Source Code for Module rosgraph.rosenv

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32   
33  import os 
34  import sys 
35   
36  ROS_MASTER_URI   = "ROS_MASTER_URI" 
37   
38  ROS_IP           ="ROS_IP" 
39  ROS_IPV6         ="ROS_IPV6" 
40  ROS_HOSTNAME     ="ROS_HOSTNAME" 
41  ROS_NAMESPACE    ="ROS_NAMESPACE" 
42   
43  DEFAULT_MASTER_PORT = 11311  # default port for master's to bind to 
44  DEFAULT_MASTER_URI = 'http://localhost:%s/' % DEFAULT_MASTER_PORT 
45   
46 -def get_master_uri(env=None, argv=None): 
47      """ 
48      Get the :envvar:`ROS_MASTER_URI` setting from the command-line args or 
49      environment, command-line args takes precedence. 
50   
51      :param env: override environment dictionary, ``dict`` 
52      :param argv: override ``sys.argv``, ``[str]`` 
53      :raises: :exc:`ValueError` If :envvar:`ROS_MASTER_URI` value is invalidly 
54        specified  
55      """     
56      if env is None: 
57          env = os.environ 
58      if argv is None: 
59          argv = sys.argv 
60       
61      for arg in argv: 
62          if arg.startswith('__master:='): 
63              val = None 
64              try: 
65                  _, val = arg.split(':=') 
66              except: 
67                  pass 
68               
69              # we ignore required here because there really is no 
70              # correct return value as the configuration is bad 
71              # rather than unspecified 
72              if not val: 
73                  raise ValueError("__master remapping argument '%s' improperly specified"%arg) 
74              return val 
75      return env.get(ROS_MASTER_URI, DEFAULT_MASTER_URI) 
76