rewrite: Implement shard IPC server.

bot/meta/app.py

@@ -0,0 +1,33 @@
+from . import sharding, conf
+from .logger import log_app
+from .ipc.client import AppClient
+from .args import args
+
+
+def appname_from_shard(shardid):
+    appname = f"{conf.data['appid']}_{sharding.shard_count:02}_{shardid:02}"
+    return appname
+
+
+def shard_from_appname(appname: str):
+    return int(appname.rsplit('_', maxsplit=1)[-1])
+
+
+if sharding.sharded:
+    appname = appname_from_shard(sharding.shard_number)
+else:
+    appname = conf.data['appid']
+
+log_app.set(appname)
+
+
+shard_talk = AppClient(
+    appname,
+    {'host': args.host, 'port': args.port},
+    {'host': conf.appipc['server_host'], 'port': int(conf.appipc['server_port'])}
+)
+
+
+@shard_talk.register_route()
+async def ping():
+    return "Pong!"