# MIT License
#
# Copyright 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.
#
"""Builders and other things for the local site.
Here's where we'll duplicate the functionality of autoconf until we
move it into the installation procedure or use something like qmconf.
The code that reads the registry to find MSVC components was borrowed
from distutils.msvccompiler.
"""
import os
import shutil
import stat
import sys
import time
import SCons.Action
import SCons.Builder
import SCons.CacheDir
import SCons.Environment
import SCons.PathList
import SCons.Scanner.Dir
import SCons.Subst
import SCons.Tool
# A placeholder for a default Environment (for fetching source files
# from source code management systems and the like). This must be
# initialized later, after the top-level directory is set by the calling
# interface.
_default_env = None
# Lazily instantiate the default environment so the overhead of creating
# it doesn't apply when it's not needed.
[docs]def _fetch_DefaultEnvironment(*args, **kw):
"""Returns the already-created default construction environment."""
global _default_env
return _default_env
[docs]def DefaultEnvironment(*args, **kw):
"""
Initial public entry point for creating the default construction
Environment.
After creating the environment, we overwrite our name
(DefaultEnvironment) with the _fetch_DefaultEnvironment() function,
which more efficiently returns the initialized default construction
environment without checking for its existence.
(This function still exists with its _default_check because someone
else (*cough* Script/__init__.py *cough*) may keep a reference
to this function. So we can't use the fully functional idiom of
having the name originally be a something that *only* creates the
construction environment and then overwrites the name.)
"""
global _default_env
if not _default_env:
import SCons.Util
_default_env = SCons.Environment.Environment(*args, **kw)
_default_env.Decider('content')
global DefaultEnvironment
DefaultEnvironment = _fetch_DefaultEnvironment
_default_env._CacheDir_path = None
return _default_env
# Emitters for setting the shared attribute on object files,
# and an action for checking that all of the source files
# going into a shared library are, in fact, shared.
[docs]def StaticObjectEmitter(target, source, env):
for tgt in target:
tgt.attributes.shared = None
return target, source
[docs]def SharedObjectEmitter(target, source, env):
for tgt in target:
tgt.attributes.shared = 1
return target, source
[docs]def SharedFlagChecker(source, target, env):
same = env.subst('$STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME')
if same == '0' or same == '' or same == 'False':
for src in source:
try:
shared = src.attributes.shared
except AttributeError:
shared = None
if not shared:
raise SCons.Errors.UserError(
"Source file: %s is static and is not compatible with shared target: %s" % (src, target[0]))
SharedCheck = SCons.Action.Action(SharedFlagChecker, None)
# Some people were using these variable name before we made
# SourceFileScanner part of the public interface. Don't break their
# SConscript files until we've given them some fair warning and a
# transition period.
CScan = SCons.Tool.CScanner
DScan = SCons.Tool.DScanner
LaTeXScan = SCons.Tool.LaTeXScanner
ObjSourceScan = SCons.Tool.SourceFileScanner
ProgScan = SCons.Tool.ProgramScanner
# These aren't really tool scanners, so they don't quite belong with
# the rest of those in Tool/__init__.py, but I'm not sure where else
# they should go. Leave them here for now.
DirScanner = SCons.Scanner.Dir.DirScanner()
DirEntryScanner = SCons.Scanner.Dir.DirEntryScanner()
