diff -r 9c2fbb872e91 -r 5e5e224239c3 cubicweb/server/__init__.py
--- a/cubicweb/server/__init__.py	Fri Jul 08 10:17:42 2016 +0200
+++ b/cubicweb/server/__init__.py	Fri Jul 08 09:59:18 2016 +0200
@@ -24,9 +24,6 @@
 
 __docformat__ = "restructuredtext en"
 
-import sys
-from os.path import join, exists
-from glob import glob
 from contextlib import contextmanager
 
 from six import text_type, string_types
@@ -39,9 +36,9 @@
 
 from yams import BASE_GROUPS
 
-from cubicweb import CW_SOFTWARE_ROOT
 from cubicweb.appobject import AppObject
 
+
 class ShuttingDown(BaseException):
     """raised when trying to access some resources while the repository is
     shutting down. Inherit from BaseException so that `except Exception` won't
@@ -90,7 +87,7 @@
 #: more verbosity
 DBG_MORE = 128
 #: all level enabled
-DBG_ALL  = DBG_RQL + DBG_SQL + DBG_REPO + DBG_MS + DBG_HOOKS + DBG_OPS + DBG_SEC + DBG_MORE
+DBG_ALL = DBG_RQL + DBG_SQL + DBG_REPO + DBG_MS + DBG_HOOKS + DBG_OPS + DBG_SEC + DBG_MORE
 
 _SECURITY_ITEMS = []
 _SECURITY_CAPS = ['read', 'add', 'update', 'delete', 'transition']
@@ -98,6 +95,7 @@
 #: current debug mode
 DEBUG = 0
 
+
 @contextmanager
 def tunesecurity(items=(), capabilities=()):
     """Context manager to use in conjunction with DBG_SEC.
@@ -136,6 +134,7 @@
     _SECURITY_ITEMS[:] = olditems
     _SECURITY_CAPS[:] = oldactions
 
+
 def set_debug(debugmode):
     """change the repository debugging mode"""
     global DEBUG
@@ -148,6 +147,7 @@
     else:
         DEBUG |= debugmode
 
+
 class debugged(object):
     """Context manager and decorator to help debug the repository.
 
@@ -184,7 +184,6 @@
     def __call__(self, func):
         """decorate function"""
         def wrapped(*args, **kwargs):
-            _clevel = DEBUG
             set_debug(self.debugmode)
             try:
                 return func(*args, **kwargs)
@@ -192,6 +191,7 @@
                 set_debug(self._clevel)
         return wrapped
 
+
 # database initialization ######################################################
 
 def create_user(session, login, pwd, *groups):
@@ -203,6 +203,7 @@
                         {'u': user.eid, 'group': text_type(group)})
     return user
 
+
 def init_repository(config, interactive=True, drop=False, vreg=None,
                     init_config=None):
     """initialise a repository database by creating tables add filling them
@@ -289,18 +290,18 @@
             cnx.create_entity('CWGroup', name=text_type(group))
         admin = create_user(cnx, login, pwd, u'managers')
         cnx.execute('SET X owned_by U WHERE X is IN (CWGroup,CWSource), U eid %(u)s',
-                        {'u': admin.eid})
+                    {'u': admin.eid})
         cnx.commit()
     repo.shutdown()
     # re-login using the admin user
-    config._cubes = None # avoid assertion error
+    config._cubes = None  # avoid assertion error
     repo = get_repository(config=config)
     # replace previous schema by the new repo's one. This is necessary so that we give the proper
     # schema to `initialize_schema` above since it will initialize .eid attribute of schema elements
     schema = repo.schema
     with connect(repo, login, password=pwd) as cnx:
         with cnx.security_enabled(False, False):
-            repo.system_source.eid = ssource.eid # redo this manually
+            repo.system_source.eid = ssource.eid  # redo this manually
             handler = config.migration_handler(schema, interactive=False,
                                                cnx=cnx, repo=repo)
             # serialize the schema
@@ -348,7 +349,7 @@
 
 
 # sqlite'stored procedures have to be registered at connection opening time
-from logilab.database import SQL_CONNECT_HOOKS
+from logilab.database import SQL_CONNECT_HOOKS  # noqa
 
 # add to this set relations which should have their add security checking done
 # *BEFORE* adding the actual relation (done after by default)