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"""SCons.Environment
XXX
"""
#
# __COPYRIGHT__
#
# 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 os
import os.path
import re
from UserDict import UserDict
import SCons.Action
import SCons.Builder
import SCons.Defaults
import SCons.Errors
import SCons.Node
import SCons.Node.FS
import SCons.Platform
import SCons.Tool
import SCons.Util
import SCons.Warnings
def installString(target, source, env):
return 'Install file: "%s" as "%s"' % (source[0], target[0])
installAction = SCons.Action.Action(SCons.Node.FS.LinkFunc, installString)
InstallBuilder = SCons.Builder.Builder(name='Install', action=installAction)
def our_deepcopy(x):
"""deepcopy lists and dictionaries, and just copy the reference
for everything else."""
if SCons.Util.is_Dict(x):
copy = {}
for key in x.keys():
copy[key] = our_deepcopy(x[key])
elif SCons.Util.is_List(x):
copy = map(our_deepcopy, x)
else:
copy = x
return copy
class BuilderWrapper:
"""Wrapper class that associates an environment with a Builder at
instantiation."""
def __init__(self, env, builder):
self.env = env
self.builder = builder
def __call__(self, *args, **kw):
return apply(self.builder, (self.env,) + args, kw)
# 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 __setitem__(self, item, val):
UserDict.__setitem__(self, item, val)
try:
self.setenvattr(item, val)
except AttributeError:
# Have to catch this because sometimes __setitem__ gets
# called out of __init__, when we don't have an env
# attribute yet, nor do we want one!
pass
def setenvattr(self, item, val):
"""Set the corresponding environment attribute for this Builder.
If the value is already a BuilderWrapper, we pull the builder
out of it and make another one, so that making a copy of an
existing BuilderDict is guaranteed separate wrappers for each
Builder + Environment pair."""
try:
builder = val.builder
except AttributeError:
builder = val
setattr(self.env, item, BuilderWrapper(self.env, builder))
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)
_rm = re.compile(r'\$[()]')
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.
"""
def __init__(self,
platform=SCons.Platform.Platform(),
tools=None,
options=None,
**kw):
self.fs = SCons.Node.FS.default_fs
self._dict = our_deepcopy(SCons.Defaults.ConstructionEnvironment)
self._dict['BUILDERS'] = BuilderDict(self._dict['BUILDERS'], self)
if SCons.Util.is_String(platform):
platform = SCons.Platform.Platform(platform)
platform(self)
# Apply the passed-in variables before calling the tools,
# because they may use some of them:
apply(self.Replace, (), kw)
# Update the environment with the customizable options
# before calling the tools, since they may use some of the options:
if options:
options.Update(self)
if tools is None:
tools = ['default']
for tool in tools:
if SCons.Util.is_String(tool):
tool = SCons.Tool.Tool(tool)
tool(self, platform)
# Reapply the passed in variables after calling the tools,
# since they should overide anything set by the tools:
apply(self.Replace, (), kw)
# Update the environment with the customizable options
# after calling the tools, since they should override anything
# set by the tools:
if options:
options.Update(self)
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.copy(self)
clone._dict = our_deepcopy(self._dict)
try:
cbd = clone._dict['BUILDERS']
clone._dict['BUILDERS'] = BuilderDict(cbd, clone)
except KeyError:
pass
apply(clone.Replace, (), kw)
return clone
def Scanners(self):
pass # XXX
def Update(self, **kw):
"""A deprecated synonym for Replace().
"""
apply(self.Replace, (), kw)
def Replace(self, **kw):
"""Replace existing construction variables in an Environment
with new construction variables and/or values.
"""
try:
kwbd = our_deepcopy(kw['BUILDERS'])
del kw['BUILDERS']
self.__setitem__('BUILDERS', kwbd)
except KeyError:
pass
self._dict.update(our_deepcopy(kw))
def Append(self, **kw):
"""Append values to existing construction variables
in an Environment.
"""
kw = our_deepcopy(kw)
for key in kw.keys():
if not self._dict.has_key(key):
self._dict[key] = kw[key]
elif SCons.Util.is_List(self._dict[key]) and not \
SCons.Util.is_List(kw[key]):
self._dict[key] = self._dict[key] + [ kw[key] ]
elif SCons.Util.is_List(kw[key]) and not \
SCons.Util.is_List(self._dict[key]):
self._dict[key] = [ self._dict[key] ] + kw[key]
elif SCons.Util.is_Dict(self._dict[key]) and \
SCons.Util.is_Dict(kw[key]):
self._dict[key].update(kw[key])
else:
self._dict[key] = self._dict[key] + kw[key]
def Prepend(self, **kw):
"""Prepend values to existing construction variables
in an Environment.
