--- /dev/null
+"""SCons.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
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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/Environment.py 3842 2008/12/20 22:59:52 scons"
+
+
+import copy
+import os
+import sys
+import re
+import shlex
+import string
+from UserDict import UserDict
+
+import SCons.Action
+import SCons.Builder
+from SCons.Debug import logInstanceCreation
+import SCons.Defaults
+import SCons.Errors
+import SCons.Memoize
+import SCons.Node
+import SCons.Node.Alias
+import SCons.Node.FS
+import SCons.Node.Python
+import SCons.Platform
+import SCons.SConsign
+import SCons.Subst
+import SCons.Tool
+import SCons.Util
+import SCons.Warnings
+
+class _Null:
+ pass
+
+_null = _Null
+
+_warn_copy_deprecated = True
+_warn_source_signatures_deprecated = True
+_warn_target_signatures_deprecated = True
+
+CleanTargets = {}
+CalculatorArgs = {}
+
+semi_deepcopy = SCons.Util.semi_deepcopy
+
+# Pull UserError into the global name space for the benefit of
+# Environment().SourceSignatures(), which has some import statements
+# which seem to mess up its ability to reference SCons directly.
+UserError = SCons.Errors.UserError
+
+def alias_builder(env, target, source):
+ pass
+
+AliasBuilder = SCons.Builder.Builder(action = alias_builder,
+ target_factory = SCons.Node.Alias.default_ans.Alias,
+ source_factory = SCons.Node.FS.Entry,
+ multi = 1,
+ is_explicit = None,
+ name='AliasBuilder')
+
+def apply_tools(env, tools, toolpath):
+ # Store the toolpath in the Environment.
+ if toolpath is not None:
+ env['toolpath'] = toolpath
+
+ if not tools:
+ return
+ # Filter out null tools from the list.
+ for tool in filter(None, tools):
+ if SCons.Util.is_List(tool) or type(tool)==type(()):
+ toolname = tool[0]
+ toolargs = tool[1] # should be a dict of kw args
+ tool = apply(env.Tool, [toolname], toolargs)
+ else:
+ env.Tool(tool)
+
+# These names are (or will be) controlled by SCons; users should never
+# set or override them. This warning can optionally be turned off,
+# but scons will still ignore the illegal variable names even if it's off.
+reserved_construction_var_names = [
+ 'SOURCE',
+ 'SOURCES',
+ 'TARGET',
+ 'TARGETS',
+]
+
+future_reserved_construction_var_names = [
+ 'CHANGED_SOURCES',
+ 'CHANGED_TARGETS',
+ 'UNCHANGED_SOURCES',
+ 'UNCHANGED_TARGETS',
+]
+
+def copy_non_reserved_keywords(dict):
+ result = semi_deepcopy(dict)
+ for k in result.keys():
+ if k in reserved_construction_var_names:
+ msg = "Ignoring attempt to set reserved variable `$%s'"
+ SCons.Warnings.warn(SCons.Warnings.ReservedVariableWarning, msg % k)
+ del result[k]
+ return result
+
+def _set_reserved(env, key, value):
+ msg = "Ignoring attempt to set reserved variable `$%s'"
+ SCons.Warnings.warn(SCons.Warnings.ReservedVariableWarning, msg % key)
+
+def _set_future_reserved(env, key, value):
+ env._dict[key] = value
+ msg = "`$%s' will be reserved in a future release and setting it will become ignored"
+ SCons.Warnings.warn(SCons.Warnings.FutureReservedVariableWarning, msg % key)
+
+def _set_BUILDERS(env, key, value):
+ try:
+ bd = env._dict[key]
+ for k in bd.keys():
+ del bd[k]
+ except KeyError:
+ bd = BuilderDict(kwbd, env)
+ env._dict[key] = bd
+ bd.update(value)
+
+def _del_SCANNERS(env, key):
+ del env._dict[key]
+ env.scanner_map_delete()
+
+def _set_SCANNERS(env, key, value):
+ env._dict[key] = value
+ env.scanner_map_delete()
+
+def _delete_duplicates(l, keep_last):
+ """Delete duplicates from a sequence, keeping the first or last."""
+ seen={}
+ result=[]
+ if keep_last: # reverse in & out, then keep first
+ l.reverse()
+ for i in l:
+ try:
+ if not seen.has_key(i):
+ result.append(i)
+ seen[i]=1
+ except TypeError:
+ # probably unhashable. Just keep it.
+ result.append(i)
+ if keep_last:
+ result.reverse()
+ return result
+
+
+
+# The following is partly based on code in a comment added by Peter
+# Shannon at the following page (there called the "transplant" class):
+#
+# ASPN : Python Cookbook : Dynamically added methods to a class
+# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81732
+#
+# We had independently been using the idiom as BuilderWrapper, but
+# factoring out the common parts into this base class, and making
+# BuilderWrapper a subclass that overrides __call__() to enforce specific
+# Builder calling conventions, simplified some of our higher-layer code.
+
+class MethodWrapper:
+ """
+ A generic Wrapper class that associates a method (which can
+ actually be any callable) with an object. As part of creating this
+ MethodWrapper object an attribute with the specified (by default,
+ the name of the supplied method) is added to the underlying object.
+ When that new "method" is called, our __call__() method adds the
+ object as the first argument, simulating the Python behavior of
+ supplying "self" on method calls.
+
+ We hang on to the name by which the method was added to the underlying
+ base class so that we can provide a method to "clone" ourselves onto
+ a new underlying object being copied (without which we wouldn't need
+ to save that info).
+ """
+ def __init__(self, object, method, name=None):
+ if name is None:
+ name = method.__name__
+ self.object = object
+ self.method = method
+ self.name = name
+ setattr(self.object, name, self)
+
+ def __call__(self, *args, **kwargs):
+ nargs = (self.object,) + args
+ return apply(self.method, nargs, kwargs)
+
+ def clone(self, new_object):
+ """
+ Returns an object that re-binds the underlying "method" to
+ the specified new object.
+ """
+ return self.__class__(new_object, self.method, self.name)
+
+class BuilderWrapper(MethodWrapper):
+ """
+ A MethodWrapper subclass that that associates an environment with
+ a Builder.
+
+ This mainly exists to wrap the __call__() function so that all calls
+ to Builders can have their argument lists massaged in the same way
+ (treat a lone argument as the source, treat two arguments as target
+ then source, make sure both target and source are lists) without
+ having to have cut-and-paste code to do it.
+
+ As a bit of obsessive backwards compatibility, we also intercept
+ attempts to get or set the "env" or "builder" attributes, which were
+ the names we used before we put the common functionality into the
+ MethodWrapper base class. We'll keep this around for a while in case
+ people shipped Tool modules that reached into the wrapper (like the
+ Tool/qt.py module does, or did). There shouldn't be a lot attribute
+ fetching or setting on these, so a little extra work shouldn't hurt.
+ """
+ def __call__(self, target=None, source=_null, *args, **kw):
+ if source is _null:
+ source = target
+ target = None
+ if not target is None and not SCons.Util.is_List(target):
+ target = [target]
+ if not source is None and not SCons.Util.is_List(source):
+ source = [source]
+ return apply(MethodWrapper.__call__, (self, target, source) + args, kw)
+
+ def __repr__(self):
+ return '<BuilderWrapper %s>' % repr(self.name)
+
+ def __str__(self):
+ return self.__repr__()
+
+ def __getattr__(self, name):
+ if name == 'env':
+ return self.object
+ elif name == 'builder':
+ return self.method
+ else:
+ raise AttributeError, name
+
+ def __setattr__(self, name, value):
+ if name == 'env':
+ self.object = value
+ elif name == 'builder':
+ self.method = value
+ else:
+ self.__dict__[name] = value
+
+ # 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.env
+ # apply(self.builder.execute, (), kw)
+
+class BuilderDict(UserDict):
+ """This is a dictionary-like class used by an Environment to hold
+ the Builders. We need to do this because every time someone changes
+ the Builders in the Environment's BUILDERS dictionary, we must
+ update the Environment's attributes."""
+ def __init__(self, dict, env):
+ # Set self.env before calling the superclass initialization,
+ # because it will end up calling our other methods, which will
+ # need to point the values in this dictionary to self.env.
+ self.env = env
+ UserDict.__init__(self, dict)
+
+ def __semi_deepcopy__(self):
+ return self.__class__(self.data, self.env)
+
+ def __setitem__(self, item, val):
+ try:
+ method = getattr(self.env, item).method
+ except AttributeError:
+ pass
+ else:
+ self.env.RemoveMethod(method)
+ UserDict.__setitem__(self, item, val)
+ BuilderWrapper(self.env, val, item)
+
+ def __delitem__(self, item):
+ UserDict.__delitem__(self, item)
+ delattr(self.env, item)
+
+ def update(self, dict):
+ for i, v in dict.items():
+ self.__setitem__(i, v)
+
+
+
+_is_valid_var = re.compile(r'[_a-zA-Z]\w*$')
+
+def is_valid_construction_var(varstr):
+ """Return if the specified string is a legitimate construction
+ variable.
+ """
+ return _is_valid_var.match(varstr)
+
+
+
+class SubstitutionEnvironment:
+ """Base class for different flavors of construction environments.
+
+ This class contains a minimal set of methods that handle contruction
+ variable expansion and conversion of strings to Nodes, which may or
+ may not be actually useful as a stand-alone class. Which methods
+ ended up in this class is pretty arbitrary right now. They're
+ basically the ones which we've empirically determined are common to
+ the different construction environment subclasses, and most of the
+ others that use or touch the underlying dictionary of construction
+ variables.
+
+ Eventually, this class should contain all the methods that we
+ determine are necessary for a "minimal" interface to the build engine.
