Automatic logger level changes on import

Breaking changes: plugins should set set _import_stages instead of
import_stages. From outside the latter is replaced by import_stages().
This is because it is now wrapped with log level-getting & -setting
statements.

beets/plugins.py

@@ -18,6 +18,7 @@ import traceback
 import inspect
 import re
 from collections import defaultdict
+from functools import wraps
 
 
 import beets
@@ -51,7 +52,7 @@ class BeetsPlugin(object):
     def __init__(self, name=None):
         """Perform one-time plugin setup.
         """
-        self.import_stages = []
+        self._import_stages = []
         self.name = name or self.__module__.split('.')[-1]
         self.config = beets.config[self.name]
         if not self.template_funcs:
@@ -63,7 +64,7 @@ class BeetsPlugin(object):
 
         logger_name = '{0}.{1}'.format('beets', self.name)
         self._log = logging.getLogger(logger_name)
-        self._log.setLevel(logging.WARNING)
+        self._log.setLevel(logging.INFO)
 
     def commands(self):
         """Should return a list of beets.ui.Subcommand objects for
@@ -71,6 +72,20 @@ class BeetsPlugin(object):
         """
         return ()
 
+    def import_stages(self):
+        return [self._set_log_level(logging.WARNING, import_stage)
+                for import_stage in self._import_stages]
+
+    def _set_log_level(self, log_level, func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            old_log_level = self._log.getEffectiveLevel()
+            self._log.setLevel(log_level)
+            result = func(*args, **kwargs)
+            self._log.setLevel(old_log_level)
+            return result
+        return wrapper
+
     def queries(self):
         """Should return a dict mapping prefixes to Query subclasses.
         """
@@ -353,8 +368,7 @@ def import_stages():
     """Get a list of import stage functions defined by plugins."""
     stages = []
     for plugin in find_plugins():
-        if hasattr(plugin, 'import_stages'):
-            stages += plugin.import_stages
+        stages += plugin.import_stages()
     return stages
 
 

beetsplug/convert.py

@@ -365,7 +365,7 @@ class ConvertPlugin(BeetsPlugin):
             u'never_convert_lossy_files': False,
             u'copy_album_art': False,
         })
-        self.import_stages = [self.auto_convert]
+        self._import_stages = [self.auto_convert]
 
     def commands(self):
         cmd = ui.Subcommand('convert', help='convert to external location')

beetsplug/echonest.py

@@ -139,7 +139,7 @@ class EchonestMetadataPlugin(plugins.BeetsPlugin):
             config['echonest']['apikey'].get(unicode)
 
         if self.config['auto']:
-            self.import_stages = [self.imported]
+            self._import_stages = [self.imported]
 
     def _echofun(self, func, **kwargs):
         """Wrapper for requests to the EchoNest API.  Will retry up to

beetsplug/fetchart.py

@@ -336,7 +336,7 @@ class FetchArtPlugin(plugins.BeetsPlugin):
         self.maxwidth = self.config['maxwidth'].get(int)
         if self.config['auto']:
             # Enable two import hooks when fetching is enabled.
-            self.import_stages = [self.fetch_art]
+            self._import_stages = [self.fetch_art]
             self.register_listener('import_task_files', self.assign_art)
 
         available_sources = list(SOURCES_ALL)

beetsplug/ftintitle.py

@@ -128,7 +128,7 @@ class FtInTitlePlugin(plugins.BeetsPlugin):
             help='drop featuring from artists and ignore title update')
 
         if self.config['auto']:
-            self.import_stages = [self.imported]
+            self._import_stages = [self.imported]
 
     def commands(self):
 

beetsplug/keyfinder.py

@@ -36,7 +36,7 @@ class KeyFinderPlugin(BeetsPlugin):
             u'overwrite': False,
         })
         self.config['auto'].get(bool)
-        self.import_stages = [self.imported]
+        self._import_stages = [self.imported]
 
     def commands(self):
         cmd = ui.Subcommand('keyfinder',

beetsplug/lastgenre/__init__.py

@@ -145,7 +145,7 @@ class LastGenrePlugin(plugins.BeetsPlugin):
         """Setup plugin from config options
         """
         if self.config['auto']:
-            self.import_stages = [self.imported]
+            self._import_stages = [self.imported]
 
         self._genre_cache = {}
 

beetsplug/lyrics.py

@@ -442,7 +442,7 @@ SOURCE_BACKENDS = {
 class LyricsPlugin(plugins.BeetsPlugin):
     def __init__(self):
         super(LyricsPlugin, self).__init__()
-        self.import_stages = [self.imported]
+        self._import_stages = [self.imported]
         self.config.add({
             'auto': True,
             'google_API_key': None,

beetsplug/mbcollection.py

@@ -105,7 +105,7 @@ class MusicBrainzCollectionPlugin(BeetsPlugin):
         )
         self.config.add({'auto': False})
         if self.config['auto']:
-            self.import_stages = [self.imported]
+            self._import_stages = [self.imported]
 
     def commands(self):
         return [update_mb_collection_cmd]

beetsplug/replaygain.py

@@ -601,7 +601,7 @@ class ReplayGainPlugin(BeetsPlugin):
 
     def __init__(self):
         super(ReplayGainPlugin, self).__init__()
-        self.import_stages = [self.imported]
+        self._import_stages = [self.imported]
 
         # default backend is 'command' for backward-compatibility.
         self.config.add({