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__init__.py

import time
start_time=time.time()
import os
import os.path
import random
import string
import sys
import traceback
import SCons.Debug
import SCons.Defaults
import SCons.Environment
import SCons.Errors
import SCons.Job
import SCons.Node
import SCons.Node.FS
from SCons.Optik import OptionParser, SUPPRESS_HELP, OptionValueError
import SCons.Script.SConscript
import SCons.Sig
import SCons.Taskmaster
import SCons.Util
import SCons.Warnings
import __builtin__
try:
    __builtin__.zip
except AttributeError:
    def zip(l1, l2):
        result=[]
        for i in xrange(len(l1)):
           result.append((l1[i], l2[i]))
        return result
    __builtin__.zip=zip
display=SCons.Util.display
progress_display=SCons.Util.DisplayEngine()
00034 class BuildTask(SCons.Taskmaster.Task):
    def display(self, message):
        display('scons: ' + message)
    def execute(self):
        target=self.targets[0]
        if target.get_state()==SCons.Node.up_to_date:
            if self.top and target.has_builder():
                display("scons: `%s' is up to date." % str(self.node))
        elif target.has_builder() and not hasattr(target.builder, 'status'):
            if print_time:
                start_time=time.time()
            SCons.Taskmaster.Task.execute(self)
            if print_time:
                finish_time=time.time()
                global command_time
                command_time=command_time+finish_time-start_time
                print "Command execution time: %f seconds"%(finish_time-start_time)
    def do_failed(self, status=2):
        global exit_status
        if ignore_errors:
            SCons.Taskmaster.Task.executed(self)
        elif keep_going_on_error:
            SCons.Taskmaster.Task.fail_continue(self)
            exit_status=status
        else:
            SCons.Taskmaster.Task.fail_stop(self)
            exit_status=status
            
    def executed(self):
        t=self.targets[0]
        if self.top and not t.has_builder() and not t.side_effect:
            if not t.exists():
                sys.stderr.write("scons: *** Do not know how to make target `%s'." % t)
                if not keep_going_on_error:
                    sys.stderr.write("  Stop.")
                sys.stderr.write("\n")
                self.do_failed()
            else:
                print "scons: Nothing to be done for `%s'." % t
                SCons.Taskmaster.Task.executed(self)
        else:
            SCons.Taskmaster.Task.executed(self)
        if print_tree and self.top:
            print
            print SCons.Util.render_tree(self.targets[0], get_all_children)
        if print_dtree and self.top:
            print
            print SCons.Util.render_tree(self.targets[0], get_derived_children)
        if print_includes and self.top:
            t=self.targets[0]
            tree=t.render_include_tree()
            if tree:
                print
                print tree
    def failed(self):
        status=2
        t, e=self.exc_info()[:2]
        tb=None
        if t is None:
            t, e=sys.exc_info()[:2]
        if t==SCons.Errors.BuildError:
            sys.stderr.write("scons: *** [%s] %s\n" % (e.node, e.errstr))
            if e.errstr=='Exception':
                traceback.print_exception(e.args[0], e.args[1], e.args[2])
        elif t==SCons.Errors.ExplicitExit:
            status=e.status
            sys.stderr.write("scons: *** [%s] Explicit exit, status %s\n" % (e.node, e.status))
        else:
            if e is None:
                e=t
            s=str(e)
            if t==SCons.Errors.StopError and not keep_going_on_error:
                s=s + '  Stop.'
