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|
"""SCons.Environment
XXX
"""
#
# Copyright (c) 2001 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__ __DEVELOPER__"
import copy
import re
import types
import SCons.Util
import SCons.Builder
from SCons.Errors import UserError
from UserList import UserList
def Command():
pass # XXX
def Install():
pass # XXX
def InstallAs():
pass # XXX
def _deepcopy_atomic(x, memo):
return x
copy._deepcopy_dispatch[types.ModuleType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.ClassType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FunctionType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.MethodType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.TracebackType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FrameType] = _deepcopy_atomic
copy._deepcopy_dispatch[types.FileType] = _deepcopy_atomic
class Environment:
"""Base class for construction Environments. These are
the primary objects used to communicate dependency and
construction information to the build engine.
Keyword arguments supplied when the construction Environment
is created are construction variables used to initialize the
Environment.
"""
# See the documentation for the __autogenerate() method
# for an explanation of this variable...
AUTO_GEN_VARS = ( ( '_LIBFLAGS',
'LIBS',
'LIBLINKPREFIX',
'LIBLINKSUFFIX' ),
( '_LIBDIRFLAGS',
'LIBPATH',
'LIBDIRPREFIX',
'LIBDIRSUFFIX' ),
( '_INCFLAGS',
'CPPPATH',
'INCPREFIX',
'INCSUFFIX' ) )
def __init__(self, **kw):
import SCons.Defaults
self._dict = copy.deepcopy(SCons.Defaults.ConstructionEnvironment)
if kw.has_key('BUILDERS') and type(kw['BUILDERS']) != type([]):
kw['BUILDERS'] = [kw['BUILDERS']]
if kw.has_key('SCANNERS') and type(kw['SCANNERS']) != type([]):
kw['SCANNERS'] = [kw['SCANNERS']]
self._dict.update(copy.deepcopy(kw))
self.__autogenerate()
class BuilderWrapper:
"""Wrapper class that allows an environment to
be associated with a Builder at instantiation.
"""
def __init__(self, env, builder):
self.env = env
self.builder = builder
def __call__(self, target = None, source = None):
return self.builder(self.env, target, source)
# This allows a Builder to be executed directly
# through the Environment to which it's attached.
# In practice, we shouldn't need this, because
# builders actually get executed through a Node.
# But we do have a unit test for this, and can't
# yet rule out that it would be useful in the
# future, so leave it for now.
def execute(self, **kw):
kw['env'] = self
apply(self.builder.execute, (), kw)
for b in self._dict['BUILDERS']:
setattr(self, b.name, BuilderWrapper(self, b))
for s in self._dict['SCANNERS']:
setattr(self, s.name, s)
def __autogenerate(self):
"""Autogenerate the "interpolated" environment variables.
We read a static structure that tells us how. AUTO_GEN_VARS
is a tuple of tuples. Each inner tuple has four elements,
each strings referring to an environment variable, and describing
how to autogenerate a particular variable. The elements are:
0 - The variable to generate
1 - The "source" variable, usually a list
2 - The "prefix" variable
3 - The "suffix" variable
The autogenerated variable is a list, consisting of every
element of the source list, or a single element if the source
is a string, with the prefix and suffix
concatenated."""
for strVarAuto, strSrc, strPref, strSuff, in self.AUTO_GEN_VARS:
if self._dict.has_key(strSrc):
src_var = self._dict[strSrc]
if type(src_var) is types.ListType or \
isinstance(src_var, UserList):
src_var = map(str, src_var)
else:
src_var = [ str(src_var), ]
else:
src_var = []
try:
prefix = str(self._dict[strPref])
except KeyError:
prefix=''
try:
suffix = str(self._dict[strSuff])
except KeyError:
suffix =''
self._dict[strVarAuto] = map(lambda x, suff=suffix, pref=prefix: \
pref + str(x) + suff,
src_var)
def __cmp__(self, other):
return cmp(self._dict, other._dict)
def Builders(self):
pass # XXX
def Copy(self, **kw):
"""Return a copy of a construction Environment. The
copy is like a Python "deep copy"--that is, independent
copies are made recursively of each objects--except that
a reference is copied when an object is not deep-copyable
(like a function). There are no references to any mutable
objects in the original Environment.
"""
clone = copy.deepcopy(self)
apply(clone.Update, (), kw)
return clone
def Scanners(self):
pass # XXX
def Update(self, **kw):
"""Update an existing construction Environment with new
construction variables and/or values.
"""
self._dict.update(copy.deepcopy(kw))
self.__autogenerate()
def Depends(self, target, dependency):
"""Explicity specify that 'target's depend on 'dependency'."""
tlist = SCons.Util.scons_str2nodes(target)
dlist = SCons.Util.scons_str2nodes(dependency)
for t in tlist:
t.add_dependency(dlist)
if len(tlist) == 1:
tlist = tlist[0]
return tlist
def Dictionary(self, *args):
if not args:
return self._dict
dlist = map(lambda x, s=self: s._dict[x], args)
if len(dlist) == 1:
dlist = dlist[0]
return dlist
def Command(self, target, source, action):
"""Builds the supplied target files from the supplied
source files using the supplied action. Action may
be any type that the Builder constructor will accept
for an action."""
bld = SCons.Builder.Builder(name="Command", action=action)
return bld(self, target, source)
def subst(self, string):
"""Recursively interpolates construction variables from the
Environment into the specified string, returning the expanded
result. Construction variables are specified by a $ prefix
in the string and begin with an initial underscore or
alphabetic character followed by any number of underscores
or alphanumeric characters. The construction variable names
may be surrounded by curly braces to separate the name from
trailing characters.
"""
return SCons.Util.scons_subst(string, self._dict, {})
def get_scanner(self, skey):
"""Find the appropriate scanner given a key (usually a file suffix).
Does a linear search. Could be sped up by creating a dictionary if
this proves too slow.
"""
if self._dict['SCANNERS']:
for scanner in self._dict['SCANNERS']:
if skey in scanner.skeys:
return scanner
return None
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