# Actions for common languages.
CAction = SCons.Action.Action("$CCCOM", "$CCCOMSTR")
ShCAction = SCons.Action.Action("$SHCCCOM", "$SHCCCOMSTR")
CXXAction = SCons.Action.Action("$CXXCOM", "$CXXCOMSTR")
ShCXXAction = SCons.Action.Action("$SHCXXCOM", "$SHCXXCOMSTR")
DAction = SCons.Action.Action("$DCOM", "$DCOMSTR")
ShDAction = SCons.Action.Action("$SHDCOM", "$SHDCOMSTR")
ASAction = SCons.Action.Action("$ASCOM", "$ASCOMSTR")
ASPPAction = SCons.Action.Action("$ASPPCOM", "$ASPPCOMSTR")
LinkAction = SCons.Action.Action("$LINKCOM", "$LINKCOMSTR")
ShLinkAction = SCons.Action.Action("$SHLINKCOM", "$SHLINKCOMSTR")
LdModuleLinkAction = SCons.Action.Action("$LDMODULECOM", "$LDMODULECOMSTR")
# Common tasks that we allow users to perform in platform-independent
# ways by creating ActionFactory instances.
ActionFactory = SCons.Action.ActionFactory
[docs]def get_paths_str(dest):
# If dest is a list, we need to manually call str() on each element
if SCons.Util.is_List(dest):
elem_strs = []
for element in dest:
elem_strs.append('"' + str(element) + '"')
return '[' + ', '.join(elem_strs) + ']'
else:
return '"' + str(dest) + '"'
permission_dic = {
'u': {
'r': stat.S_IRUSR,
'w': stat.S_IWUSR,
'x': stat.S_IXUSR
},
'g': {
'r': stat.S_IRGRP,
'w': stat.S_IWGRP,
'x': stat.S_IXGRP
},
'o': {
'r': stat.S_IROTH,
'w': stat.S_IWOTH,
'x': stat.S_IXOTH
}
}
[docs]def chmod_func(dest, mode):
import SCons.Util
from string import digits
SCons.Node.FS.invalidate_node_memos(dest)
if not SCons.Util.is_List(dest):
dest = [dest]
if SCons.Util.is_String(mode) and 0 not in [i in digits for i in mode]:
mode = int(mode, 8)
if not SCons.Util.is_String(mode):
for element in dest:
os.chmod(str(element), mode)
else:
mode = str(mode)
for operation in mode.split(","):
if "=" in operation:
operator = "="
elif "+" in operation:
operator = "+"
elif "-" in operation:
operator = "-"
else:
raise SyntaxError("Could not find +, - or =")
operation_list = operation.split(operator)
if len(operation_list) != 2:
raise SyntaxError("More than one operator found")
user = operation_list[0].strip().replace("a", "ugo")
permission = operation_list[1].strip()
new_perm = 0
for u in user:
for p in permission:
try:
new_perm = new_perm | permission_dic[u][p]
except KeyError:
raise SyntaxError("Unrecognized user or permission format")
for element in dest:
curr_perm = os.stat(str(element)).st_mode
if operator == "=":
os.chmod(str(element), new_perm)
elif operator == "+":
os.chmod(str(element), curr_perm | new_perm)
elif operator == "-":
os.chmod(str(element), curr_perm & ~new_perm)
[docs]def chmod_strfunc(dest, mode):
import SCons.Util
if not SCons.Util.is_String(mode):
return 'Chmod(%s, 0%o)' % (get_paths_str(dest), mode)
else:
return 'Chmod(%s, "%s")' % (get_paths_str(dest), str(mode))
Chmod = ActionFactory(chmod_func, chmod_strfunc)
[docs]def copy_func(dest, src, symlinks=True):
"""
If symlinks (is true), then a symbolic link will be
shallow copied and recreated as a symbolic link; otherwise, copying
a symbolic link will be equivalent to copying the symbolic link's
final target regardless of symbolic link depth.