            sys.stderr.write("scons: *** %s\n" % s)
            if tb:
                sys.stderr.write("scons: internal stack trace:\n")
                traceback.print_tb(tb, file=sys.stderr)
        self.do_failed(status)
        self.exc_clear()
    def make_ready(self):
        SCons.Taskmaster.Task.make_ready(self)
        if self.out_of_date and print_explanations:
            explanation=self.out_of_date[0].explain()
            if explanation:
                sys.stdout.write("scons: " + explanation)
00119 class CleanTask(SCons.Taskmaster.Task):
    def show(self):
        if (self.targets[0].has_builder() or self.targets[0].side_effect) \
           and not os.path.isdir(str(self.targets[0])):
            display("Removed " + str(self.targets[0]))
        if SCons.Environment.CleanTargets.has_key(self.targets[0]):
            files=SCons.Environment.CleanTargets[self.targets[0]]
            for f in files:
                SCons.Util.fs_delete(str(f), 0)
    def remove(self):
        if self.targets[0].has_builder() or self.targets[0].side_effect:
            for t in self.targets:
                try:
                    removed=t.remove()
                except OSError, e:
                    print "scons: Could not remove '%s':" % str(t), e.strerror
                else:
                    if removed:
                        display("Removed " + str(t))
        if SCons.Environment.CleanTargets.has_key(self.targets[0]):
            files=SCons.Environment.CleanTargets[self.targets[0]]
            for f in files:
                SCons.Util.fs_delete(str(f))
    execute=remove
    make_ready=SCons.Taskmaster.Task.make_ready_all
    def prepare(self):
        pass
00146 class QuestionTask(SCons.Taskmaster.Task):
    def prepare(self):
        pass
    
    def execute(self):
        if self.targets[0].get_state() != SCons.Node.up_to_date:
            global exit_status
            exit_status=1
            self.tm.stop()
    def executed(self):
        pass
keep_going_on_error=0
print_count=0
print_dtree=0
print_explanations=0
print_includes=0
print_objects=0
print_time=0
print_tree=0
memory_stats=None
ignore_errors=0
sconscript_time=0
command_time=0
exit_status=0
profiling=0
repositories=[]
num_jobs=1
00173 class PrintHelp(Exception):
    pass
def get_all_children(node): return node.all_children(None)
def get_derived_children(node):
    children=node.all_children(None)
    return filter(lambda x: x.has_builder(), children)
def _scons_syntax_error(e):
    etype, value, tb=sys.exc_info()
    lines=traceback.format_exception_only(etype, value)
    for line in lines:
        sys.stderr.write(line+'\n')
    sys.exit(2)
def find_deepest_user_frame(tb):
    
    tb.reverse()
    for frame in tb:
        filename=frame[0]
        if string.find(filename, os.sep+'SCons'+os.sep)==-1:
            return frame
    return tb[0]
def _scons_user_error(e):
    etype, value, tb=sys.exc_info()
    filename, lineno, routine, dummy=find_deepest_user_frame(traceback.extract_tb(tb))
    sys.stderr.write("\nscons: *** %s\n" % value)
    sys.stderr.write('File "%s", line %d, in %s\n' % (filename, lineno, routine))
    sys.exit(2)
def _scons_user_warning(e):
    etype, value, tb=sys.exc_info()
    filename, lineno, routine, dummy=find_deepest_user_frame(traceback.extract_tb(tb))
    sys.stderr.write("\nscons: warning: %s\n" % e)
    sys.stderr.write('File "%s", line %d, in %s\n' % (filename, lineno, routine))
def _scons_internal_warning(e):
    filename, lineno, routine, dummy=find_deepest_user_frame(traceback.extract_stack())
    sys.stderr.write("\nscons: warning: %s\n" % e[0])
    sys.stderr.write('File "%s", line %d, in %s\n' % (filename, lineno, routine))
def _scons_internal_error():
    print 'internal error'
    traceback.print_exc()
    sys.exit(2)
def _varargs(option, parser):
    value=None
    if parser.rargs:
        arg=parser.rargs[0]
        if arg[0] != "-":
            value=arg
            del parser.rargs[0]
    return value
def _setup_warn(arg):
    elems=string.split(string.lower(arg), '-')
    enable=1
    if elems[0]=='no':
        enable=0
        del elems[0]
    if len(elems)==1 and elems[0]=='all':
        class_name="Warning"
    else:
        def _capitalize(s):
            if s[:5]=="scons":
                return "SCons" + s[5:]
            else:
                return string.capitalize(s)
        class_name=string.join(map(_capitalize, elems), '') + "Warning"
    try:
        clazz=getattr(SCons.Warnings, class_name)
    except AttributeError:
        sys.stderr.write("No warning type: '%s'\n" % arg)
    else:
        if enable:
            SCons.Warnings.enableWarningClass(clazz)
        else:
            SCons.Warnings.suppressWarningClass(clazz)
