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"""scons.Node.Alias
Alias nodes.
This creates a hash of global Aliases (dummy targets).
"""
#
# Copyright (c) 2001, 2002 Steven Knight
#
# 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__ = "__FILE__ __REVISION__ __DATE__ __USER__"
import UserDict
import SCons.Errors
import SCons.Node
import SCons.Util
class AliasNameSpace(UserDict.UserDict):
def Alias(self, name):
if self.has_key(name):
raise SCons.Errors.UserError
self[name] = SCons.Node.Alias.Alias(name)
return self[name]
def lookup(self, name):
try:
return self[name]
except KeyError:
return None
class Alias(SCons.Node.Node):
def __init__(self, name):
SCons.Node.Node.__init__(self)
self.name = name
def __str__(self):
return self.name
def build(self):
"""A "builder" for aliases."""
pass
def set_bsig(self, bsig):
"""An alias has no signature."""
self.bsig = None
def set_csig(self, csig):
"""An alias has no signature."""
self.csig = None
def current(self, calc):
"""If all of our children were up-to-date, then this
Alias was up-to-date, too."""
# Allow the children to calculate their signatures.
calc.bsig(self)
state = 0
for kid in self.children(None):
s = kid.get_state()
if s and (not state or s > state):
state = s
if state == 0 or state == SCons.Node.up_to_date:
return 1
else:
return 0
def sconsign(self):
"""An Alias is not recorded in .sconsign files"""
pass
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
default_ans = AliasNameSpace()
SCons.Node.arg2nodes_lookups.append(default_ans.lookup)
|