+ A full "native Python" SCons environment has gotten pretty heavyweight
+ with all of the methods and Tools and construction variables we've
+ jammed in there, so it would be nice to have a lighter weight
+ alternative for interfaces that don't need all of the bells and
+ whistles. (At some point, we'll also probably rename this class
+ "Base," since that more reflects what we want this class to become,
+ but because we've released comments that tell people to subclass
+ Environment.Base to create their own flavors of construction
+ environment, we'll save that for a future refactoring when this
+ class actually becomes useful.)
+ """
+
+ if SCons.Memoize.use_memoizer:
+ __metaclass__ = SCons.Memoize.Memoized_Metaclass
+
+ def __init__(self, **kw):
+ """Initialization of an underlying SubstitutionEnvironment class.
+ """
+ if __debug__: logInstanceCreation(self, 'Environment.SubstitutionEnvironment')
+ self.fs = SCons.Node.FS.get_default_fs()
+ self.ans = SCons.Node.Alias.default_ans
+ self.lookup_list = SCons.Node.arg2nodes_lookups
+ self._dict = kw.copy()
+ self._init_special()
+ self.added_methods = []
+ #self._memo = {}
+
+ def _init_special(self):
+ """Initial the dispatch tables for special handling of
+ special construction variables."""
+ self._special_del = {}
+ self._special_del['SCANNERS'] = _del_SCANNERS
+
+ self._special_set = {}
+ for key in reserved_construction_var_names:
+ self._special_set[key] = _set_reserved
+ for key in future_reserved_construction_var_names:
+ self._special_set[key] = _set_future_reserved
+ self._special_set['BUILDERS'] = _set_BUILDERS
+ self._special_set['SCANNERS'] = _set_SCANNERS
+
+ # Freeze the keys of self._special_set in a list for use by
+ # methods that need to check. (Empirically, list scanning has
+ # gotten better than dict.has_key() in Python 2.5.)
+ self._special_set_keys = self._special_set.keys()
+
+ def __cmp__(self, other):
+ return cmp(self._dict, other._dict)
+
+ def __delitem__(self, key):
+ special = self._special_del.get(key)
+ if special:
+ special(self, key)
+ else:
+ del self._dict[key]
+
+ def __getitem__(self, key):
+ return self._dict[key]
+
+ def __setitem__(self, key, value):
+ # This is heavily used. This implementation is the best we have
+ # according to the timings in bench/env.__setitem__.py.
+ #
+ # The "key in self._special_set_keys" test here seems to perform
+ # pretty well for the number of keys we have. A hard-coded
+ # list works a little better in Python 2.5, but that has the
+ # disadvantage of maybe getting out of sync if we ever add more
+ # variable names. Using self._special_set.has_key() works a
+ # little better in Python 2.4, but is worse then this test.
+ # So right now it seems like a good trade-off, but feel free to
+ # revisit this with bench/env.__setitem__.py as needed (and
+ # as newer versions of Python come out).
+ if key in self._special_set_keys:
+ self._special_set[key](self, key, value)
+ else:
+ # If we already have the entry, then it's obviously a valid
+ # key and we don't need to check. If we do check, using a
+ # global, pre-compiled regular expression directly is more
+ # efficient than calling another function or a method.
+ if not self._dict.has_key(key) \
+ and not _is_valid_var.match(key):
+ raise SCons.Errors.UserError, "Illegal construction variable `%s'" % key
+ self._dict[key] = value
+
+ def get(self, key, default=None):
+ "Emulates the get() method of dictionaries."""
+ return self._dict.get(key, default)
+
+ def has_key(self, key):
+ return self._dict.has_key(key)
+
+ def __contains__(self, key):
+ return self._dict.__contains__(key)
+
+ def items(self):
+ return self._dict.items()
+
+ def arg2nodes(self, args, node_factory=_null, lookup_list=_null, **kw):
+ if node_factory is _null:
+ node_factory = self.fs.File
+ if lookup_list is _null:
+ lookup_list = self.lookup_list
+
+ if not args:
+ return []
+
+ args = SCons.Util.flatten(args)
+
+ nodes = []
+ for v in args:
+ if SCons.Util.is_String(v):
+ n = None
+ for l in lookup_list:
+ n = l(v)
+ if not n is None:
+ break
+ if not n is None:
+ if SCons.Util.is_String(n):
+ # n = self.subst(n, raw=1, **kw)
+ kw['raw'] = 1
+ n = apply(self.subst, (n,), kw)
+ if node_factory:
+ n = node_factory(n)
+ if SCons.Util.is_List(n):
+ nodes.extend(n)
+ else:
+ nodes.append(n)
+ elif node_factory:
+ # v = node_factory(self.subst(v, raw=1, **kw))
+ kw['raw'] = 1
+ v = node_factory(apply(self.subst, (v,), kw))
+ if SCons.Util.is_List(v):
+ nodes.extend(v)
+ else:
+ nodes.append(v)
+ else:
+ nodes.append(v)
+
+ return nodes
+
+ def gvars(self):
+ return self._dict
+
+ def lvars(self):
+ return {}
+
+ def subst(self, string, raw=0, target=None, source=None, conv=None):
+ """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.
+ """
+ gvars = self.gvars()
+ lvars = self.lvars()
+ lvars['__env__'] = self
+ return SCons.Subst.scons_subst(string, self, raw, target, source, gvars, lvars, conv)
+
+ def subst_kw(self, kw, raw=0, target=None, source=None):
+ nkw = {}
+ for k, v in kw.items():
+ k = self.subst(k, raw, target, source)
+ if SCons.Util.is_String(v):
+ v = self.subst(v, raw, target, source)
+ nkw[k] = v
+ return nkw
+
+ def subst_list(self, string, raw=0, target=None, source=None, conv=None):
+ """Calls through to SCons.Subst.scons_subst_list(). See
+ the documentation for that function."""
+ gvars = self.gvars()
+ lvars = self.lvars()
+ lvars['__env__'] = self
+ return SCons.Subst.scons_subst_list(string, self, raw, target, source, gvars, lvars, conv)
+
+ def subst_path(self, path, target=None, source=None):
+ """Substitute a path list, turning EntryProxies into Nodes
+ and leaving Nodes (and other objects) as-is."""
+
+ if not SCons.Util.is_List(path):
+ path = [path]
+
+ def s(obj):
+ """This is the "string conversion" routine that we have our
+ substitutions use to return Nodes, not strings. This relies
+ on the fact that an EntryProxy object has a get() method that
+ returns the underlying Node that it wraps, which is a bit of
+ architectural dependence that we might need to break or modify
+ in the future in response to additional requirements."""
+ try:
+ get = obj.get
+ except AttributeError:
+ obj = SCons.Util.to_String_for_subst(obj)
+ else:
+ obj = get()
+ return obj
+
+ r = []
+ for p in path:
+ if SCons.Util.is_String(p):
+ p = self.subst(p, target=target, source=source, conv=s)
+ if SCons.Util.is_List(p):
+ if len(p) == 1:
+ p = p[0]
+ else:
+ # We have an object plus a string, or multiple
+ # objects that we need to smush together. No choice
+ # but to make them into a string.
+ p = string.join(map(SCons.Util.to_String_for_subst, p), '')
+ else:
+ p = s(p)
+ r.append(p)
+ return r
+
+ subst_target_source = subst
+
+ def backtick(self, command):
+ import subprocess
+ # common arguments
+ kw = { 'stdin' : 'devnull',
+ 'stdout' : subprocess.PIPE,
+ 'stderr' : subprocess.PIPE,
+ 'universal_newlines' : True,
+ }
+ # if the command is a list, assume it's been quoted
+ # othewise force a shell
+ if not SCons.Util.is_List(command): kw['shell'] = True
+ # run constructed command
+ #TODO(1.5) p = SCons.Action._subproc(self, command, **kw)
+ p = apply(SCons.Action._subproc, (self, command), kw)
+ out,err = p.communicate()
+ status = p.wait()
+ if err:
+ sys.stderr.write(err)
+ if status:
+ raise OSError("'%s' exited %d" % (command, status))
+ return out
+
+ def AddMethod(self, function, name=None):
+ """
+ Adds the specified function as a method of this construction
+ environment with the specified name. If the name is omitted,
+ the default name is the name of the function itself.
+ """
+ method = MethodWrapper(self, function, name)
+ self.added_methods.append(method)
+
+ def RemoveMethod(self, function):
+ """
+ Removes the specified function's MethodWrapper from the
+ added_methods list, so we don't re-bind it when making a clone.
+ """
+ is_not_func = lambda dm, f=function: not dm.method is f
+ self.added_methods = filter(is_not_func, self.added_methods)
+
+ def Override(self, overrides):
+ """
+ Produce a modified environment whose variables are overriden by
+ the overrides dictionaries. "overrides" is a dictionary that
+ will override the variables of this environment.
+
+ This function is much more efficient than Clone() or creating
+ a new Environment because it doesn't copy the construction
+ environment dictionary, it just wraps the underlying construction
+ environment, and doesn't even create a wrapper object if there
+ are no overrides.
+ """
+ if not overrides: return self
+ o = copy_non_reserved_keywords(overrides)
+ if not o: return self
+ overrides = {}
+ merges = None
+ for key, value in o.items():
+ if key == 'parse_flags':
+ merges = value
+ else:
+ overrides[key] = SCons.Subst.scons_subst_once(value, self, key)
+ env = OverrideEnvironment(self, overrides)
+ if merges: env.MergeFlags(merges)
+ return env
+
+ def ParseFlags(self, *flags):
+ """
+ Parse the set of flags and return a dict with the flags placed
+ in the appropriate entry. The flags are treated as a typical
+ set of command-line flags for a GNU-like toolchain and used to
+ populate the entries in the dict immediately below. If one of
+ the flag strings begins with a bang (exclamation mark), it is
+ assumed to be a command and the rest of the string is executed;
+ the result of that evaluation is then added to the dict.