def _SConstruct_exists(dirname=''):
    global repositories
    for file in ['SConstruct', 'Sconstruct', 'sconstruct']:
        sfile=os.path.join(dirname, file)
        if os.path.isfile(sfile):
            return sfile
        if not os.path.isabs(sfile):
            for rep in repositories:
                if os.path.isfile(os.path.join(rep, sfile)):
                    return sfile
    return None
def _set_globals(options):
    global repositories, keep_going_on_error, ignore_errors
    global print_count, print_dtree
    global print_explanations, print_includes
    global print_objects, print_time, print_tree
    global memory_outf, memory_stats
    if options.repository:
        repositories.extend(options.repository)
    keep_going_on_error=options.keep_going
    try:
        if options.debug:
            if options.debug=="count":
                print_count=1
            elif options.debug=="dtree":
                print_dtree=1
            elif options.debug=="explain":
                print_explanations=1
            elif options.debug=="includes":
                print_includes=1
            elif options.debug=="memory":
                memory_stats=[]
                memory_outf=sys.stdout
            elif options.debug=="objects":
                print_objects=1
            elif options.debug=="presub":
                SCons.Action.print_actions_presub=1
            elif options.debug=="time":
                print_time=1
            elif options.debug=="tree":
                print_tree=1
    except AttributeError:
        pass
    ignore_errors=options.ignore_errors
def _create_path(plist):
    path='.'
    for d in plist:
        if os.path.isabs(d):
            path=d
        else:
            path=path + '/' + d
    return path
00296 class OptParser(OptionParser):
    def __init__(self):
        import __main__
        import SCons
        parts=["SCons by Steven Knight et al.:\n"]
        try:
            parts.append("\tscript: v%s.%s, %s, by %s on %s\n" % (__main__.__version__,
                                                                  __main__.__build__,
                                                                  __main__.__date__,
                                                                  __main__.__developer__,
                                                                  __main__.__buildsys__))
        except KeyboardInterrupt:
            raise
        except:
            pass 
        parts.append("\tengine: v%s.%s, %s, by %s on %s\n" % (SCons.__version__,
                                                              SCons.__build__,
                                                              SCons.__date__,
                                                              SCons.__developer__,
                                                              SCons.__buildsys__))
        parts.append("Copyright (c) 2001, 2002, 2003, 2004 The SCons Foundation")
        OptionParser.__init__(self, version=string.join(parts, ''),
                              usage="usage: scons [OPTION] [TARGET] ...")
        def opt_ignore(option, opt, value, parser):
            sys.stderr.write("Warning:  ignoring %s option\n" % opt)
        self.add_option("-b", "-m", "-S", "-t", "--no-keep-going", "--stop",
                        "--touch", action="callback", callback=opt_ignore,
                        help="Ignored for compatibility.")
        self.add_option('-c', '--clean', '--remove', action="store_true",
                        dest="clean",
                        help="Remove specified targets and dependencies.")
        self.add_option('-C', '--directory', type="string", action="append",
                        metavar="DIR",
                        help="Change to DIR before doing anything.")
        self.add_option('--cache-disable', '--no-cache',
                        action="store_true", dest='cache_disable', default=0,
                        help="Do not retrieve built targets from CacheDir.")
        self.add_option('--cache-force', '--cache-populate',
                        action="store_true", dest='cache_force', default=0,
                        help="Copy already-built targets into the CacheDir.")
        self.add_option('--cache-show',
                        action="store_true", dest='cache_show', default=0,
                        help="Print build actions for files from CacheDir.")
        def opt_not_yet(option, opt, value, parser):
            sys.stderr.write("Warning:  the %s option is not yet implemented\n" % opt)
            sys.exit(0)
        self.add_option('-d', action="callback",
                        callback=opt_not_yet,
                        help="Print file dependency information.")
