Fixing initial migration

The last commit broke the initial migration(which is worse, because it was the
only substantial migration). This commit keeps from setting up the DB before
running migrations. If any future migrations need to read from the DB they
will need to do the same dance that's in 002.

Change-Id: Icedf99d95b538cb24cccccc4d47ef68bdf225b4c

bin/melange-manage

@@ -35,8 +35,6 @@ possible_topdir = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
 if os.path.exists(os.path.join(possible_topdir, 'melange', '__init__.py')):
     sys.path.insert(0, possible_topdir)
 
-from melange import ipv4
-from melange import mac
 from melange import version
 from melange.common import config
 from melange.common import utils
@@ -63,20 +61,13 @@ class Commands(object):
     def __init__(self, conf):
         self.conf = conf
 
-    def _db_connect(self):
-        conf, app = config.Config.load_paste_app('melange', options, args)
-        db_api.configure_db(conf, ipv4.plugin(), mac.plugin())
-
     def db_sync(self):
-        self._db_connect()
         db_api.db_sync(self.conf)
 
     def db_upgrade(self, version=None, repo_path=None):
-        self._db_connect()
         db_api.db_upgrade(self.conf, version, repo_path=repo_path)
 
     def db_downgrade(self, version, repo_path=None):
-        self._db_connect()
         db_api.db_downgrade(self.conf, version, repo_path=repo_path)
 
     def routes(self, version):
@@ -136,7 +127,6 @@ if __name__ == '__main__':
     try:
         conf = config.Config.load_paste_config('melange', options, args)
         config.setup_logging(options, conf)
-        db_api.configure_db(conf, ipv4.plugin(), mac.plugin())
 
         command_name = args.pop(0)
         Commands(conf).execute(command_name, *args)

melange/db/sqlalchemy/migrate_repo/versions/002_device_id_to_uuid.py

@@ -15,16 +15,19 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-#import optparse
+import optparse
 
-#from melange import ipv4
+from melange import ipv4
-#from melange import mac
+from melange import mac
-#from melange.common import config
+from melange import version
+from melange.common import config
 from melange.db import db_api
 from melange.db.sqlalchemy import session
 
 
 def upgrade(migrate_engine):
+    _db_connect()
+
     interface = session.get_session().execute(
         "SELECT COUNT(1) as count FROM interfaces "
         "WHERE device_id NOT REGEXP '.*-.*' AND device_id IS NOT NULL")
@@ -44,12 +47,35 @@ $ python melange/db/sqlalchemy/migrate_repo/versions/002_device_id_to_uuid.py\\
 ---------------------------------------------------------
 """
 
-    # check for uuids in interfaces.device_id
-
 
 def downgrade(migrate_engine):
     pass
 
+
+def _db_connect():
+    # If you really need to do another migration before all of this goes into
+    # quantum, and you need to access the DB, this is what you need:
+    oparser = optparse.OptionParser(version="%%prog %s"
+                                    % version.version_string())
+    create_options(oparser)
+    (options, args) = config.parse_options(oparser)
+    conf, app = config.Config.load_paste_app('melange', options, args)
+    db_api.configure_db(conf, ipv4.plugin(), mac.plugin())
+
+
+def create_options(parser):
+    """Sets up the CLI and config-file options.
+    :param parser: The option parser
+    :returns: None
+    """
+    parser.add_option('-p', '--port', dest="port", metavar="PORT",
+                      type=int, default=9898,
+                      help="Port the Melange API host listens on. "
+                      "Default: %default")
+    config.add_common_options(parser)
+    config.add_log_options(parser)
+
+
 if __name__ == '__main__':
     import gettext
     import optparse