+ """
+ dict = {
+ 'ASFLAGS' : SCons.Util.CLVar(''),
+ 'CFLAGS' : SCons.Util.CLVar(''),
+ 'CCFLAGS' : SCons.Util.CLVar(''),
+ 'CPPDEFINES' : [],
+ 'CPPFLAGS' : SCons.Util.CLVar(''),
+ 'CPPPATH' : [],
+ 'FRAMEWORKPATH' : SCons.Util.CLVar(''),
+ 'FRAMEWORKS' : SCons.Util.CLVar(''),
+ 'LIBPATH' : [],
+ 'LIBS' : [],
+ 'LINKFLAGS' : SCons.Util.CLVar(''),
+ 'RPATH' : [],
+ }
+
+ # The use of the "me" parameter to provide our own name for
+ # recursion is an egregious hack to support Python 2.1 and before.
+ def do_parse(arg, me, self = self, dict = dict):
+ # if arg is a sequence, recurse with each element
+ if not arg:
+ return
+
+ if not SCons.Util.is_String(arg):
+ for t in arg: me(t, me)
+ return
+
+ # if arg is a command, execute it
+ if arg[0] == '!':
+ arg = self.backtick(arg[1:])
+
+ # utility function to deal with -D option
+ def append_define(name, dict = dict):
+ t = string.split(name, '=')
+ if len(t) == 1:
+ dict['CPPDEFINES'].append(name)
+ else:
+ dict['CPPDEFINES'].append([t[0], string.join(t[1:], '=')])
+
+ # Loop through the flags and add them to the appropriate option.
+ # This tries to strike a balance between checking for all possible
+ # flags and keeping the logic to a finite size, so it doesn't
+ # check for some that don't occur often. It particular, if the
+ # flag is not known to occur in a config script and there's a way
+ # of passing the flag to the right place (by wrapping it in a -W
+ # flag, for example) we don't check for it. Note that most
+ # preprocessor options are not handled, since unhandled options
+ # are placed in CCFLAGS, so unless the preprocessor is invoked
+ # separately, these flags will still get to the preprocessor.
+ # Other options not currently handled:
+ # -iqoutedir (preprocessor search path)
+ # -u symbol (linker undefined symbol)
+ # -s (linker strip files)
+ # -static* (linker static binding)
+ # -shared* (linker dynamic binding)
+ # -symbolic (linker global binding)
+ # -R dir (deprecated linker rpath)
+ # IBM compilers may also accept -qframeworkdir=foo
+
+ params = shlex.split(arg)
+ append_next_arg_to = None # for multi-word args
+ for arg in params:
+ if append_next_arg_to:
+ if append_next_arg_to == 'CPPDEFINES':
+ append_define(arg)
+ elif append_next_arg_to == '-include':
+ t = ('-include', self.fs.File(arg))
+ dict['CCFLAGS'].append(t)
+ elif append_next_arg_to == '-isysroot':
+ t = ('-isysroot', arg)
+ dict['CCFLAGS'].append(t)
+ dict['LINKFLAGS'].append(t)
+ elif append_next_arg_to == '-arch':
+ t = ('-arch', arg)
+ dict['CCFLAGS'].append(t)
+ dict['LINKFLAGS'].append(t)
+ else:
+ dict[append_next_arg_to].append(arg)
+ append_next_arg_to = None
+ elif not arg[0] in ['-', '+']:
+ dict['LIBS'].append(self.fs.File(arg))
+ elif arg[:2] == '-L':
+ if arg[2:]:
+ dict['LIBPATH'].append(arg[2:])
+ else:
+ append_next_arg_to = 'LIBPATH'
+ elif arg[:2] == '-l':
+ if arg[2:]:
+ dict['LIBS'].append(arg[2:])
+ else:
+ append_next_arg_to = 'LIBS'
+ elif arg[:2] == '-I':
+ if arg[2:]:
+ dict['CPPPATH'].append(arg[2:])
+ else:
+ append_next_arg_to = 'CPPPATH'
+ elif arg[:4] == '-Wa,':
+ dict['ASFLAGS'].append(arg[4:])
+ dict['CCFLAGS'].append(arg)
+ elif arg[:4] == '-Wl,':
+ if arg[:11] == '-Wl,-rpath=':
+ dict['RPATH'].append(arg[11:])
+ elif arg[:7] == '-Wl,-R,':
+ dict['RPATH'].append(arg[7:])
+ elif arg[:6] == '-Wl,-R':
+ dict['RPATH'].append(arg[6:])
+ else:
+ dict['LINKFLAGS'].append(arg)
+ elif arg[:4] == '-Wp,':
+ dict['CPPFLAGS'].append(arg)
+ elif arg[:2] == '-D':
+ if arg[2:]:
+ append_define(arg[2:])
+ else:
+ append_next_arg_to = 'CPPDEFINES'
+ elif arg == '-framework':
+ append_next_arg_to = 'FRAMEWORKS'
+ elif arg[:14] == '-frameworkdir=':
+ dict['FRAMEWORKPATH'].append(arg[14:])
+ elif arg[:2] == '-F':
+ if arg[2:]:
+ dict['FRAMEWORKPATH'].append(arg[2:])
+ else:
+ append_next_arg_to = 'FRAMEWORKPATH'
+ elif arg == '-mno-cygwin':
+ dict['CCFLAGS'].append(arg)
+ dict['LINKFLAGS'].append(arg)
+ elif arg == '-mwindows':
+ dict['LINKFLAGS'].append(arg)
+ elif arg == '-pthread':
+ dict['CCFLAGS'].append(arg)
+ dict['LINKFLAGS'].append(arg)
+ elif arg[:5] == '-std=':
+ dict['CFLAGS'].append(arg) # C only
+ elif arg[0] == '+':
+ dict['CCFLAGS'].append(arg)
+ dict['LINKFLAGS'].append(arg)
+ elif arg in ['-include', '-isysroot', '-arch']:
+ append_next_arg_to = arg
+ else:
+ dict['CCFLAGS'].append(arg)
+
+ for arg in flags:
+ do_parse(arg, do_parse)
+ return dict
+
+ def MergeFlags(self, args, unique=1, dict=None):
+ """
+ Merge the dict in args into the construction variables of this
+ env, or the passed-in dict. If args is not a dict, it is
+ converted into a dict using ParseFlags. If unique is not set,
+ the flags are appended rather than merged.
+ """
+
+ if dict is None:
+ dict = self
+ if not SCons.Util.is_Dict(args):
+ args = self.ParseFlags(args)
+ if not unique:
+ apply(self.Append, (), args)
+ return self
+ for key, value in args.items():
+ if not value:
+ continue
+ try:
+ orig = self[key]
+ except KeyError:
+ orig = value
+ else:
+ if not orig:
+ orig = value
+ elif value:
+ # Add orig and value. The logic here was lifted from
+ # part of env.Append() (see there for a lot of comments
+ # about the order in which things are tried) and is
+ # used mainly to handle coercion of strings to CLVar to
+ # "do the right thing" given (e.g.) an original CCFLAGS
+ # string variable like '-pipe -Wall'.
+ try:
+ orig = orig + value
+ except (KeyError, TypeError):
+ try:
+ add_to_orig = orig.append
+ except AttributeError:
+ value.insert(0, orig)
+ orig = value
+ else:
+ add_to_orig(value)
+ t = []
+ if key[-4:] == 'PATH':
+ ### keep left-most occurence
+ for v in orig:
+ if v not in t:
+ t.append(v)
+ else:
+ ### keep right-most occurence
+ orig.reverse()
+ for v in orig:
+ if v not in t:
+ t.insert(0, v)
+ self[key] = t
+ return self
+
+# def MergeShellPaths(self, args, prepend=1):
+# """
+# Merge the dict in args into the shell environment in env['ENV'].
+# Shell path elements are appended or prepended according to prepend.
+
+# Uses Pre/AppendENVPath, so it always appends or prepends uniquely.
+
+# Example: env.MergeShellPaths({'LIBPATH': '/usr/local/lib'})
+# prepends /usr/local/lib to env['ENV']['LIBPATH'].
+# """
+
+# for pathname, pathval in args.items():
+# if not pathval:
+# continue
+# if prepend:
+# apply(self.PrependENVPath, (pathname, pathval))
+# else:
+# apply(self.AppendENVPath, (pathname, pathval))
+
+
+# Used by the FindSourceFiles() method, below.
+# Stuck here for support of pre-2.2 Python versions.
+def build_source(ss, result):
+ for s in ss:
+ if isinstance(s, SCons.Node.FS.Dir):
+ build_source(s.all_children(), result)
+ elif s.has_builder():
+ build_source(s.sources, result)
+ elif isinstance(s.disambiguate(), SCons.Node.FS.File):
+ result.append(s)
+
+def default_decide_source(dependency, target, prev_ni):
+ f = SCons.Defaults.DefaultEnvironment().decide_source
+ return f(dependency, target, prev_ni)
+
+def default_decide_target(dependency, target, prev_ni):
+ f = SCons.Defaults.DefaultEnvironment().decide_target
+ return f(dependency, target, prev_ni)
+
+def default_copy_from_cache(src, dst):
+ f = SCons.Defaults.DefaultEnvironment().copy_from_cache
+ return f(src, dst)
+
+class Base(SubstitutionEnvironment):
+ """Base class for "real" 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.
+ """
+
+ if SCons.Memoize.use_memoizer:
+ __metaclass__ = SCons.Memoize.Memoized_Metaclass
+
+ memoizer_counters = []
+
+ #######################################################################
+ # This is THE class for interacting with the SCons build engine,
+ # and it contains a lot of stuff, so we're going to try to keep this
+ # a little organized by grouping the methods.
