Implemented marconi-server entry point

This patch adds the first console_script for marconi server.

In order to use it it's enough to run setup.py either using develop or
install.

Side changes:
    The config now uses sys.argv[1:] if no custom cli args have been
    set.

Implements blueprint transport-base

Change-Id: I15732129d66b32fca2b818e9105b17f541094983

etc/marconi.conf-sample

@@ -11,4 +11,5 @@ port = 8888
 ;port = 9999
 
 [drivers:storage:mongodb]
-uri = mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test&ssl=true&w=majority
+uri = mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test&ssl=true&w=majority
+database = marconi

marconi/bin/server.py

@@ -0,0 +1,33 @@
+# Copyright (c) 2013 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+
+from marconi import bootstrap
+
+
+def fail(returncode, e):
+    sys.stderr.write("ERROR: %s\n" % e)
+    sys.exit(returncode)
+
+
+def run():
+    try:
+        server = bootstrap.Bootstrap()
+        server.run()
+    except KeyboardInterrupt:
+        fail(1, '... terminating marconi')
+    except RuntimeError as e:
+        fail(1, e)

marconi/common/config.py

@@ -52,12 +52,15 @@ A call to `.load` without an argument looks up for the default ones:
     ~/.marconi/marconi.conf
     /etc/marconi/marconi.conf
 
-The global config variables, if any, can also be read from the command
+Global config variables, if any, will be read from the command line using
-line arguments by saving them before a `.load` call:
+sys.argv[:1]. If needed, this can be overwritten by calling `set_cli`
+before calling `.load`
 
-    cfg_handle.set_cli(sys.argv[1:])
+    cfg_handle.set_cli([])
 """
 
+import sys
+
 from oslo.config import cfg
 
 
@@ -73,7 +76,7 @@ def _init():
         __setattr__ = dict.__setitem__
 
     conf = cfg.ConfigOpts()
-    my = Obj(args=[])
+    my = Obj(args=sys.argv[1:])
 
     def namespace(name, title=None):
         """

marconi/tests/util/base.py

@@ -51,6 +51,8 @@ class TestBase(testtools.TestCase):
 
         :returns: Project's config object.
         """
+        # Reset CLI
+        cfg.set_cli([])
         cfg.load(self.conf_path(filename))
         return cfg
 

setup.py

@@ -38,4 +38,8 @@ setuptools.setup(
     install_requires=requires,
     dependency_links=dependency_links,
     cmdclass=common_setup.get_cmdclass(),
+    entry_points={
+        'console_scripts':
+            ['marconi-server = marconi.bin.server:run']
+    }
 )