Grouping config options

Author: matburt

receptor/config.py

@@ -144,6 +144,16 @@ def __init__(self, args=None):
             value_type='int',
             hint='If specified, the node will ping all other known nodes in the mesh every N seconds. The default is -1, meaning no pings are sent.',
         )
+        self.add_config_option(
+            section='node',
+            key='groups',
+            short_option='-g',
+            long_option='--group',
+            default_value=[],
+            value_type='list',
+            listof='str',
+            hint='Define membership in one or more groups to aid in message routing',
+        )
         # Controller options
         self.add_config_option(
             section='controller',

receptor/protocol.py

@@ -109,7 +109,8 @@ def send_handshake(self):
             "cmd": "HI",
             "id": self.receptor.node_id,
             "expire_time": time.time() + 10,
-            "capabilities": self.receptor.work_manager.get_capabilities(),
+            "meta": dict(capabilities=self.receptor.work_manager.get_capabilities(),
+                         groups=self.receptor.config.node_groups),
         }).encode("utf-8")
         self.transport.write(msg + DELIM)