"""
dest = str(dest)
src = str(src)
SCons.Node.FS.invalidate_node_memos(dest)
if SCons.Util.is_List(src) and os.path.isdir(dest):
for file in src:
shutil.copy2(file, dest)
return 0
elif os.path.islink(src):
if symlinks:
return os.symlink(os.readlink(src), dest)
else:
return copy_func(dest, os.path.realpath(src))
elif os.path.isfile(src):
shutil.copy2(src, dest)
return 0
else:
shutil.copytree(src, dest, symlinks)
# copytree returns None in python2 and destination string in python3
# A error is raised in both cases, so we can just return 0 for success
return 0
Copy = ActionFactory(
copy_func,
lambda dest, src, symlinks=True: 'Copy("%s", "%s")' % (dest, src)
)
[docs]def delete_func(dest, must_exist=0):
SCons.Node.FS.invalidate_node_memos(dest)
if not SCons.Util.is_List(dest):
dest = [dest]
for entry in dest:
entry = str(entry)
# os.path.exists returns False with broken links that exist
entry_exists = os.path.exists(entry) or os.path.islink(entry)
if not entry_exists and not must_exist:
continue
# os.path.isdir returns True when entry is a link to a dir
if os.path.isdir(entry) and not os.path.islink(entry):
shutil.rmtree(entry, True)
continue
os.unlink(entry)
[docs]def delete_strfunc(dest, must_exist=0):
return 'Delete(%s)' % get_paths_str(dest)
Delete = ActionFactory(delete_func, delete_strfunc)
[docs]def mkdir_func(dest):
SCons.Node.FS.invalidate_node_memos(dest)
if not SCons.Util.is_List(dest):
dest = [dest]
for entry in dest:
os.makedirs(str(entry), exist_ok=True)
Mkdir = ActionFactory(mkdir_func,
lambda _dir: 'Mkdir(%s)' % get_paths_str(_dir))
[docs]def move_func(dest, src):
SCons.Node.FS.invalidate_node_memos(dest)
SCons.Node.FS.invalidate_node_memos(src)
shutil.move(src, dest)
Move = ActionFactory(move_func,
lambda dest, src: 'Move("%s", "%s")' % (dest, src),
convert=str)
[docs]def touch_func(dest):
SCons.Node.FS.invalidate_node_memos(dest)
if not SCons.Util.is_List(dest):
dest = [dest]
for file in dest:
file = str(file)
mtime = int(time.time())
if os.path.exists(file):
atime = os.path.getatime(file)
else:
with open(file, 'w'):
atime = mtime
os.utime(file, (atime, mtime))
Touch = ActionFactory(touch_func,
lambda file: 'Touch(%s)' % get_paths_str(file))
# Internal utility functions
# pylint: disable-msg=too-many-arguments
[docs]def _concat(prefix, items_iter, suffix, env, f=lambda x: x, target=None, source=None, affect_signature=True):
"""
Creates a new list from 'items_iter' by first interpolating each element
in the list using the 'env' dictionary and then calling f on the
list, and finally calling _concat_ixes to concatenate 'prefix' and
'suffix' onto each element of the list.
"""
if not items_iter:
return items_iter
l = f(SCons.PathList.PathList(items_iter).subst_path(env, target, source))
if l is not None:
items_iter = l
if not affect_signature:
value = ['$(']
else:
value = []
value += _concat_ixes(prefix, items_iter, suffix, env)
if not affect_signature:
value += ["$)"]
return value
# pylint: enable-msg=too-many-arguments
[docs]def _concat_ixes(prefix, items_iter, suffix, env):
"""
Creates a new list from 'items_iter' by concatenating the 'prefix' and
'suffix' arguments onto each element of the list. A trailing space
on 'prefix' or leading space on 'suffix' will cause them to be put
into separate list elements rather than being concatenated.
"""
result = []
# ensure that prefix and suffix are strings
prefix = str(env.subst(prefix, SCons.Subst.SUBST_RAW))
suffix = str(env.subst(suffix, SCons.Subst.SUBST_RAW))
for x in SCons.Util.flatten(items_iter):
if isinstance(x, SCons.Node.FS.File):
result.append(x)
continue
x = str(x)
if x:
if prefix:
if prefix[-1] == ' ':
result.append(prefix[:-1])
elif x[:len(prefix)] != prefix:
x = prefix + x
result.append(x)
if suffix:
if suffix[0] == ' ':
result.append(suffix[1:])
elif x[-len(suffix):] != suffix:
result[-1] = result[-1] + suffix
return result
[docs]def _stripixes(prefix, itms, suffix, stripprefixes, stripsuffixes, env, c=None):
"""
This is a wrapper around _concat()/_concat_ixes() that checks for
the existence of prefixes or suffixes on list items and strips them
where it finds them. This is used by tools (like the GNU linker)
that need to turn something like 'libfoo.a' into '-lfoo'.
