Refs #33: Break server out into an optional feature.

docs/installation.rst

@@ -13,6 +13,11 @@ Or, if you have virtualenvwrapper installed::
     $ mkvirtualenv ouimeaux
     $ pip install ouimeaux
 
+If you want to enable ``wemo server`` functionality, specify the ``server``
+feature to install the necessary dependencies::
+
+    $ pip install ouimeaux[server]
+
 Linux
 -----
 ouimeaux requires Python header files to build some dependencies, and is

docs/server.rst

@@ -5,6 +5,11 @@ Server
 ``wemo server`` starts a process serving up both a Web app providing basic
 device control and a REST API allowing integration with any number of services.
 
+The necessary dependencies to run the server are not installed unless the
+``server`` feature is specified at installation::
+
+    $ pip install ouimeaux[server]
+
 Configuration
 -------------
 The IP and port to which the server will bind are specified by the ``listen``

ouimeaux/cli.py

@@ -285,8 +285,12 @@ def on_bridge(bridge):
 
 
 def server(args):
-    from socketio.server import SocketIOServer
-    from ouimeaux.server import app, initialize
+    try:
+        from socketio.server import SocketIOServer
+        from ouimeaux.server import app, initialize
+    except ImportError:
+        print "ouimeaux server dependencies are not installed. Please run, e.g., 'pip install ouimeaux[server]'"
+        sys.exit(1)
     initialize(bind=getattr(args, 'bind', None))
     level = logging.INFO
     if getattr(args, 'debug', False):

requirements.txt

@@ -2,5 +2,3 @@ gevent >= 1.0
 requests >= 2.3.0
 pyyaml
 pysignals
-flask-restful
-gevent-socketio

setup.py

@@ -54,5 +54,8 @@
             'wemo = ouimeaux.cli:wemo'
         ]
     },
+    extras_require = {
+        'server':  ["flask-restful", "gevent-socketio"],
+    },
     test_suite='tests',
 )