+ #######################################################################
+
+ #######################################################################
+ # Methods that make an Environment act like a dictionary. These have
+ # the expected standard names for Python mapping objects. Note that
+ # we don't actually make an Environment a subclass of UserDict for
+ # performance reasons. Note also that we only supply methods for
+ # dictionary functionality that we actually need and use.
+ #######################################################################
+
+ def __init__(self,
+ platform=None,
+ tools=None,
+ toolpath=None,
+ variables=None,
+ parse_flags = None,
+ **kw):
+ """
+ Initialization of a basic SCons construction environment,
+ including setting up special construction variables like BUILDER,
+ PLATFORM, etc., and searching for and applying available Tools.
+
+ Note that we do *not* call the underlying base class
+ (SubsitutionEnvironment) initialization, because we need to
+ initialize things in a very specific order that doesn't work
+ with the much simpler base class initialization.
+ """
+ if __debug__: logInstanceCreation(self, 'Environment.Base')
+ self._memo = {}
+ self.fs = SCons.Node.FS.get_default_fs()
+ self.ans = SCons.Node.Alias.default_ans
+ self.lookup_list = SCons.Node.arg2nodes_lookups
+ self._dict = semi_deepcopy(SCons.Defaults.ConstructionEnvironment)
+ self._init_special()
+ self.added_methods = []
+
+ # We don't use AddMethod, or define these as methods in this
+ # class, because we *don't* want these functions to be bound
+ # methods. They need to operate independently so that the
+ # settings will work properly regardless of whether a given
+ # target ends up being built with a Base environment or an
+ # OverrideEnvironment or what have you.
+ self.decide_target = default_decide_target
+ self.decide_source = default_decide_source
+
+ self.copy_from_cache = default_copy_from_cache
+
+ self._dict['BUILDERS'] = BuilderDict(self._dict['BUILDERS'], self)
+
+ if platform is None:
+ platform = self._dict.get('PLATFORM', None)
+ if platform is None:
+ platform = SCons.Platform.Platform()
+ if SCons.Util.is_String(platform):
+ platform = SCons.Platform.Platform(platform)
+ self._dict['PLATFORM'] = str(platform)
+ platform(self)
+
+ # Apply the passed-in and customizable variables to the
+ # environment before calling the tools, because they may use
+ # some of them during initialization.
+ if kw.has_key('options'):
+ # Backwards compatibility: they may stll be using the
+ # old "options" keyword.
+ variables = kw['options']
+ del kw['options']
+ apply(self.Replace, (), kw)
+ keys = kw.keys()
+ if variables:
+ keys = keys + variables.keys()
+ variables.Update(self)
+
+ save = {}
+ for k in keys:
+ try:
+ save[k] = self._dict[k]
+ except KeyError:
+ # No value may have been set if they tried to pass in a
+ # reserved variable name like TARGETS.
+ pass
+
+ SCons.Tool.Initializers(self)
+
+ if tools is None:
+ tools = self._dict.get('TOOLS', None)
+ if tools is None:
+ tools = ['default']
+ apply_tools(self, tools, toolpath)
+
+ # Now restore the passed-in and customized variables
+ # to the environment, since the values the user set explicitly
+ # should override any values set by the tools.
+ for key, val in save.items():
+ self._dict[key] = val
+
+ # Finally, apply any flags to be merged in
+ if parse_flags: self.MergeFlags(parse_flags)
+
+ #######################################################################
+ # Utility methods that are primarily for internal use by SCons.
+ # These begin with lower-case letters.
+ #######################################################################
+
+ def get_builder(self, name):
+ """Fetch the builder with the specified name from the environment.
+ """
+ try:
+ return self._dict['BUILDERS'][name]
+ except KeyError:
+ return None
+
+ def get_CacheDir(self):
+ try:
+ path = self._CacheDir_path
+ except AttributeError:
+ path = SCons.Defaults.DefaultEnvironment()._CacheDir_path
+ try:
+ if path == self._last_CacheDir_path:
+ return self._last_CacheDir
+ except AttributeError:
+ pass
+ cd = SCons.CacheDir.CacheDir(path)
+ self._last_CacheDir_path = path
+ self._last_CacheDir = cd
+ return cd
+
+ def get_factory(self, factory, default='File'):
+ """Return a factory function for creating Nodes for this
+ construction environment.
+ """
+ name = default
+ try:
+ is_node = issubclass(factory, SCons.Node.Node)
+ except TypeError:
+ # The specified factory isn't a Node itself--it's
+ # most likely None, or possibly a callable.
+ pass
+ else:
+ if is_node:
+ # The specified factory is a Node (sub)class. Try to
+ # return the FS method that corresponds to the Node's
+ # name--that is, we return self.fs.Dir if they want a Dir,
+ # self.fs.File for a File, etc.
+ try: name = factory.__name__
+ except AttributeError: pass
+ else: factory = None
+ if not factory:
+ # They passed us None, or we picked up a name from a specified
+ # class, so return the FS method. (Note that we *don't*
+ # use our own self.{Dir,File} methods because that would
+ # cause env.subst() to be called twice on the file name,
+ # interfering with files that have $$ in them.)
+ factory = getattr(self.fs, name)
+ return factory
+
+ memoizer_counters.append(SCons.Memoize.CountValue('_gsm'))
+
+ def _gsm(self):
+ try:
+ return self._memo['_gsm']
+ except KeyError:
+ pass
+
+ result = {}
+
+ try:
+ scanners = self._dict['SCANNERS']
+ except KeyError:
+ pass
+ else:
+ # Reverse the scanner list so that, if multiple scanners
+ # claim they can scan the same suffix, earlier scanners
+ # in the list will overwrite later scanners, so that
+ # the result looks like a "first match" to the user.
+ if not SCons.Util.is_List(scanners):
+ scanners = [scanners]
+ else:
+ scanners = scanners[:] # copy so reverse() doesn't mod original
+ scanners.reverse()
+ for scanner in scanners:
+ for k in scanner.get_skeys(self):
+ result[k] = scanner
+
+ self._memo['_gsm'] = result
+
+ return result
+
+ def get_scanner(self, skey):
+ """Find the appropriate scanner given a key (usually a file suffix).
+ """
+ return self._gsm().get(skey)
+
+ def scanner_map_delete(self, kw=None):
+ """Delete the cached scanner map (if we need to).
+ """
+ try:
+ del self._memo['_gsm']
+ except KeyError:
+ pass
+
+ def _update(self, dict):
+ """Update an environment's values directly, bypassing the normal
+ checks that occur when users try to set items.
+ """
+ self._dict.update(dict)
+
+ def get_src_sig_type(self):
+ try:
+ return self.src_sig_type
+ except AttributeError:
+ t = SCons.Defaults.DefaultEnvironment().src_sig_type
+ self.src_sig_type = t
+ return t
+
+ def get_tgt_sig_type(self):
+ try:
+ return self.tgt_sig_type
+ except AttributeError:
+ t = SCons.Defaults.DefaultEnvironment().tgt_sig_type
+ self.tgt_sig_type = t
+ return t
+
+ #######################################################################
+ # Public methods for manipulating an Environment. These begin with
+ # upper-case letters. The essential characteristic of methods in
+ # this section is that they do *not* have corresponding same-named
+ # global functions. For example, a stand-alone Append() function
+ # makes no sense, because Append() is all about appending values to
+ # an Environment's construction variables.
+ #######################################################################
+
+ def Append(self, **kw):
+ """Append values to existing construction variables
+ in an Environment.
+ """
+ kw = copy_non_reserved_keywords(kw)
+ for key, val in kw.items():
+ # It would be easier on the eyes to write this using
+ # "continue" statements whenever we finish processing an item,
+ # but Python 1.5.2 apparently doesn't let you use "continue"
+ # within try:-except: blocks, so we have to nest our code.
+ try:
+ orig = self._dict[key]
+ except KeyError:
+ # No existing variable in the environment, so just set
+ # it to the new value.
+ self._dict[key] = val
+ else:
+ try:
+ # Check if the original looks like a dictionary.
+ # If it is, we can't just try adding the value because
+ # dictionaries don't have __add__() methods, and
+ # things like UserList will incorrectly coerce the
+ # original dict to a list (which we don't want).
+ update_dict = orig.update
+ except AttributeError:
+ try:
+ # Most straightforward: just try to add them
+ # together. This will work in most cases, when the
+ # original and new values are of compatible types.
+ self._dict[key] = orig + val
+ except (KeyError, TypeError):
+ try:
+ # Check if the original is a list.
+ add_to_orig = orig.append
+ except AttributeError:
+ # The original isn't a list, but the new
+ # value is (by process of elimination),
+ # so insert the original in the new value
+ # (if there's one to insert) and replace
+ # the variable with it.
+ if orig:
+ val.insert(0, orig)
+ self._dict[key] = val
+ else:
+ # The original is a list, so append the new
+ # value to it (if there's a value to append).
+ if val:
+ add_to_orig(val)
+ else:
+ # The original looks like a dictionary, so update it
+ # based on what we think the value looks like.
+ if SCons.Util.is_List(val):
+ for v in val:
+ orig[v] = None
+ else:
+ try:
+ update_dict(val)
+ except (AttributeError, TypeError, ValueError):
+ if SCons.Util.is_Dict(val):
+ for k, v in val.items():
+ orig[k] = v
+ else:
+ orig[val] = None
+ self.scanner_map_delete(kw)
+
+ def AppendENVPath(self, name, newpath, envname = 'ENV',
+ sep = os.pathsep, delete_existing=1):
+ """Append path elements to the path 'name' in the 'ENV'
+ dictionary for this environment. Will only add any particular
+ path once, and will normpath and normcase all paths to help
+ assure this. This can also handle the case where the env
+ variable is a list instead of a string.
