plugin mr mercurial, tools(common/utils): moved command protocol to a new module

sat/tools/utils.py

@@ -21,12 +21,7 @@
 
 import unicodedata
 import os.path
-from sat.core.constants import Const as C
-from sat.core.log import getLogger
-
-log = getLogger(__name__)
 import datetime
-from twisted.python import procutils
 import subprocess
 import time
 import sys
@@ -34,6 +29,11 @@ import random
 import inspect
 import textwrap
 import functools
+from twisted.python import procutils
+from sat.core.constants import Const as C
+from sat.core.log import getLogger
+
+log = getLogger(__name__)
 
 
 NO_REPOS_DATA = u"repository data unknown"
@@ -56,6 +56,12 @@ def clean_ustr(ustr):
     return "".join(valid_chars(ustr))
 
 
+def logError(failure_):
+    """Genertic errback which log the error as a warning, and re-raise it"""
+    log.warning(failure_.value)
+    raise failure_
+
+
 def partial(func, *fixed_args, **fixed_kwargs):
     # FIXME: temporary hack to workaround the fact that inspect.getargspec is not working with functools.partial
     #        making partial unusable with current D-bus module (in addMethod).