"""
kw = our_deepcopy(kw)
for key in kw.keys():
if not self._dict.has_key(key):
self._dict[key] = kw[key]
elif SCons.Util.is_List(self._dict[key]) and not \
SCons.Util.is_List(kw[key]):
self._dict[key] = [ kw[key] ] + self._dict[key]
elif SCons.Util.is_List(kw[key]) and not \
SCons.Util.is_List(self._dict[key]):
self._dict[key] = kw[key] + [ self._dict[key] ]
elif SCons.Util.is_Dict(self._dict[key]) and \
SCons.Util.is_Dict(kw[key]):
self._dict[key].update(kw[key])
else:
self._dict[key] = kw[key] + self._dict[key]
def Depends(self, target, dependency):
"""Explicity specify that 'target's depend on 'dependency'."""
tlist = SCons.Node.arg2nodes(target, self.fs.File)
dlist = SCons.Node.arg2nodes(dependency, self.fs.File)
for t in tlist:
t.add_dependency(dlist)
if len(tlist) == 1:
tlist = tlist[0]
return tlist
def Ignore(self, target, dependency):
"""Ignore a dependency."""
tlist = SCons.Node.arg2nodes(target, self.fs.File)
dlist = SCons.Node.arg2nodes(dependency, self.fs.File)
for t in tlist:
t.add_ignore(dlist)
if len(tlist) == 1:
tlist = tlist[0]
return tlist
def Precious(self, *targets):
tlist = []
for t in targets:
tlist.extend(SCons.Node.arg2nodes(t, self.fs.File))
for t in tlist:
t.set_precious()
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 __setitem__(self, key, value):
if key == 'BUILDERS':
try:
bd = self._dict[key]
for k in bd.keys():
del bd[k]
except KeyError:
self._dict[key] = BuilderDict(kwbd, self)
self._dict[key].update(value)
else:
self._dict[key] = value
def __getitem__(self, key):
return self._dict[key]
def __delitem__(self, key):
del self._dict[key]
def has_key(self, key):
return self._dict.has_key(key)
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(action=action)
return bld(self, target, source)
def Install(self, dir, source):
"""Install specified files in the given directory."""
sources = SCons.Node.arg2nodes(source, self.fs.File)
dnodes = SCons.Node.arg2nodes(dir, self.fs.Dir)
tgt = []
for dnode in dnodes:
for src in sources:
target = SCons.Node.FS.default_fs.File(src.name, dnode)
tgt.append(InstallBuilder(self, target, src))
if len(tgt) == 1:
tgt = tgt[0]
return tgt
def InstallAs(self, target, source):
"""Install sources as targets."""
sources = SCons.Node.arg2nodes(source, self.fs.File)
targets = SCons.Node.arg2nodes(target, self.fs.File)
ret = []
for src, tgt in map(lambda x, y: (x, y), sources, targets):
ret.append(InstallBuilder(self, tgt, src))
if len(ret) == 1:
ret = ret[0]
return ret
def SideEffect(self, side_effect, target):
"""Tell scons that side_effects are built as side
effects of building targets."""
side_effects = SCons.Node.arg2nodes(side_effect, self.fs.File)
targets = SCons.Node.arg2nodes(target, self.fs.File)
for side_effect in side_effects:
# A builder of 1 means the node is supposed to appear
# buildable without actually having a builder, so we allow
# it to be a side effect as well.
if side_effect.has_builder() and side_effect.builder != 1:
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)
if len(side_effects) == 1:
return side_effects[0]
else:
return side_effects
def subst(self, string, raw=0):
"""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.
"""
if raw:
regex_remove = None
else:
regex_remove = _rm
return SCons.Util.scons_subst(string, self._dict, {}, regex_remove)
def subst_list(self, string, raw=0):
"""Calls through to SCons.Util.scons_subst_list(). See
the documentation for that function."""
if raw:
regex_remove = None
else:
regex_remove = _rm
return SCons.Util.scons_subst_list(string, self._dict, {}, regex_remove)
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
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 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 WhereIs(self, prog):
"""Find prog in the path.
"""
path = None
pathext = None
if self.has_key('ENV'):
if self['ENV'].has_key('PATH'):
path = self['ENV']['PATH']
if self['ENV'].has_key('PATHEXT'):
pathext = self['ENV']['PATHEXT']
path = SCons.Util.WhereIs(prog, path, pathext)
if path: return path
return None
def Override(self, overrides):
"""
Produce a modified environment whose variables
are overriden by the overrides dictionaries.
overrides - a dictionary that will override
the variables of this environment.
This function is much more efficient than Copy()
or creating a new Environment because it doesn't do
a deep copy of the dictionary, and doesn't do a copy
at all if there are no overrides.
"""
if overrides:
env = copy.copy(self)
env._dict = copy.copy(self._dict)
env._dict.update(overrides)
return env
else:
return self
def get(self, key, default=None):
"Emulates the get() method of dictionaries."""
return self._dict.get(key, default)
def items(self):
"Emulates the items() method of dictionaries."""
return self._dict.items()
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('$%s'%suffix)
prefix = self.subst('$%s'%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 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('$%s'%old_prefix)
old_suffix = self.subst('$%s'%old_suffix)
new_prefix = self.subst('$%s'%new_prefix)
new_suffix = self.subst('$%s'%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)
|