Source Code for Module roslib.stack_manifest

  1  #! /usr/bin/env python 
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 34  # Revision $Id: stack_manifest.py 6490 2009-10-12 21:26:50Z kwc $ 
 35  # $Author: kwc $ 
 36   
 37  """ 
 38  Python parser for rospack stack.xml files. See U{http://pr.willowgarage.com/wiki/Stack%20Manifest} 
 39  """ 
 40   
 41  import sys 
 42  import os 
 43  import getopt 
 44   
 45  import roslib.exceptions 
 46  import roslib.packages 
 47  import roslib.rosenv 
 48   
 49  STACK_FILE = 'stack.xml' 
 50   
 51  import roslib.manifestlib 
 52  # re-export symbols so that external code does not have to import manifestlib as well 
 53  from roslib.manifestlib import ManifestException, StackDepend 
 54   
 55 -class StackManifest(roslib.manifestlib._Manifest): 
 56      """ 
 57      Object representation of a ROS manifest file 
 58      """ 
 59      __slots__ = [] 
 60 -    def __init__(self): 
 61          """ 
 62          Create an empty stack manifest instance. 
 63          """ 
 64          super(StackManifest, self).__init__('stack') 
 65           
 66 -def _stack_file_by_dir(stack_dir, required=True): 
 67      """ 
 68      @param stack_dir: path to stack directory 
 69      @type  stack_dir: str 
 70      @param required: require that the directory exist 
 71      @type  required: bool 
 72      @return: path to manifest file of stack 
 73      @rtype: str 
 74      @raise InvalidROSPkgException: if required is True and manifest file cannot be located 
 75      """ 
 76      try: 
 77          p = os.path.join(stack_dir, STACK_FILE) 
 78          if not required and not os.path.exists(p): 
 79              return p 
 80          if not os.path.isfile(p): 
 81              raise roslib.stacks.InvalidROSStackException(""" 
 82  Stack '%(stack_dir)s' is improperly configured: no manifest file is present. 
 83  """%locals()) 
 84          return p 
 85      except roslib.stacks.InvalidROSStackException, e: 
 86          if required: 
 87              raise 
 88   
 89 -def stack_file(stack, required=True): 
 90      """ 
 91      @param stack: stack name 
 92      @type  stack: str 
 93      @param required: require that the directory exist 
 94      @type  required: bool 
 95      @return: path to manifest file of stack 
 96      @rtype:  str 
 97      @raise InvalidROSPkgException: if required is True and manifest file cannot be located 
 98      """ 
 99      d = roslib.stacks.get_stack_dir(stack) 
100      return _stack_file_by_dir(d, required) 
101           
102 -def parse_file(file): 
103      """ 
104      Parse stack.xml file 
105      @param file: stack.xml file path 
106      @param file: str 
107      @return: StackManifest instance 
108      @rtype:  L{StackManifest} 
109      """ 
110      return roslib.manifestlib.parse_file(StackManifest(), file) 
111   
112 -def parse(string, filename='string'): 
113      """ 
114      Parse stack.xml string contents 
115      @param string: stack.xml contents 
116      @type  string: str 
117      @return: StackManifest instance 
118      @rtype:  L{StackManifest} 
119      """ 
120      s = roslib.manifestlib.parse(StackManifest(), string, filename) 
121      #TODO: validate 
122      return s 
123