+
+ If delete_existing is 0, a newpath which is already in the path
+ will not be moved to the end (it will be left where it is).
+ """
+
+ orig = ''
+ if self._dict.has_key(envname) and self._dict[envname].has_key(name):
+ orig = self._dict[envname][name]
+
+ nv = SCons.Util.AppendPath(orig, newpath, sep, delete_existing)
+
+ if not self._dict.has_key(envname):
+ self._dict[envname] = {}
+
+ self._dict[envname][name] = nv
+
+ def AppendUnique(self, delete_existing=0, **kw):
+ """Append values to existing construction variables
+ in an Environment, if they're not already there.
+ If delete_existing is 1, removes existing values first, so
+ values move to end.
+ """
+ kw = copy_non_reserved_keywords(kw)
+ for key, val in kw.items():
+ if SCons.Util.is_List(val):
+ val = _delete_duplicates(val, delete_existing)
+ if not self._dict.has_key(key) or self._dict[key] in ('', None):
+ self._dict[key] = val
+ elif SCons.Util.is_Dict(self._dict[key]) and \
+ SCons.Util.is_Dict(val):
+ self._dict[key].update(val)
+ elif SCons.Util.is_List(val):
+ dk = self._dict[key]
+ if not SCons.Util.is_List(dk):
+ dk = [dk]
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ else:
+ val = filter(lambda x, dk=dk: x not in dk, val)
+ self._dict[key] = dk + val
+ else:
+ dk = self._dict[key]
+ if SCons.Util.is_List(dk):
+ # By elimination, val is not a list. Since dk is a
+ # list, wrap val in a list first.
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ self._dict[key] = dk + [val]
+ else:
+ if not val in dk:
+ self._dict[key] = dk + [val]
+ else:
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ self._dict[key] = dk + val
+ self.scanner_map_delete(kw)
+
+ def Clone(self, tools=[], toolpath=None, parse_flags = None, **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.copy(self)
+ clone._dict = semi_deepcopy(self._dict)
+
+ try:
+ cbd = clone._dict['BUILDERS']
+ except KeyError:
+ pass
+ else:
+ clone._dict['BUILDERS'] = BuilderDict(cbd, clone)
+
+ # Check the methods added via AddMethod() and re-bind them to
+ # the cloned environment. Only do this if the attribute hasn't
+ # been overwritten by the user explicitly and still points to
+ # the added method.
+ clone.added_methods = []
+ for mw in self.added_methods:
+ if mw == getattr(self, mw.name):
+ clone.added_methods.append(mw.clone(clone))
+
+ clone._memo = {}
+
+ # Apply passed-in variables before the tools
+ # so the tools can use the new variables
+ kw = copy_non_reserved_keywords(kw)
+ new = {}
+ for key, value in kw.items():
+ new[key] = SCons.Subst.scons_subst_once(value, self, key)
+ apply(clone.Replace, (), new)
+
+ apply_tools(clone, tools, toolpath)
+
+ # apply them again in case the tools overwrote them
+ apply(clone.Replace, (), new)
+
+ # Finally, apply any flags to be merged in
+ if parse_flags: clone.MergeFlags(parse_flags)
+
+ if __debug__: logInstanceCreation(self, 'Environment.EnvironmentClone')
+ return clone
+
+ def Copy(self, *args, **kw):
+ global _warn_copy_deprecated
+ if _warn_copy_deprecated:
+ msg = "The env.Copy() method is deprecated; use the env.Clone() method instead."
+ SCons.Warnings.warn(SCons.Warnings.DeprecatedCopyWarning, msg)
+ _warn_copy_deprecated = False
+ return apply(self.Clone, args, kw)
+
+ def _changed_build(self, dependency, target, prev_ni):
+ if dependency.changed_state(target, prev_ni):
+ return 1
+ return self.decide_source(dependency, target, prev_ni)
+
+ def _changed_content(self, dependency, target, prev_ni):
+ return dependency.changed_content(target, prev_ni)
+
+ def _changed_source(self, dependency, target, prev_ni):
+ target_env = dependency.get_build_env()
+ type = target_env.get_tgt_sig_type()
+ if type == 'source':
+ return target_env.decide_source(dependency, target, prev_ni)
+ else:
+ return target_env.decide_target(dependency, target, prev_ni)
+
+ def _changed_timestamp_then_content(self, dependency, target, prev_ni):
+ return dependency.changed_timestamp_then_content(target, prev_ni)
+
+ def _changed_timestamp_newer(self, dependency, target, prev_ni):
+ return dependency.changed_timestamp_newer(target, prev_ni)
+
+ def _changed_timestamp_match(self, dependency, target, prev_ni):
+ return dependency.changed_timestamp_match(target, prev_ni)
+
+ def _copy_from_cache(self, src, dst):
+ return self.fs.copy(src, dst)
+
+ def _copy2_from_cache(self, src, dst):
+ return self.fs.copy2(src, dst)
+
+ def Decider(self, function):
+ copy_function = self._copy2_from_cache
+ if function in ('MD5', 'content'):
+ if not SCons.Util.md5:
+ raise UserError, "MD5 signatures are not available in this version of Python."
+ function = self._changed_content
+ elif function == 'MD5-timestamp':
+ function = self._changed_timestamp_then_content
+ elif function in ('timestamp-newer', 'make'):
+ function = self._changed_timestamp_newer
+ copy_function = self._copy_from_cache
+ elif function == 'timestamp-match':
+ function = self._changed_timestamp_match
+ elif not callable(function):
+ raise UserError, "Unknown Decider value %s" % repr(function)
+
+ # We don't use AddMethod because we don't want to turn the
+ # function, which only expects three arguments, into a bound
+ # method, which would add self as an initial, fourth argument.
+ self.decide_target = function
+ self.decide_source = function
+
+ self.copy_from_cache = copy_function
+
+ def Detect(self, progs):
+ """Return the first available program in progs.
+ """
+ if not SCons.Util.is_List(progs):
+ progs = [ progs ]
+ for prog in progs:
+ path = self.WhereIs(prog)
+ if path: return prog
+ return None
+
+ 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 Dump(self, key = None):
+ """
+ Using the standard Python pretty printer, dump the contents of the
+ scons build environment to stdout.
+
+ If the key passed in is anything other than None, then that will
+ be used as an index into the build environment dictionary and
+ whatever is found there will be fed into the pretty printer. Note
+ that this key is case sensitive.
+ """
+ import pprint
+ pp = pprint.PrettyPrinter(indent=2)
+ if key:
+ dict = self.Dictionary(key)
+ else:
+ dict = self.Dictionary()
+ return pp.pformat(dict)
+
+ def FindIxes(self, paths, prefix, suffix):
+ """
+ Search a list of paths for something that matches the prefix and suffix.
+
+ paths - the list of paths or nodes.
+ prefix - construction variable for the prefix.
+ suffix - construction variable for the suffix.
+ """
+
+ suffix = self.subst('$'+suffix)
+ prefix = self.subst('$'+prefix)
+
+ for path in paths:
+ dir,name = os.path.split(str(path))
+ if name[:len(prefix)] == prefix and name[-len(suffix):] == suffix:
+ return path
+
+ def ParseConfig(self, command, function=None, unique=1):
+ """
+ Use the specified function to parse the output of the command
+ in order to modify the current environment. The 'command' can
+ be a string or a list of strings representing a command and
+ its arguments. 'Function' is an optional argument that takes
+ the environment, the output of the command, and the unique flag.
+ If no function is specified, MergeFlags, which treats the output
+ as the result of a typical 'X-config' command (i.e. gtk-config),
+ will merge the output into the appropriate variables.
+ """
+ if function is None:
+ def parse_conf(env, cmd, unique=unique):
+ return env.MergeFlags(cmd, unique)
+ function = parse_conf
+ if SCons.Util.is_List(command):
+ command = string.join(command)
+ command = self.subst(command)
+ return function(self, self.backtick(command))
+
+ def ParseDepends(self, filename, must_exist=None, only_one=0):
+ """
+ Parse a mkdep-style file for explicit dependencies. This is
+ completely abusable, and should be unnecessary in the "normal"
+ case of proper SCons configuration, but it may help make
+ the transition from a Make hierarchy easier for some people
+ to swallow. It can also be genuinely useful when using a tool
+ that can write a .d file, but for which writing a scanner would
+ be too complicated.
+ """
+ filename = self.subst(filename)
+ try:
+ fp = open(filename, 'r')
+ except IOError:
+ if must_exist:
+ raise
+ return
+ lines = SCons.Util.LogicalLines(fp).readlines()
+ lines = filter(lambda l: l[0] != '#', lines)
+ tdlist = []
+ for line in lines:
+ try:
+ target, depends = string.split(line, ':', 1)
+ except (AttributeError, TypeError, ValueError):
+ # Python 1.5.2 throws TypeError if line isn't a string,
+ # Python 2.x throws AttributeError because it tries
+ # to call line.split(). Either can throw ValueError
+ # if the line doesn't split into two or more elements.
+ pass
+ else:
+ tdlist.append((string.split(target), string.split(depends)))
+ if only_one:
+ targets = reduce(lambda x, y: x+y, map(lambda p: p[0], tdlist))
+ if len(targets) > 1:
+ raise SCons.Errors.UserError, "More than one dependency target found in `%s': %s" % (filename, targets)
+ for target, depends in tdlist:
+ self.Depends(target, depends)
+
+ def Platform(self, platform):
+ platform = self.subst(platform)
+ return SCons.Platform.Platform(platform)(self)
+
+ def Prepend(self, **kw):
+ """Prepend values to existing construction variables
+ in an Environment.
