Package SCons :: Package Node :: Module Alias
[hide private]
[frames] | no frames]

Source Code for Module SCons.Node.Alias

  1   
  2  """scons.Node.Alias 
  3   
  4  Alias nodes. 
  5   
  6  This creates a hash of global Aliases (dummy targets). 
  7   
  8  """ 
  9   
 10  # 
 11  # Copyright (c) 2001 - 2014 The SCons Foundation 
 12  # 
 13  # Permission is hereby granted, free of charge, to any person obtaining 
 14  # a copy of this software and associated documentation files (the 
 15  # "Software"), to deal in the Software without restriction, including 
 16  # without limitation the rights to use, copy, modify, merge, publish, 
 17  # distribute, sublicense, and/or sell copies of the Software, and to 
 18  # permit persons to whom the Software is furnished to do so, subject to 
 19  # the following conditions: 
 20  # 
 21  # The above copyright notice and this permission notice shall be included 
 22  # in all copies or substantial portions of the Software. 
 23  # 
 24  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
 25  # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
 26  # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 27  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
 28  # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
 29  # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
 30  # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 31  # 
 32   
 33  __revision__ = "src/engine/SCons/Node/Alias.py  2014/07/05 09:42:21 garyo" 
 34   
 35  import collections 
 36   
 37  import SCons.Errors 
 38  import SCons.Node 
 39  import SCons.Util 
 40   
41 -class AliasNameSpace(collections.UserDict):
42 - def Alias(self, name, **kw):
43 if isinstance(name, SCons.Node.Alias.Alias): 44 return name 45 try: 46 a = self[name] 47 except KeyError: 48 a = SCons.Node.Alias.Alias(name, **kw) 49 self[name] = a 50 return a
51
52 - def lookup(self, name, **kw):
53 try: 54 return self[name] 55 except KeyError: 56 return None
57
58 -class AliasNodeInfo(SCons.Node.NodeInfoBase):
59 current_version_id = 1 60 field_list = ['csig']
61 - def str_to_node(self, s):
62 return default_ans.Alias(s)
63
64 -class AliasBuildInfo(SCons.Node.BuildInfoBase):
65 current_version_id = 1
66
67 -class Alias(SCons.Node.Node):
68 69 NodeInfo = AliasNodeInfo 70 BuildInfo = AliasBuildInfo 71
72 - def __init__(self, name):
73 SCons.Node.Node.__init__(self) 74 self.name = name
75
76 - def str_for_display(self):
77 return '"' + self.__str__() + '"'
78
79 - def __str__(self):
80 return self.name
81
82 - def make_ready(self):
83 self.get_csig()
84 85 really_build = SCons.Node.Node.build 86 is_up_to_date = SCons.Node.Node.children_are_up_to_date 87
88 - def is_under(self, dir):
89 # Make Alias nodes get built regardless of 90 # what directory scons was run from. Alias nodes 91 # are outside the filesystem: 92 return 1
93
94 - def get_contents(self):
95 """The contents of an alias is the concatenation 96 of the content signatures of all its sources.""" 97 childsigs = [n.get_csig() for n in self.children()] 98 return ''.join(childsigs)
99
100 - def sconsign(self):
101 """An Alias is not recorded in .sconsign files""" 102 pass
103 104 # 105 # 106 # 107
108 - def changed_since_last_build(self, target, prev_ni):
109 cur_csig = self.get_csig() 110 try: 111 return cur_csig != prev_ni.csig 112 except AttributeError: 113 return 1
114
115 - def build(self):
116 """A "builder" for aliases.""" 117 pass
118
119 - def convert(self):
120 try: del self.builder 121 except AttributeError: pass 122 self.reset_executor() 123 self.build = self.really_build
124
125 - def get_csig(self):
126 """ 127 Generate a node's content signature, the digested signature 128 of its content. 129 130 node - the node 131 cache - alternate node to use for the signature cache 132 returns - the content signature 133 """ 134 try: 135 return self.ninfo.csig 136 except AttributeError: 137 pass 138 139 contents = self.get_contents() 140 csig = SCons.Util.MD5signature(contents) 141 self.get_ninfo().csig = csig 142 return csig
143 144 default_ans = AliasNameSpace() 145 146 SCons.Node.arg2nodes_lookups.append(default_ans.lookup) 147 148 # Local Variables: 149 # tab-width:4 150 # indent-tabs-mode:nil 151 # End: 152 # vim: set expandtab tabstop=4 shiftwidth=4: 153