Changed how the DaemonClient get its address + better exception

I'm still not satisfied but can't come up with a good solution

supysonic/config.py

@@ -16,6 +16,10 @@ except ImportError:
 import os
 import tempfile
 
+current_config = None
+def get_current_config():
+    return current_config or DefaultConfig()
+
 class DefaultConfig(object):
     DEBUG = False
 
@@ -47,6 +51,9 @@ class DefaultConfig(object):
     TRANSCODING = {}
     MIMETYPES = {}
 
+    def __init__(self):
+        current_config = self
+
 class IniConfig(DefaultConfig):
     common_paths = [
         '/etc/supysonic',
@@ -56,6 +63,8 @@ class IniConfig(DefaultConfig):
     ]
 
     def __init__(self, paths):
+        super(IniConfig, self).__init__()
+
         parser = RawConfigParser()
         parser.read(paths)
 

supysonic/daemon.py

@@ -11,12 +11,12 @@ import logging
 
 from multiprocessing.connection import Client, Listener
 
-from .config import IniConfig
+from .config import get_current_config
 from .py23 import strtype
 from .utils import get_secret_key
 from .watcher import SupysonicWatcher
 
-__all__ = [ 'Daemon', 'DaemonClient' ]
+__all__ = [ 'Daemon', 'DaemonClient', 'DaemonUnavailableError' ]
 
 logger = logging.getLogger(__name__)
 
@@ -25,13 +25,21 @@ WATCHER = 0
 W_ADD = 0
 W_DEL = 1
 
+class DaemonUnavailableError(Exception):
+    pass
+
 class DaemonClient(object):
     def __init__(self, address = None):
-        self.__address = address or IniConfig.from_common_locations().DAEMON['socket']
+        self.__address = address or get_current_config().DAEMON['socket']
         self.__key = get_secret_key('daemon_key')
 
     def __get_connection(self):
-        return Client(address = self.__address, authkey = self.__key)
+        if not self.__address:
+            raise DaemonUnavailableError('No daemon address set')
+        try:
+            return Client(address = self.__address, authkey = self.__key)
+        except (FileNotFoundError, ConnectionRefusedError):
+            raise DaemonUnavailableError("Couldn't connect to daemon at {}".format(self.__address))
 
     def add_watched_folder(self, folder):
         if not isinstance(folder, strtype):

supysonic/managers/folder.py

@@ -13,7 +13,7 @@ import uuid
 from pony.orm import select
 from pony.orm import ObjectNotFound
 
-from ..daemon import DaemonClient
+from ..daemon import DaemonClient, DaemonUnavailableError
 from ..db import Folder, Track, Artist, Album, User, RatingTrack, StarredTrack
 from ..py23 import strtype
 
@@ -47,7 +47,7 @@ class FolderManager:
         folder = Folder(root = True, name = name, path = path)
         try:
             DaemonClient().add_watched_folder(path)
-        except (ConnectionRefusedError, FileNotFoundError):
+        except DaemonUnavailableError:
             pass
 
         return folder
@@ -60,7 +60,7 @@ class FolderManager:
 
         try:
             DaemonClient().remove_watched_folder(folder.path)
-        except (ConnectionRefusedError, FileNotFoundError):
+        except DaemonUnavailableError:
             pass
 
         for user in User.select(lambda u: u.last_play.root_folder == folder):