"""
if not itms:
return itms
if not callable(c):
env_c = env['_concat']
if env_c != _concat and callable(env_c):
# There's a custom _concat() method in the construction
# environment, and we've allowed people to set that in
# the past (see test/custom-concat.py), so preserve the
# backwards compatibility.
c = env_c
else:
c = _concat_ixes
stripprefixes = list(map(env.subst, SCons.Util.flatten(stripprefixes)))
stripsuffixes = list(map(env.subst, SCons.Util.flatten(stripsuffixes)))
stripped = []
for l in SCons.PathList.PathList(itms).subst_path(env, None, None):
if isinstance(l, SCons.Node.FS.File):
stripped.append(l)
continue
if not SCons.Util.is_String(l):
l = str(l)
for stripprefix in stripprefixes:
lsp = len(stripprefix)
if l[:lsp] == stripprefix:
l = l[lsp:]
# Do not strip more than one prefix
break
for stripsuffix in stripsuffixes:
lss = len(stripsuffix)
if l[-lss:] == stripsuffix:
l = l[:-lss]
# Do not strip more than one suffix
break
stripped.append(l)
return c(prefix, stripped, suffix, env)
[docs]def processDefines(defs):
"""process defines, resolving strings, lists, dictionaries, into a list of
strings
"""
if SCons.Util.is_List(defs):
l = []
for d in defs:
if d is None:
continue
elif SCons.Util.is_List(d) or isinstance(d, tuple):
if len(d) >= 2:
l.append(str(d[0]) + '=' + str(d[1]))
else:
l.append(str(d[0]))
elif SCons.Util.is_Dict(d):
for macro, value in d.items():
if value is not None:
l.append(str(macro) + '=' + str(value))
else:
l.append(str(macro))
elif SCons.Util.is_String(d):
l.append(str(d))
else:
raise SCons.Errors.UserError("DEFINE %s is not a list, dict, string or None." % repr(d))
elif SCons.Util.is_Dict(defs):
# The items in a dictionary are stored in random order, but
# if the order of the command-line options changes from
# invocation to invocation, then the signature of the command
# line will change and we'll get random unnecessary rebuilds.
# Consequently, we have to sort the keys to ensure a
# consistent order...
l = []
for k, v in sorted(defs.items()):
if v is None:
l.append(str(k))
else:
l.append(str(k) + '=' + str(v))
else:
l = [str(defs)]
return l
[docs]def _defines(prefix, defs, suffix, env, target=None, source=None, c=_concat_ixes):
"""A wrapper around _concat_ixes that turns a list or string
into a list of C preprocessor command-line definitions.
"""
return c(prefix, env.subst_list(processDefines(defs), target=target, source=source), suffix, env)
[docs]class NullCmdGenerator:
"""This is a callable class that can be used in place of other
command generators if you don't want them to do anything.
The __call__ method for this class simply returns the thing
you instantiated it with.
Example usage:
env["DO_NOTHING"] = NullCmdGenerator
env["LINKCOM"] = "${DO_NOTHING('$LINK $SOURCES $TARGET')}"
"""
def __init__(self, cmd):
self.cmd = cmd
def __call__(self, target, source, env, for_signature=None):
return self.cmd
[docs]class Variable_Method_Caller:
"""A class for finding a construction variable on the stack and
calling one of its methods.
