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Diffstat (limited to 'src/engine/SCons/Defaults.py')
| -rw-r--r-- | src/engine/SCons/Defaults.py | 485 |
1 files changed, 485 insertions, 0 deletions
diff --git a/src/engine/SCons/Defaults.py b/src/engine/SCons/Defaults.py new file mode 100644 index 0000000..0ff0399 --- /dev/null +++ b/src/engine/SCons/Defaults.py @@ -0,0 +1,485 @@ +"""SCons.Defaults + +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. + +""" + +# +# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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/Defaults.py 4577 2009/12/27 19:44:43 scons" + + + +import os +import os.path +import errno +import shutil +import stat +import string +import time +import types +import sys + +import SCons.Action +import SCons.Builder +import SCons.CacheDir +import SCons.Environment +import SCons.PathList +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. +def _fetch_DefaultEnvironment(*args, **kw): + """ + Returns the already-created default construction environment. + """ + global _default_env + return _default_env + +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 = apply(SCons.Environment.Environment, args, kw) + if SCons.Util.md5: + _default_env.Decider('MD5') + else: + _default_env.Decider('timestamp-match') + 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. +def StaticObjectEmitter(target, source, env): + for tgt in target: + tgt.attributes.shared = None + return (target, source) + +def SharedObjectEmitter(target, source, env): + for tgt in target: + tgt.attributes.shared = 1 + return (target, source) + +def SharedFlagChecker(source, target, env): + same = env.subst('$STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME') + if same == '0' or same == '' or same == 'False': + for src in source: + try: + shared = src.attributes.shared + except AttributeError: + shared = None + if not shared: + raise SCons.Errors.UserError, "Source file: %s is static and is not compatible with shared target: %s" % (src, target[0]) + +SharedCheck = SCons.Action.Action(SharedFlagChecker, None) + +# Some people were using these variable name before we made +# SourceFileScanner part of the public interface. Don't break their +# SConscript files until we've given them some fair warning and a +# transition period. +CScan = SCons.Tool.CScanner +DScan = SCons.Tool.DScanner +LaTeXScan = SCons.Tool.LaTeXScanner +ObjSourceScan = SCons.Tool.SourceFileScanner +ProgScan = SCons.Tool.ProgramScanner + +# These aren't really tool scanners, so they don't quite belong with +# the rest of those in Tool/__init__.py, but I'm not sure where else +# they should go. Leave them here for now. +import SCons.Scanner.Dir +DirScanner = SCons.Scanner.Dir.DirScanner() +DirEntryScanner = SCons.Scanner.Dir.DirEntryScanner() + +# Actions for common languages. +CAction = SCons.Action.Action("$CCCOM", "$CCCOMSTR") +ShCAction = SCons.Action.Action("$SHCCCOM", "$SHCCCOMSTR") +CXXAction = SCons.Action.Action("$CXXCOM", "$CXXCOMSTR") +ShCXXAction = SCons.Action.Action("$SHCXXCOM", "$SHCXXCOMSTR") + +ASAction = SCons.Action.Action("$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 + +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 '[' + string.join(elem_strs, ', ') + ']' + else: + return '"' + str(dest) + '"' + +def chmod_func(dest, mode): + SCons.Node.FS.invalidate_node_memos(dest) + if not SCons.Util.is_List(dest): + dest = [dest] + for element in dest: + os.chmod(str(element), mode) + +def chmod_strfunc(dest, mode): + return 'Chmod(%s, 0%o)' % (get_paths_str(dest), mode) + +Chmod = ActionFactory(chmod_func, chmod_strfunc) + +def copy_func(dest, 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.isfile(src): + return shutil.copy2(src, dest) + else: + return shutil.copytree(src, dest, 1) + +Copy = ActionFactory(copy_func, + lambda dest, src: 'Copy("%s", "%s")' % (dest, src), + convert=str) + +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) + if not must_exist and not os.path.exists(entry): + continue + if not os.path.exists(entry) or os.path.isfile(entry): + os.unlink(entry) + continue + else: + shutil.rmtree(entry, 1) + continue + +def delete_strfunc(dest, must_exist=0): + return 'Delete(%s)' % get_paths_str(dest) + +Delete = ActionFactory(delete_func, delete_strfunc) + +def mkdir_func(dest): + SCons.Node.FS.invalidate_node_memos(dest) + if