config in alembic env.py

Slightly related to #135

alembic.ini

@@ -35,9 +35,6 @@ script_location = alembic
 # are written from script.py.mako
 # output_encoding = utf-8
 
-sqlalchemy.url = sqlite:///mautrix-telegram.db
-
-
 # Logging configuration
 [loggers]
 keys = root,sqlalchemy,alembic

alembic/env.py

@@ -1,4 +1,3 @@
-from __future__ import with_statement
 from alembic import context
 from sqlalchemy import engine_from_config, pool
 from logging.config import fileConfig
@@ -8,12 +7,19 @@ from os.path import abspath, dirname
 sys.path.insert(0, dirname(dirname(abspath(__file__))))
 
 from mautrix_telegram.base import Base
+from mautrix_telegram.config import Config
 import mautrix_telegram.db
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
 
+mxtg_config_path = context.get_x_argument(as_dictionary=True).get("config", "config.yaml")
+mxtg_config = Config(mxtg_config_path, None, None)
+mxtg_config.load()
+config.set_main_option("sqlalchemy.url",
+                       mxtg_config.get("appservice.database", "sqlite:///mautrix-telegram.db"))
+
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 fileConfig(config.config_file_name)

docker/root/etc/s6.d/mautrix-telegram/run

@@ -10,12 +10,11 @@ function fixperms {
 cd /opt/mautrixtelegram
 export FFMPEG_BINARY=/usr/bin/ffmpeg
 
-# Replace database path in alembic.ini
-sed -i "s#sqlite:///mautrix-telegram.db#sqlite:////data/mautrix-telegram.db#" alembic.ini
+# Replace database path in config.
 sed -i "s#sqlite:///mautrix-telegram.db#sqlite:////data/mautrix-telegram.db#" /data/config.yaml
 
 # Check that database is in the right state
-alembic upgrade head
+alembic -x config=/data/config.yaml upgrade head
 
 if [[ ! -f /data/config.yaml ]]; then
 	cp example-config.yaml /data/config.yaml

mautrix_telegram/__main__.py

@@ -26,7 +26,7 @@ from alchemysession import AlchemySessionContainer
 from mautrix_appservice import AppService
 
 from .base import Base
-from .config import Config, DictWithRecursion
+from .config import Config
 from .matrix import MatrixHandler
 
 from .db import init as init_db