152 lines
4.2 KiB
Python
152 lines
4.2 KiB
Python
|
|
"""scons.Node.Alias
|
|
|
|
Alias nodes.
|
|
|
|
This creates a hash of global Aliases (dummy targets).
|
|
|
|
"""
|
|
|
|
#
|
|
# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 The SCons Foundation
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining
|
|
# a copy of this software and associated documentation files (the
|
|
# "Software"), to deal in the Software without restriction, including
|
|
# without limitation the rights to use, copy, modify, merge, publish,
|
|
# distribute, sublicense, and/or sell copies of the Software, and to
|
|
# permit persons to whom the Software is furnished to do so, subject to
|
|
# the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be included
|
|
# in all copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
|
|
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
|
|
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
#
|
|
|
|
__revision__ = "src/engine/SCons/Node/Alias.py 2014/03/02 14:18:15 garyo"
|
|
|
|
import collections
|
|
|
|
import SCons.Errors
|
|
import SCons.Node
|
|
import SCons.Util
|
|
|
|
class AliasNameSpace(collections.UserDict):
|
|
def Alias(self, name, **kw):
|
|
if isinstance(name, SCons.Node.Alias.Alias):
|
|
return name
|
|
try:
|
|
a = self[name]
|
|
except KeyError:
|
|
a = SCons.Node.Alias.Alias(name, **kw)
|
|
self[name] = a
|
|
return a
|
|
|
|
def lookup(self, name, **kw):
|
|
try:
|
|
return self[name]
|
|
except KeyError:
|
|
return None
|
|
|
|
class AliasNodeInfo(SCons.Node.NodeInfoBase):
|
|
current_version_id = 1
|
|
field_list = ['csig']
|
|
def str_to_node(self, s):
|
|
return default_ans.Alias(s)
|
|
|
|
class AliasBuildInfo(SCons.Node.BuildInfoBase):
|
|
current_version_id = 1
|
|
|
|
class Alias(SCons.Node.Node):
|
|
|
|
NodeInfo = AliasNodeInfo
|
|
BuildInfo = AliasBuildInfo
|
|
|
|
def __init__(self, name):
|
|
SCons.Node.Node.__init__(self)
|
|
self.name = name
|
|
|
|
def str_for_display(self):
|
|
return '"' + self.__str__() + '"'
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
def make_ready(self):
|
|
self.get_csig()
|
|
|
|
really_build = SCons.Node.Node.build
|
|
is_up_to_date = SCons.Node.Node.children_are_up_to_date
|
|
|
|
def is_under(self, dir):
|
|
# Make Alias nodes get built regardless of
|
|
# what directory scons was run from. Alias nodes
|
|
# are outside the filesystem:
|
|
return 1
|
|
|
|
def get_contents(self):
|
|
"""The contents of an alias is the concatenation
|
|
of the content signatures of all its sources."""
|
|
childsigs = [n.get_csig() for n in self.children()]
|
|
return ''.join(childsigs)
|
|
|
|
def sconsign(self):
|
|
"""An Alias is not recorded in .sconsign files"""
|
|
pass
|
|
|
|
#
|
|
#
|
|
#
|
|
|
|
def changed_since_last_build(self, target, prev_ni):
|
|
cur_csig = self.get_csig()
|
|
try:
|
|
return cur_csig != prev_ni.csig
|
|
except AttributeError:
|
|
return 1
|
|
|
|
def build(self):
|
|
"""A "builder" for aliases."""
|
|
pass
|
|
|
|
def convert(self):
|
|
try: del self.builder
|
|
except AttributeError: pass
|
|
self.reset_executor()
|
|
self.build = self.really_build
|
|
|
|
def get_csig(self):
|
|
"""
|
|
Generate a node's content signature, the digested signature
|
|
of its content.
|
|
|
|
node - the node
|
|
cache - alternate node to use for the signature cache
|
|
returns - the content signature
|
|
"""
|
|
try:
|
|
return self.ninfo.csig
|
|
except AttributeError:
|
|
pass
|
|
|
|
contents = self.get_contents()
|
|
csig = SCons.Util.MD5signature(contents)
|
|
self.get_ninfo().csig = csig
|
|
return csig
|
|
|
|
default_ans = AliasNameSpace()
|
|
|
|
SCons.Node.arg2nodes_lookups.append(default_ans.lookup)
|
|
|
|
# Local Variables:
|
|
# tab-width:4
|
|
# indent-tabs-mode:nil
|
|
# End:
|
|
# vim: set expandtab tabstop=4 shiftwidth=4:
|