+ """
+ kw = copy_non_reserved_keywords(kw)
+ for key, val in kw.items():
+ # It would be easier on the eyes to write this using
+ # "continue" statements whenever we finish processing an item,
+ # but Python 1.5.2 apparently doesn't let you use "continue"
+ # within try:-except: blocks, so we have to nest our code.
+ try:
+ orig = self._dict[key]
+ except KeyError:
+ # No existing variable in the environment, so just set
+ # it to the new value.
+ self._dict[key] = val
+ else:
+ try:
+ # Check if the original looks like a dictionary.
+ # If it is, we can't just try adding the value because
+ # dictionaries don't have __add__() methods, and
+ # things like UserList will incorrectly coerce the
+ # original dict to a list (which we don't want).
+ update_dict = orig.update
+ except AttributeError:
+ try:
+ # Most straightforward: just try to add them
+ # together. This will work in most cases, when the
+ # original and new values are of compatible types.
+ self._dict[key] = val + orig
+ except (KeyError, TypeError):
+ try:
+ # Check if the added value is a list.
+ add_to_val = val.append
+ except AttributeError:
+ # The added value isn't a list, but the
+ # original is (by process of elimination),
+ # so insert the the new value in the original
+ # (if there's one to insert).
+ if val:
+ orig.insert(0, val)
+ else:
+ # The added value is a list, so append
+ # the original to it (if there's a value
+ # to append).
+ if orig:
+ add_to_val(orig)
+ self._dict[key] = val
+ else:
+ # The original looks like a dictionary, so update it
+ # based on what we think the value looks like.
+ if SCons.Util.is_List(val):
+ for v in val:
+ orig[v] = None
+ else:
+ try:
+ update_dict(val)
+ except (AttributeError, TypeError, ValueError):
+ if SCons.Util.is_Dict(val):
+ for k, v in val.items():
+ orig[k] = v
+ else:
+ orig[val] = None
+ self.scanner_map_delete(kw)
+
+ def PrependENVPath(self, name, newpath, envname = 'ENV', sep = os.pathsep,
+ delete_existing=1):
+ """Prepend path elements to the path 'name' in the 'ENV'
+ dictionary for this environment. Will only add any particular
+ path once, and will normpath and normcase all paths to help
+ assure this. This can also handle the case where the env
+ variable is a list instead of a string.
+
+ If delete_existing is 0, a newpath which is already in the path
+ will not be moved to the front (it will be left where it is).
+ """
+
+ orig = ''
+ if self._dict.has_key(envname) and self._dict[envname].has_key(name):
+ orig = self._dict[envname][name]
+
+ nv = SCons.Util.PrependPath(orig, newpath, sep, delete_existing)
+
+ if not self._dict.has_key(envname):
+ self._dict[envname] = {}
+
+ self._dict[envname][name] = nv
+
+ def PrependUnique(self, delete_existing=0, **kw):
+ """Prepend values to existing construction variables
+ in an Environment, if they're not already there.
+ If delete_existing is 1, removes existing values first, so
+ values move to front.
+ """
+ kw = copy_non_reserved_keywords(kw)
+ for key, val in kw.items():
+ if SCons.Util.is_List(val):
+ val = _delete_duplicates(val, not delete_existing)
+ if not self._dict.has_key(key) or self._dict[key] in ('', None):
+ self._dict[key] = val
+ elif SCons.Util.is_Dict(self._dict[key]) and \
+ SCons.Util.is_Dict(val):
+ self._dict[key].update(val)
+ elif SCons.Util.is_List(val):
+ dk = self._dict[key]
+ if not SCons.Util.is_List(dk):
+ dk = [dk]
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ else:
+ val = filter(lambda x, dk=dk: x not in dk, val)
+ self._dict[key] = val + dk
+ else:
+ dk = self._dict[key]
+ if SCons.Util.is_List(dk):
+ # By elimination, val is not a list. Since dk is a
+ # list, wrap val in a list first.
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ self._dict[key] = [val] + dk
+ else:
+ if not val in dk:
+ self._dict[key] = [val] + dk
+ else:
+ if delete_existing:
+ dk = filter(lambda x, val=val: x not in val, dk)
+ self._dict[key] = val + dk
+ self.scanner_map_delete(kw)
+
+ def Replace(self, **kw):
+ """Replace existing construction variables in an Environment
+ with new construction variables and/or values.
+ """
+ try:
+ kwbd = kw['BUILDERS']
+ except KeyError:
+ pass
+ else:
+ kwbd = semi_deepcopy(kwbd)
+ del kw['BUILDERS']
+ self.__setitem__('BUILDERS', kwbd)
+ kw = copy_non_reserved_keywords(kw)
+ self._update(semi_deepcopy(kw))
+ self.scanner_map_delete(kw)
+
+ def ReplaceIxes(self, path, old_prefix, old_suffix, new_prefix, new_suffix):
+ """
+ Replace old_prefix with new_prefix and old_suffix with new_suffix.
+
+ env - Environment used to interpolate variables.
+ path - the path that will be modified.
+ old_prefix - construction variable for the old prefix.
+ old_suffix - construction variable for the old suffix.
+ new_prefix - construction variable for the new prefix.
+ new_suffix - construction variable for the new suffix.
+ """
+ old_prefix = self.subst('$'+old_prefix)
+ old_suffix = self.subst('$'+old_suffix)
+
+ new_prefix = self.subst('$'+new_prefix)
+ new_suffix = self.subst('$'+new_suffix)
+
+ dir,name = os.path.split(str(path))
+ if name[:len(old_prefix)] == old_prefix:
+ name = name[len(old_prefix):]
+ if name[-len(old_suffix):] == old_suffix:
+ name = name[:-len(old_suffix)]
+ return os.path.join(dir, new_prefix+name+new_suffix)
+
+ def SetDefault(self, **kw):
+ for k in kw.keys():
+ if self._dict.has_key(k):
+ del kw[k]
+ apply(self.Replace, (), kw)
+
+ def _find_toolpath_dir(self, tp):
+ return self.fs.Dir(self.subst(tp)).srcnode().abspath
+
+ def Tool(self, tool, toolpath=None, **kw):
+ if SCons.Util.is_String(tool):
+ tool = self.subst(tool)
+ if toolpath is None:
+ toolpath = self.get('toolpath', [])
+ toolpath = map(self._find_toolpath_dir, toolpath)
+ tool = apply(SCons.Tool.Tool, (tool, toolpath), kw)
+ tool(self)
+
+ def WhereIs(self, prog, path=None, pathext=None, reject=[]):
+ """Find prog in the path.
+ """
+ if path is None:
+ try:
+ path = self['ENV']['PATH']
+ except KeyError:
+ pass
+ elif SCons.Util.is_String(path):
+ path = self.subst(path)
+ if pathext is None:
+ try:
+ pathext = self['ENV']['PATHEXT']
+ except KeyError:
+ pass
+ elif SCons.Util.is_String(pathext):
+ pathext = self.subst(pathext)
+ prog = self.subst(prog)
+ path = SCons.Util.WhereIs(prog, path, pathext, reject)
+ if path: return path
+ return None
+
+ #######################################################################
+ # Public methods for doing real "SCons stuff" (manipulating
+ # dependencies, setting attributes on targets, etc.). These begin
+ # with upper-case letters. The essential characteristic of methods
+ # in this section is that they all *should* have corresponding
+ # same-named global functions.
+ #######################################################################
+
+ def Action(self, *args, **kw):
+ def subst_string(a, self=self):
+ if SCons.Util.is_String(a):
+ a = self.subst(a)
+ return a
+ nargs = map(subst_string, args)
+ nkw = self.subst_kw(kw)
+ return apply(SCons.Action.Action, nargs, nkw)
+
+ def AddPreAction(self, files, action):
+ nodes = self.arg2nodes(files, self.fs.Entry)
+ action = SCons.Action.Action(action)
+ uniq = {}
+ for executor in map(lambda n: n.get_executor(), nodes):
+ uniq[executor] = 1
+ for executor in uniq.keys():
+ executor.add_pre_action(action)
+ return nodes
+
+ def AddPostAction(self, files, action):
+ nodes = self.arg2nodes(files, self.fs.Entry)
+ action = SCons.Action.Action(action)
+ uniq = {}
+ for executor in map(lambda n: n.get_executor(), nodes):
+ uniq[executor] = 1
+ for executor in uniq.keys():
+ executor.add_post_action(action)
+ return nodes
+
+ def Alias(self, target, source=[], action=None, **kw):
+ tlist = self.arg2nodes(target, self.ans.Alias)
+ if not SCons.Util.is_List(source):
+ source = [source]
+ source = filter(None, source)
+
+ if not action:
+ if not source:
+ # There are no source files and no action, so just
+ # return a target list of classic Alias Nodes, without
+ # any builder. The externally visible effect is that
+ # this will make the wrapping Script.BuildTask class
+ # say that there's "Nothing to be done" for this Alias,
+ # instead of that it's "up to date."
+ return tlist
+
+ # No action, but there are sources. Re-call all the target
+ # builders to add the sources to each target.
+ result = []
+ for t in tlist:
+ bld = t.get_builder(AliasBuilder)
+ result.extend(bld(self, t, source))
+ return result
+
+ nkw = self.subst_kw(kw)
+ nkw.update({
+ 'action' : SCons.Action.Action(action),
+ 'source_factory' : self.fs.Entry,
+ 'multi' : 1,
+ 'is_explicit' : None,
+ })
+ bld = apply(SCons.Builder.Builder, (), nkw)
+
+ # Apply the Builder separately to each target so that the Aliases
+ # stay separate. If we did one "normal" Builder call with the
+ # whole target list, then all of the target Aliases would be
+ # associated under a single Executor.
