rewrite: Update meta.

bot/meta/app.py

@@ -1,9 +1,24 @@
+"""
+appname: str
+    The base identifer for this application.
+    This identifies which services the app offers.
+shardname: str
+    The specific name of the running application.
+    Only one process should be connecteded with a given appname.
+    For the bot apps, usually specifies the shard id and shard number.
+"""
+# TODO: Find a better schema for these. We use appname for shard_talk, do we need it for data?
+
 from . import sharding, conf
 from .logger import log_app
 from .ipc.client import AppClient
 from .args import args
 
 
+appname = conf.data['appid']
+appid = appname  # backwards compatibility
+
+
 def appname_from_shard(shardid):
     appname = f"{conf.data['appid']}_{sharding.shard_count:02}_{shardid:02}"
     return appname
@@ -13,16 +28,13 @@ 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']
+shardname = appname_from_shard(sharding.shard_number)
 
-log_app.set(appname)
+log_app.set(shardname)
 
 
 shard_talk = AppClient(
-    appname,
+    shardname,
     {'host': args.host, 'port': args.port},
     {'host': conf.appipc['server_host'], 'port': int(conf.appipc['server_port'])}
 )