We use this to support "construction variables" in our string
eval()s that actually stand in for methods--specifically, use
of "RDirs" in call to _concat that should actually execute the
"TARGET.RDirs" method. (We used to support this by creating a little
"build dictionary" that mapped RDirs to the method, but this got in
the way of Memoizing construction environments, because we had to
create new environment objects to hold the variables.)
"""
def __init__(self, variable, method):
self.variable = variable
self.method = method
def __call__(self, *args, **kw):
try:
1 // 0
except ZeroDivisionError:
# Don't start iterating with the current stack-frame to
# prevent creating reference cycles (f_back is safe).
frame = sys.exc_info()[2].tb_frame.f_back
variable = self.variable
while frame:
if variable in frame.f_locals:
v = frame.f_locals[variable]
if v:
method = getattr(v, self.method)
return method(*args, **kw)
frame = frame.f_back
return None
[docs]def __libversionflags(env, version_var, flags_var):
"""
if version_var is not empty, returns env[flags_var], otherwise returns None
:param env:
:param version_var:
:param flags_var:
:return:
"""
try:
if env.subst('$' + version_var):
return env[flags_var]
except KeyError:
pass
return None
[docs]def __lib_either_version_flag(env, version_var1, version_var2, flags_var):
"""
if $version_var1 or $version_var2 is not empty, returns env[flags_var], otherwise returns None
:param env:
:param version_var1:
:param version_var2:
:param flags_var:
:return:
"""
try:
if env.subst('$' + version_var1) or env.subst('$' + version_var2):
return env[flags_var]
except KeyError:
pass
return None
ConstructionEnvironment = {
'BUILDERS': {},
'SCANNERS': [SCons.Tool.SourceFileScanner],
'CONFIGUREDIR': '#/.sconf_temp',
'CONFIGURELOG': '#/config.log',
'CPPSUFFIXES': SCons.Tool.CSuffixes,
'DSUFFIXES': SCons.Tool.DSuffixes,
'ENV': {},
'IDLSUFFIXES': SCons.Tool.IDLSuffixes,
'_concat': _concat,
'_defines': _defines,
'_stripixes': _stripixes,
'_LIBFLAGS': '${_concat(LIBLINKPREFIX, LIBS, LIBLINKSUFFIX, __env__)}',
'_LIBDIRFLAGS': '${_concat(LIBDIRPREFIX, LIBPATH, LIBDIRSUFFIX, __env__, RDirs, TARGET, SOURCE, affect_signature=False)}',
'_CPPINCFLAGS': '${_concat(INCPREFIX, CPPPATH, INCSUFFIX, __env__, RDirs, TARGET, SOURCE, affect_signature=False)}',
'_CPPDEFFLAGS': '${_defines(CPPDEFPREFIX, CPPDEFINES, CPPDEFSUFFIX, __env__, TARGET, SOURCE)}',
'__libversionflags': __libversionflags,
'__SHLIBVERSIONFLAGS': '${__libversionflags(__env__,"SHLIBVERSION","_SHLIBVERSIONFLAGS")}',
'__LDMODULEVERSIONFLAGS': '${__libversionflags(__env__,"LDMODULEVERSION","_LDMODULEVERSIONFLAGS")}',
'__DSHLIBVERSIONFLAGS': '${__libversionflags(__env__,"DSHLIBVERSION","_DSHLIBVERSIONFLAGS")}',
'__lib_either_version_flag': __lib_either_version_flag,
'TEMPFILE': NullCmdGenerator,
'TEMPFILEARGJOIN': ' ',
'TEMPFILEARGESCFUNC': SCons.Subst.quote_spaces,
'Dir': Variable_Method_Caller('TARGET', 'Dir'),
'Dirs': Variable_Method_Caller('TARGET', 'Dirs'),
'File': Variable_Method_Caller('TARGET', 'File'),
'RDirs': Variable_Method_Caller('TARGET', 'RDirs'),
}
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4: