entropy.client.interfaces: rename all the mixin classes appending "Mixin"

libraries/entropy/client/interfaces/cache.py

@@ -26,7 +26,7 @@ from entropy.exceptions import *
 from entropy.output import red, darkred, darkgreen
 from entropy.i18n import _
 
-class Cache:
+class CacheMixin:
 
     def validate_repositories_cache(self):
         # is the list of repos changed?

libraries/entropy/client/interfaces/client.py

@@ -25,14 +25,16 @@ import os
 from entropy.core import Singleton
 from entropy.output import TextInterface
 from entropy.db import dbapi2
-from entropy.client.interfaces.loaders import Loaders
-from entropy.client.interfaces.cache import Cache
-from entropy.client.interfaces.dep import Calculators
-from entropy.client.interfaces.methods import Repository as CRepository, Misc, Match
-from entropy.client.interfaces.fetch import Fetchers
-from entropy.client.interfaces.metadata import Extractors
+from entropy.client.interfaces.loaders import LoadersMixin
+from entropy.client.interfaces.cache import CacheMixin
+from entropy.client.interfaces.dep import CalculatorsMixin
+from entropy.client.interfaces.methods import RepositoryMixin, MiscMixin, \
+    MatchMixin
+from entropy.client.interfaces.fetch import FetchersMixin
+from entropy.client.interfaces.metadata import ExtractorsMixin
 from entropy.const import etpConst, etpCache
 from entropy.core import SystemSettings, SystemSettingsPlugin
+from entropy.exceptions import SystemDatabaseError
 
 class ClientSystemSettingsPlugin(SystemSettingsPlugin):
 
@@ -70,8 +72,8 @@ class ClientSystemSettingsPlugin(SystemSettingsPlugin):
         system_settings_instance['repos_system_mask_installed'] = mask_installed
         system_settings_instance['repos_system_mask_installed_keys'] = mask_installed_keys
 
-class Client(Singleton, TextInterface, Loaders, Cache, Calculators, \
-        CRepository, Misc, Match, Fetchers, Extractors):
+class Client(Singleton, TextInterface, LoadersMixin, CacheMixin, CalculatorsMixin, \
+        RepositoryMixin, MiscMixin, MatchMixin, FetchersMixin, ExtractorsMixin):
 
     def init_singleton(self, indexing = True, noclientdb = 0,
             xcache = True, user_xcache = False, repo_validation = True,
@@ -140,7 +142,7 @@ class Client(Singleton, TextInterface, Loaders, Cache, Calculators, \
             self.UGC = ugcClient(self)
 
         # class init
-        Loaders.__init__(self)
+        LoadersMixin.__init__(self)
 
         self.xcache = xcache
         shell_xcache = os.getenv("ETP_NOCACHE")

libraries/entropy/client/interfaces/dep.py

@@ -26,7 +26,7 @@ from entropy.exceptions import *
 from entropy.output import bold, darkgreen, darkred, blue, red
 from entropy.i18n import _
 
-class Calculators:
+class CalculatorsMixin:
 
     def dependencies_test(self, dbconn = None):
 

libraries/entropy/client/interfaces/fetch.py

@@ -26,7 +26,7 @@ from entropy.const import *
 from entropy.exceptions import *
 from entropy.output import purple, bold, red, blue, darkgreen, darkred, brown, darkblue
 
-class Fetchers:
+class FetchersMixin:
 
     def check_needed_package_download(self, filepath, checksum = None):
         # is the file available

libraries/entropy/client/interfaces/loaders.py

@@ -23,7 +23,7 @@ from __future__ import with_statement
 from entropy.const import *
 from entropy.exceptions import *
 
-class Loaders:
+class LoadersMixin:
 
     __QA_cache = {}
     __security_cache = {}

libraries/entropy/client/interfaces/metadata.py

@@ -27,7 +27,7 @@ from entropy.const import *
 from entropy.exceptions import *
 from entropy.output import red, bold, brown
 
-class Extractors:
+class ExtractorsMixin:
 
     def _extract_pkg_metadata_generate_extraction_dict(self):
         data = {

libraries/entropy/client/interfaces/methods.py

@@ -32,7 +32,7 @@ from entropy.db import dbapi2, LocalRepository
 from entropy.output import purple, bold, red, blue, darkgreen, darkred, brown
 
 
-class Repository:
+class RepositoryMixin:
 
     __repo_error_messages_cache = set()
     __repodb_cache = {}
@@ -765,7 +765,7 @@ class Repository:
         return self.disable_repository(repoid)
 
 
-class Misc:
+class MiscMixin:
 
     def reload_constants(self):
         initconfig_entropy_constants(etpSys['rootdir'])
@@ -1423,7 +1423,7 @@ class Misc:
         return self.switch_chroot(*args, **kwargs)
 
 
-class Match:
+class MatchMixin:
 
     def get_package_action(self, match):
         """