not SCons.Util.is_List(dest): + dest = [dest] + for entry in dest: + try: + os.makedirs(str(entry)) + except os.error, e: + p = str(entry) + if (e[0] == errno.EEXIST or (sys.platform=='win32' and e[0]==183)) \ + and os.path.isdir(str(entry)): + pass # not an error if already exists + else: + raise + +Mkdir = ActionFactory(mkdir_func, + lambda dir: 'Mkdir(%s)' % get_paths_str(dir)) + +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) + +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: + 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 + +def _concat(prefix, list, suffix, env, f=lambda x: x, target=None, source=None): + """ + Creates a new list from 'list' 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 list: + return list + + l = f(SCons.PathList.PathList(list).subst_path(env, target, source)) + if l is not None: + list = l + + return _concat_ixes(prefix, list, suffix, env) + +def _concat_ixes(prefix, list, suffix, env): + """ + Creates a new list from 'list' 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 list: + 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 + +def _stripixes(prefix, list, 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 elements 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 list: + return list + + 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 = map(env.subst, SCons.Util.flatten(stripprefixes)) + stripsuffixes = map(env.subst, SCons.Util.flatten(stripsuffixes)) + + stripped = [] + for l in SCons.PathList.PathList(list).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) + +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 SCons.Util.is_List(d) or type(d) is types.TupleType: + l.append(str(d[0]) + '=' + str(d[1])) + else: + l.append(str(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 = [] + keys = defs.keys() + keys.sort() + for k in keys: + v = defs[k] + if v is None: + l.append(str(k)) + else: + l.append(str(k) + '=' + str(v)) + else: + l = [str(defs)] + return l + +def _defines(prefix, defs, suffix, env, 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_path(processDefines(defs)), suffix, env) + +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 $TARGET')}" + """ + + def __init__(self, cmd): + self.cmd = cmd + + def __call__(self, target, source, env, for_signature=None): + return self.cmd + +class Variable_Method_Caller: + """A class for finding a construction variable on the stack and + calling one of its methods. + + We use this to support "construction variables" in our string + eval()s that actually stand in for methods--specifically, use + of "RDirs" in call to _concat that should actually execute the + "TARGET.RDirs" method. (We used to support this by creating a little + "build dictionary" that mapped RDirs to the method, but this got in + the way of Memoizing construction environments, because we had to + create new environment objects to hold the variables.) + """ + def __init__(self, variable, method): + self.variable = variable + self.method = method + def __call__(self, *args, **kw): + try: 1/0 + except ZeroDivisionError: + # Don't start iterating with the current stack-frame to + # prevent creating reference cycles (f_back is safe). + frame = sys.exc_info()[2].tb_frame.f_back + variable = self.variable + while frame: + if frame.f_locals.has_key(variable): + v = frame.f_locals[variable] + if v: + method = getattr(v, self.method) + return apply(method, args, kw) + frame = frame.f_back + return None + +ConstructionEnvironment = { + 'BUILDERS' : {}, + 'SCANNERS' : [], + 'CONFIGUREDIR' : '#/.sconf_temp', + 'CONFIGURELOG' : '#/config.log', + 'CPPSUFFIXES' : SCons.Tool.CSuffixes, + 'DSUFFIXES' : SCons.Tool.DSuffixes, + 'ENV' : {}, + 'IDLSUFFIXES' : SCons.Tool.IDLSuffixes, +# 'LATEXSUFFIXES' : SCons.Tool.LaTeXSuffixes, # moved to the TeX tools generate functions + '_concat' : _concat, + '_defines' : _defines, + '_stripixes' : _stripixes, + '_LIBFLAGS' : '${_concat(LIBLINKPREFIX, LIBS, LIBLINKSUFFIX, __env__)}', + '_LIBDIRFLAGS' : '$( ${_concat(LIBDIRPREFIX, LIBPATH, LIBDIRSUFFIX, __env__, RDirs, TARGET, SOURCE)} $)', + '_CPPINCFLAGS' : '$( ${_concat(INCPREFIX, CPPPATH, INCSUFFIX, __env__, RDirs, TARGET, SOURCE)} $)', + '_CPPDEFFLAGS' : '${_defines(CPPDEFPREFIX, CPPDEFINES, CPPDEFSUFFIX, __env__)}', + 'TEMPFILE' : NullCmdGenerator, + '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: |