152 lines
4.2 KiB
Python
152 lines
4.2 KiB
Python
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"""scons.Node.Alias
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Alias nodes.
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This creates a hash of global Aliases (dummy targets).
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"""
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#
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# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 The SCons Foundation
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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__revision__ = "src/engine/SCons/Node/Alias.py issue-2856:2676:d23b7a2f45e8 2012/08/05 15:38:28 garyo"
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import collections
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import SCons.Errors
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import SCons.Node
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import SCons.Util
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class AliasNameSpace(collections.UserDict):
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def Alias(self, name, **kw):
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if isinstance(name, SCons.Node.Alias.Alias):
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return name
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try:
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a = self[name]
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except KeyError:
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a = SCons.Node.Alias.Alias(name, **kw)
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self[name] = a
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return a
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def lookup(self, name, **kw):
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try:
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return self[name]
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except KeyError:
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return None
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class AliasNodeInfo(SCons.Node.NodeInfoBase):
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current_version_id = 1
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field_list = ['csig']
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def str_to_node(self, s):
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return default_ans.Alias(s)
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class AliasBuildInfo(SCons.Node.BuildInfoBase):
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current_version_id = 1
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class Alias(SCons.Node.Node):
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NodeInfo = AliasNodeInfo
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BuildInfo = AliasBuildInfo
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def __init__(self, name):
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SCons.Node.Node.__init__(self)
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self.name = name
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def str_for_display(self):
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return '"' + self.__str__() + '"'
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def __str__(self):
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return self.name
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def make_ready(self):
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self.get_csig()
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really_build = SCons.Node.Node.build
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is_up_to_date = SCons.Node.Node.children_are_up_to_date
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def is_under(self, dir):
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# Make Alias nodes get built regardless of
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# what directory scons was run from. Alias nodes
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# are outside the filesystem:
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return 1
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def get_contents(self):
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"""The contents of an alias is the concatenation
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of the content signatures of all its sources."""
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childsigs = [n.get_csig() for n in self.children()]
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return ''.join(childsigs)
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def sconsign(self):
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"""An Alias is not recorded in .sconsign files"""
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pass
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#
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#
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#
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def changed_since_last_build(self, target, prev_ni):
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cur_csig = self.get_csig()
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try:
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return cur_csig != prev_ni.csig
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except AttributeError:
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return 1
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def build(self):
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"""A "builder" for aliases."""
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pass
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def convert(self):
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try: del self.builder
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except AttributeError: pass
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self.reset_executor()
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self.build = self.really_build
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def get_csig(self):
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"""
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Generate a node's content signature, the digested signature
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of its content.
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node - the node
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cache - alternate node to use for the signature cache
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returns - the content signature
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"""
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try:
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return self.ninfo.csig
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except AttributeError:
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pass
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contents = self.get_contents()
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csig = SCons.Util.MD5signature(contents)
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self.get_ninfo().csig = csig
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return csig
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default_ans = AliasNameSpace()
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SCons.Node.arg2nodes_lookups.append(default_ans.lookup)
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# Local Variables:
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# tab-width:4
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# indent-tabs-mode:nil
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# End:
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# vim: set expandtab tabstop=4 shiftwidth=4:
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