+ result = []
+ for t in tlist:
+ # Calling the convert() method will cause a new Executor to be
+ # created from scratch, so we have to explicitly initialize
+ # it with the target's existing sources, plus our new ones,
+ # so nothing gets lost.
+ b = t.get_builder()
+ if b is None or b is AliasBuilder:
+ b = bld
+ else:
+ nkw['action'] = b.action + action
+ b = apply(SCons.Builder.Builder, (), nkw)
+ t.convert()
+ result.extend(b(self, t, t.sources + source))
+ return result
+
+ def AlwaysBuild(self, *targets):
+ tlist = []
+ for t in targets:
+ tlist.extend(self.arg2nodes(t, self.fs.Entry))
+ for t in tlist:
+ t.set_always_build()
+ return tlist
+
+ def BuildDir(self, *args, **kw):
+ if kw.has_key('build_dir'):
+ kw['variant_dir'] = kw['build_dir']
+ del kw['build_dir']
+ return apply(self.VariantDir, args, kw)
+
+ def Builder(self, **kw):
+ nkw = self.subst_kw(kw)
+ return apply(SCons.Builder.Builder, [], nkw)
+
+ def CacheDir(self, path):
+ import SCons.CacheDir
+ if not path is None:
+ path = self.subst(path)
+ self._CacheDir_path = path
+
+ def Clean(self, targets, files):
+ global CleanTargets
+ tlist = self.arg2nodes(targets, self.fs.Entry)
+ flist = self.arg2nodes(files, self.fs.Entry)
+ for t in tlist:
+ try:
+ CleanTargets[t].extend(flist)
+ except KeyError:
+ CleanTargets[t] = flist
+
+ def Configure(self, *args, **kw):
+ nargs = [self]
+ if args:
+ nargs = nargs + self.subst_list(args)[0]
+ nkw = self.subst_kw(kw)
+ nkw['_depth'] = kw.get('_depth', 0) + 1
+ try:
+ nkw['custom_tests'] = self.subst_kw(nkw['custom_tests'])
+ except KeyError:
+ pass
+ return apply(SCons.SConf.SConf, nargs, nkw)
+
+ def Command(self, target, source, action, **kw):
+ """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."""
+ bkw = {
+ 'action' : action,
+ 'target_factory' : self.fs.Entry,
+ 'source_factory' : self.fs.Entry,
+ }
+ try: bkw['source_scanner'] = kw['source_scanner']
+ except KeyError: pass
+ else: del kw['source_scanner']
+ bld = apply(SCons.Builder.Builder, (), bkw)
+ return apply(bld, (self, target, source), kw)
+
+ def Depends(self, target, dependency):
+ """Explicity specify that 'target's depend on 'dependency'."""
+ tlist = self.arg2nodes(target, self.fs.Entry)
+ dlist = self.arg2nodes(dependency, self.fs.Entry)
+ for t in tlist:
+ t.add_dependency(dlist)
+ return tlist
+
+ def Dir(self, name, *args, **kw):
+ """
+ """
+ s = self.subst(name)
+ if SCons.Util.is_Sequence(s):
+ result=[]
+ for e in s:
+ result.append(apply(self.fs.Dir, (e,) + args, kw))
+ return result
+ return apply(self.fs.Dir, (s,) + args, kw)
+
+ def NoClean(self, *targets):
+ """Tags a target so that it will not be cleaned by -c"""
+ tlist = []
+ for t in targets:
+ tlist.extend(self.arg2nodes(t, self.fs.Entry))
+ for t in tlist:
+ t.set_noclean()
+ return tlist
+
+ def NoCache(self, *targets):
+ """Tags a target so that it will not be cached"""
+ tlist = []
+ for t in targets:
+ tlist.extend(self.arg2nodes(t, self.fs.Entry))
+ for t in tlist:
+ t.set_nocache()
+ return tlist
+
+ def Entry(self, name, *args, **kw):
+ """
+ """
+ s = self.subst(name)
+ if SCons.Util.is_Sequence(s):
+ result=[]
+ for e in s:
+ result.append(apply(self.fs.Entry, (e,) + args, kw))
+ return result
+ return apply(self.fs.Entry, (s,) + args, kw)
+
+ def Environment(self, **kw):
+ return apply(SCons.Environment.Environment, [], self.subst_kw(kw))
+
+ def Execute(self, action, *args, **kw):
+ """Directly execute an action through an Environment
+ """
+ action = apply(self.Action, (action,) + args, kw)
+ result = action([], [], self)
+ if isinstance(result, SCons.Errors.BuildError):
+ errstr = result.errstr
+ if result.filename:
+ errstr = result.filename + ': ' + errstr
+ sys.stderr.write("scons: *** %s\n" % errstr)
+ return result.status
+ else:
+ return result
+
+ def File(self, name, *args, **kw):
+ """
+ """
+ s = self.subst(name)
+ if SCons.Util.is_Sequence(s):
+ result=[]
+ for e in s:
+ result.append(apply(self.fs.File, (e,) + args, kw))
+ return result
+ return apply(self.fs.File, (s,) + args, kw)
+
+ def FindFile(self, file, dirs):
+ file = self.subst(file)
+ nodes = self.arg2nodes(dirs, self.fs.Dir)
+ return SCons.Node.FS.find_file(file, tuple(nodes))
+
+ def Flatten(self, sequence):
+ return SCons.Util.flatten(sequence)
+
+ def GetBuildPath(self, files):
+ result = map(str, self.arg2nodes(files, self.fs.Entry))
+ if SCons.Util.is_List(files):
+ return result
+ else:
+ return result[0]
+
+ def Glob(self, pattern, ondisk=True, source=False, strings=False):
+ return self.fs.Glob(self.subst(pattern), ondisk, source, strings)
+
+ def Ignore(self, target, dependency):
+ """Ignore a dependency."""
+ tlist = self.arg2nodes(target, self.fs.Entry)
+ dlist = self.arg2nodes(dependency, self.fs.Entry)
+ for t in tlist:
+ t.add_ignore(dlist)
+ return tlist
+
+ def Literal(self, string):
+ return SCons.Subst.Literal(string)
+
+ def Local(self, *targets):
+ ret = []
+ for targ in targets:
+ if isinstance(targ, SCons.Node.Node):
+ targ.set_local()
+ ret.append(targ)
+ else:
+ for t in self.arg2nodes(targ, self.fs.Entry):
+ t.set_local()
+ ret.append(t)
+ return ret
+
+ def Precious(self, *targets):
+ tlist = []
+ for t in targets:
+ tlist.extend(self.arg2nodes(t, self.fs.Entry))
+ for t in tlist:
+ t.set_precious()
+ return tlist
+
+ def Repository(self, *dirs, **kw):
+ dirs = self.arg2nodes(list(dirs), self.fs.Dir)
+ apply(self.fs.Repository, dirs, kw)
+
+ def Requires(self, target, prerequisite):
+ """Specify that 'prerequisite' must be built before 'target',
+ (but 'target' does not actually depend on 'prerequisite'
+ and need not be rebuilt if it changes)."""
+ tlist = self.arg2nodes(target, self.fs.Entry)
+ plist = self.arg2nodes(prerequisite, self.fs.Entry)
+ for t in tlist:
+ t.add_prerequisite(plist)
+ return tlist
+
+ def Scanner(self, *args, **kw):
+ nargs = []
+ for arg in args:
+ if SCons.Util.is_String(arg):
+ arg = self.subst(arg)
+ nargs.append(arg)
+ nkw = self.subst_kw(kw)
+ return apply(SCons.Scanner.Base, nargs, nkw)
+
+ def SConsignFile(self, name=".sconsign", dbm_module=None):
+ if not name is None:
+ name = self.subst(name)
+ if not os.path.isabs(name):
+ name = os.path.join(str(self.fs.SConstruct_dir), name)
+ if name:
+ name = os.path.normpath(name)
+ sconsign_dir = os.path.dirname(name)
+ if sconsign_dir and not os.path.exists(sconsign_dir):
+ self.Execute(SCons.Defaults.Mkdir(sconsign_dir))
+ SCons.SConsign.File(name, dbm_module)
+
+ def SideEffect(self, side_effect, target):
+ """Tell scons that side_effects are built as side
+ effects of building targets."""
+ side_effects = self.arg2nodes(side_effect, self.fs.Entry)
+ targets = self.arg2nodes(target, self.fs.Entry)
+
+ for side_effect in side_effects:
+ if side_effect.multiple_side_effect_has_builder():
+ raise SCons.Errors.UserError, "Multiple ways to build the same target were specified for: %s" % str(side_effect)
+ side_effect.add_source(targets)
+ side_effect.side_effect = 1
+ self.Precious(side_effect)
+ for target in targets:
+ target.side_effects.append(side_effect)
+ return side_effects
+
+ def SourceCode(self, entry, builder):
+ """Arrange for a source code builder for (part of) a tree."""
+ entries = self.arg2nodes(entry, self.fs.Entry)
+ for entry in entries:
+ entry.set_src_builder(builder)
+ return entries
+
+ def SourceSignatures(self, type):
+ global _warn_source_signatures_deprecated
+ if _warn_source_signatures_deprecated:
+ msg = "The env.SourceSignatures() method is deprecated;\n" + \
+ "\tconvert your build to use the env.Decider() method instead."
+ SCons.Warnings.warn(SCons.Warnings.DeprecatedSourceSignaturesWarning, msg)
+ _warn_source_signatures_deprecated = False
+ type = self.subst(type)
+ self.src_sig_type = type
+ if type == 'MD5':
+ if not SCons.Util.md5:
+ raise UserError, "MD5 signatures are not available in this version of Python."
