Use oslo-config-2013.1b4

The cfg API is now available via the oslo-config library, so switch to
it and remove the copied-and-pasted version.

Add the 2013.1b4 tarball to tools/pip-requires - this will be changed
to 'oslo-config>=2013.1' when oslo-config is published to pypi. This
will happen in time for grizzly final.

Add dependency_links to setup.py so that oslo-config can be installed
from the tarball URL specified in pip-requires.

Remove the 'deps = pep8==1.3.3' from tox.ini as it means all the other
deps get installed with easy_install which can't install oslo-config
from the URL.

Make tools/hacking.py include oslo in IMPORT_EXCEPTIONS like it already
does for paste. It turns out imp.find_module() doesn't correct handle
namespace packages.

Retain dummy cfg.py file until keystoneclient middleware has been
updated (I18c450174277c8e2d15ed93879da6cd92074c27a).

Change-Id: I4815aeb8a9341a31a250e920157f15ee15cfc5bc

tools/conf/analyze_opts.py

@@ -26,7 +26,7 @@ import os
 import sys
 
 sys.path.append(os.getcwd())
-from nova.openstack.common import iniparser
+from oslo.config import iniparser
 
 
 class PropertyCollecter(iniparser.BaseParser):

tools/conf/extract_opts.py

@@ -26,7 +26,8 @@ import socket
 import sys
 import textwrap
 
-from nova.openstack.common import cfg
+from oslo.config import cfg
+
 from nova.openstack.common import importutils
 
 

tools/hacking.py

@@ -48,7 +48,9 @@ logging.disable('LOG')
 
 IMPORT_EXCEPTIONS = ['sqlalchemy', 'migrate', 'nova.db.sqlalchemy.session',
                      'nova.openstack.common.log.logging',
-                     'nova.db.sqlalchemy.migration.versioning_api', 'paste']
+                     'nova.db.sqlalchemy.migration.versioning_api']
+# imp.find_module() doesn't support namespace packages
+IMPORT_EXCEPTIONS += ['oslo', 'paste']
 # Paste is missing a __init__ in top level directory
 START_DOCSTRING_TRIPLE = ['u"""', 'r"""', '"""', "u'''", "r'''", "'''"]
 END_DOCSTRING_TRIPLE = ['"""', "'''"]

tools/install_venv_common.py

@@ -32,7 +32,7 @@ if os.path.exists(os.path.join(possible_topdir, "nova",
     sys.path.insert(0, possible_topdir)
 
 
-from nova.openstack.common import cfg
+from oslo.config import cfg
 
 
 class InstallVenv(object):

tools/pip-requires

@@ -27,3 +27,4 @@ python-glanceclient>=0.5.0,<2
 python-keystoneclient>=0.2.0
 stevedore>=0.7
 websockify
+http://tarballs.openstack.org/oslo-config/oslo-config-2013.1b4.tar.gz#egg=oslo-config

tools/test-requires

@@ -9,6 +9,7 @@ mox==0.5.3
 MySQL-python
 psycopg2
 pep8==1.3.3
+pyflakes
 pylint==0.25.2
 python-subunit
 sphinx>=1.1.2

tools/xenserver/destroy_cached_images.py

@@ -16,6 +16,8 @@ eventlet.monkey_patch()
 import os
 import sys
 
+from oslo.config import cfg
+
 # If ../nova/__init__.py exists, add ../ to Python search path, so that
 # it will override what happens to be installed in /usr/(local/)lib/python...
 POSSIBLE_TOPDIR = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
@@ -26,7 +28,6 @@ if os.path.exists(os.path.join(POSSIBLE_TOPDIR, 'nova', '__init__.py')):
     sys.path.insert(0, POSSIBLE_TOPDIR)
 
 from nova import config
-from nova.openstack.common import cfg
 from nova.openstack.common import log as logging
 from nova import utils
 from nova.virt.xenapi import driver as xenapi_driver

tools/xenserver/vm_vdi_cleaner.py

@@ -19,6 +19,8 @@
 import doctest
 import os
 import sys
+
+from oslo.config import cfg
 import XenAPI
 
 
@@ -30,7 +32,6 @@ if os.path.exists(os.path.join(possible_topdir, "nova", "__init__.py")):
 from nova import context
 from nova import db
 from nova import exception
-from nova.openstack.common import cfg
 from nova.openstack.common import timeutils
 from nova.virt import virtapi
 from nova.virt.xenapi import driver as xenapi_driver