+ self.decide_source = self._changed_content
+ elif type == 'timestamp':
+ self.decide_source = self._changed_timestamp_match
+ else:
+ raise UserError, "Unknown source signature type '%s'" % type
+
+ def Split(self, arg):
+ """This function converts a string or list into a list of strings
+ or Nodes. This makes things easier for users by allowing files to
+ be specified as a white-space separated list to be split.
+ The input rules are:
+ - A single string containing names separated by spaces. These will be
+ split apart at the spaces.
+ - A single Node instance
+ - A list containing either strings or Node instances. Any strings
+ in the list are not split at spaces.
+ In all cases, the function returns a list of Nodes and strings."""
+ if SCons.Util.is_List(arg):
+ return map(self.subst, arg)
+ elif SCons.Util.is_String(arg):
+ return string.split(self.subst(arg))
+ else:
+ return [self.subst(arg)]
+
+ def TargetSignatures(self, type):
+ global _warn_target_signatures_deprecated
+ if _warn_target_signatures_deprecated:
+ msg = "The env.TargetSignatures() method is deprecated;\n" + \
+ "\tconvert your build to use the env.Decider() method instead."
+ SCons.Warnings.warn(SCons.Warnings.DeprecatedTargetSignaturesWarning, msg)
+ _warn_target_signatures_deprecated = False
+ type = self.subst(type)
+ self.tgt_sig_type = type
+ if type in ('MD5', 'content'):
+ if not SCons.Util.md5:
+ raise UserError, "MD5 signatures are not available in this version of Python."
+ self.decide_target = self._changed_content
+ elif type == 'timestamp':
+ self.decide_target = self._changed_timestamp_match
+ elif type == 'build':
+ self.decide_target = self._changed_build
+ elif type == 'source':
+ self.decide_target = self._changed_source
+ else:
+ raise UserError, "Unknown target signature type '%s'"%type
+
+ def Value(self, value, built_value=None):
+ """
+ """
+ return SCons.Node.Python.Value(value, built_value)
+
+ def VariantDir(self, variant_dir, src_dir, duplicate=1):
+ variant_dir = self.arg2nodes(variant_dir, self.fs.Dir)[0]
+ src_dir = self.arg2nodes(src_dir, self.fs.Dir)[0]
+ self.fs.VariantDir(variant_dir, src_dir, duplicate)
+
+ def FindSourceFiles(self, node='.'):
+ """ returns a list of all source files.
+ """
+ node = self.arg2nodes(node, self.fs.Entry)[0]
+
+ sources = []
+ # Uncomment this and get rid of the global definition when we
+ # drop support for pre-2.2 Python versions.
+ #def build_source(ss, result):
+ # for s in ss:
+ # if isinstance(s, SCons.Node.FS.Dir):
+ # build_source(s.all_children(), result)
+ # elif s.has_builder():
+ # build_source(s.sources, result)
+ # elif isinstance(s.disambiguate(), SCons.Node.FS.File):
+ # result.append(s)
+ build_source(node.all_children(), sources)
+
+ # now strip the build_node from the sources by calling the srcnode
+ # function
+ def get_final_srcnode(file):
+ srcnode = file.srcnode()
+ while srcnode != file.srcnode():
+ srcnode = file.srcnode()
+ return srcnode
+
+ # get the final srcnode for all nodes, this means stripping any
+ # attached build node.
+ map( get_final_srcnode, sources )
+
+ # remove duplicates
+ return list(set(sources))
+
+ def FindInstalledFiles(self):
+ """ returns the list of all targets of the Install and InstallAs Builder.
+ """
+ from SCons.Tool import install
+ if install._UNIQUE_INSTALLED_FILES is None:
+ install._UNIQUE_INSTALLED_FILES = SCons.Util.uniquer_hashables(install._INSTALLED_FILES)
+ return install._UNIQUE_INSTALLED_FILES
+
+class OverrideEnvironment(Base):
+ """A proxy that overrides variables in a wrapped construction
+ environment by returning values from an overrides dictionary in
+ preference to values from the underlying subject environment.
+
+ This is a lightweight (I hope) proxy that passes through most use of
+ attributes to the underlying Environment.Base class, but has just
+ enough additional methods defined to act like a real construction
+ environment with overridden values. It can wrap either a Base
+ construction environment, or another OverrideEnvironment, which
+ can in turn nest arbitrary OverrideEnvironments...
+
+ Note that we do *not* call the underlying base class
+ (SubsitutionEnvironment) initialization, because we get most of those
+ from proxying the attributes of the subject construction environment.
+ But because we subclass SubstitutionEnvironment, this class also
+ has inherited arg2nodes() and subst*() methods; those methods can't
+ be proxied because they need *this* object's methods to fetch the
+ values from the overrides dictionary.
+ """
+
+ if SCons.Memoize.use_memoizer:
+ __metaclass__ = SCons.Memoize.Memoized_Metaclass
+
+ def __init__(self, subject, overrides={}):
+ if __debug__: logInstanceCreation(self, 'Environment.OverrideEnvironment')
+ self.__dict__['__subject'] = subject
+ self.__dict__['overrides'] = overrides
+
+ # Methods that make this class act like a proxy.
+ def __getattr__(self, name):
+ return getattr(self.__dict__['__subject'], name)
+ def __setattr__(self, name, value):
+ setattr(self.__dict__['__subject'], name, value)
+
+ # Methods that make this class act like a dictionary.
+ def __getitem__(self, key):
+ try:
+ return self.__dict__['overrides'][key]
+ except KeyError:
+ return self.__dict__['__subject'].__getitem__(key)
+ def __setitem__(self, key, value):
+ if not is_valid_construction_var(key):
+ raise SCons.Errors.UserError, "Illegal construction variable `%s'" % key
+ self.__dict__['overrides'][key] = value
+ def __delitem__(self, key):
+ try:
+ del self.__dict__['overrides'][key]
+ except KeyError:
+ deleted = 0
+ else:
+ deleted = 1
+ try:
+ result = self.__dict__['__subject'].__delitem__(key)
+ except KeyError:
+ if not deleted:
+ raise
+ result = None
+ return result
+ def get(self, key, default=None):
+ """Emulates the get() method of dictionaries."""
+ try:
+ return self.__dict__['overrides'][key]
+ except KeyError:
+ return self.__dict__['__subject'].get(key, default)
+ def has_key(self, key):
+ try:
+ self.__dict__['overrides'][key]
+ return 1
+ except KeyError:
+ return self.__dict__['__subject'].has_key(key)
+ def __contains__(self, key):
+ if self.__dict__['overrides'].__contains__(key):
+ return 1
+ return self.__dict__['__subject'].__contains__(key)
+ def Dictionary(self):
+ """Emulates the items() method of dictionaries."""
+ d = self.__dict__['__subject'].Dictionary().copy()
+ d.update(self.__dict__['overrides'])
+ return d
+ def items(self):
+ """Emulates the items() method of dictionaries."""
+ return self.Dictionary().items()
+
+ # Overridden private construction environment methods.
+ def _update(self, dict):
+ """Update an environment's values directly, bypassing the normal
+ checks that occur when users try to set items.
+ """
+ self.__dict__['overrides'].update(dict)
+
+ def gvars(self):
+ return self.__dict__['__subject'].gvars()
+
+ def lvars(self):
+ lvars = self.__dict__['__subject'].lvars()
+ lvars.update(self.__dict__['overrides'])
+ return lvars
+
+ # Overridden public construction environment methods.
+ def Replace(self, **kw):
+ kw = copy_non_reserved_keywords(kw)
+ self.__dict__['overrides'].update(semi_deepcopy(kw))
+
+# The entry point that will be used by the external world
+# to refer to a construction environment. This allows the wrapper
+# interface to extend a construction environment for its own purposes
+# by subclassing SCons.Environment.Base and then assigning the
+# class to SCons.Environment.Environment.
+
+Environment = Base
+
+# An entry point for returning a proxy subclass instance that overrides
+# the subst*() methods so they don't actually perform construction
+# variable substitution. This is specifically intended to be the shim
+# layer in between global function calls (which don't want construction
+# variable substitution) and the DefaultEnvironment() (which would
+# substitute variables if left to its own devices)."""
+#
+# We have to wrap this in a function that allows us to delay definition of
+# the class until it's necessary, so that when it subclasses Environment
+# it will pick up whatever Environment subclass the wrapper interface
+# might have assigned to SCons.Environment.Environment.
+
+def NoSubstitutionProxy(subject):
+ class _NoSubstitutionProxy(Environment):
+ def __init__(self, subject):
+ self.__dict__['__subject'] = subject
+ def __getattr__(self, name):
+ return getattr(self.__dict__['__subject'], name)
+ def __setattr__(self, name, value):
+ return setattr(self.__dict__['__subject'], name, value)
+ def raw_to_mode(self, dict):
+ try:
+ raw = dict['raw']
+ except KeyError:
+ pass
+ else:
+ del dict['raw']
+ dict['mode'] = raw
+ def subst(self, string, *args, **kwargs):
+ return string
+ def subst_kw(self, kw, *args, **kwargs):
+ return kw
+ def subst_list(self, string, *args, **kwargs):
+ nargs = (string, self,) + args
+ nkw = kwargs.copy()
+ nkw['gvars'] = {}
+ self.raw_to_mode(nkw)
+ return apply(SCons.Subst.scons_subst_list, nargs, nkw)
+ def subst_target_source(self, string, *args, **kwargs):
+ nargs = (string, self,) + args
+ nkw = kwargs.copy()
+ nkw['gvars'] = {}
+ self.raw_to_mode(nkw)
+ return apply(SCons.Subst.scons_subst, nargs, nkw)
+ return _NoSubstitutionProxy(subject)
projects / senf.git / blobdiff