        
        self.add_option('-D', action="store_const", const=2, dest="climb_up",
                        help="Search up directory tree for SConstruct,       "
                             "build all Default() targets.")
        debug_options=["count", "dtree", "explain",
                         "includes", "memory", "objects",
                         "pdb", "presub", "time", "tree"]
        def opt_debug(option, opt, value, parser, debug_options=debug_options):
            if value in debug_options:
                parser.values.debug=value
            else:
                raise OptionValueError("Warning:  %s is not a valid debug type" % value)
        self.add_option('--debug', action="callback", type="string",
                        callback=opt_debug, nargs=1, dest="debug",
                        metavar="TYPE",
                        help="Print various types of debugging information: "
                             "%s." % string.join(debug_options, ", "))
        def opt_duplicate(option, opt, value, parser):
            if not value in SCons.Node.FS.Valid_Duplicates:
                raise OptionValueError("`%s' is not a valid duplication style." % value)
            parser.values.duplicate=value
            SCons.Node.FS.set_duplicate(value)
        self.add_option('--duplicate', action="callback", type="string",
                        callback=opt_duplicate, nargs=1, dest="duplicate",
                        help="Set the preferred duplication methods. Must be one of "
                        + string.join(SCons.Node.FS.Valid_Duplicates, ", "))
        self.add_option('-f', '--file', '--makefile', '--sconstruct',
                        action="append", nargs=1,
                        help="Read FILE as the top-level SConstruct file.")
        self.add_option('-h', '--help', action="store_true", default=0,
                        dest="help_msg",
                        help="Print defined help message, or this one.")
        self.add_option("-H", "--help-options",
                        action="help",
                        help="Print this message and exit.")
        self.add_option('-i', '--ignore-errors', action="store_true",
                        default=0, dest='ignore_errors',
                        help="Ignore errors from build actions.")
        self.add_option('-I', '--include-dir', action="append",
                        dest='include_dir', metavar="DIR",
                        help="Search DIR for imported Python modules.")
        self.add_option('--implicit-cache', action="store_true",
                        dest='implicit_cache',
                        help="Cache implicit dependencies")
        self.add_option('--implicit-deps-changed', action="store_true",
                        default=0, dest='implicit_deps_changed',
                        help="Ignore cached implicit dependencies.")
        self.add_option('--implicit-deps-unchanged', action="store_true",
                        default=0, dest='implicit_deps_unchanged',
                        help="Ignore changes in implicit dependencies.")
        def opt_j(option, opt, value, parser):
            value=int(value)
            parser.values.num_jobs=value
        self.add_option('-j', '--jobs', action="callback", type="int",
                        callback=opt_j, metavar="N",
                        help="Allow N jobs at once.")
        self.add_option('-k', '--keep-going', action="store_true", default=0,
                        dest='keep_going',
                        help="Keep going when a target can't be made.")
        self.add_option('--max-drift', type="int", action="store",
                        dest='max_drift', metavar="N",
                        help="Set maximum system clock drift to N seconds.")
        self.add_option('-n', '--no-exec', '--just-print', '--dry-run',
                        '--recon', action="store_true", dest='noexec',
                        default=0, help="Don't build; just print commands.")
        def opt_profile(option, opt, value, parser):
            global profiling
            if not profiling:
                profiling=1
                import profile
                profile.run('SCons.Script.main()', value)
                sys.exit(exit_status)
        self.add_option('--profile', nargs=1, action="callback",
                        callback=opt_profile, type="string", dest="profile",
                        metavar="FILE",
                        help="Profile SCons and put results in FILE.")
        self.add_option('-q', '--question', action="store_true", default=0,
                        help="Don't build; exit status says if up to date.")
        self.add_option('-Q', dest='no_progress', action="store_true",
                        default=0,
                        help="Suppress \"Reading/Building\" progress messages.")
        self.add_option('--random', dest="random", action="store_true",
                        default=0, help="Build dependencies in random order.")
        self.add_option('-s', '--silent', '--quiet', action="store_true",
                        default=0, help="Don't print commands.")
        self.add_option('-u', '--up', '--search-up', action="store_const",
                        dest="climb_up", default=0, const=1,
                        help="Search up directory tree for SConstruct,       "
                             "build targets at or below current directory.")
        self.add_option('-U', action="store_const", dest="climb_up",
                        default=0, const=3,
                        help="Search up directory tree for SConstruct,       "
                             "build Default() targets from local SConscript.")
        self.add_option("-v", "--version",
                        action="version",
                        help="Print the SCons version number and exit.")
        self.add_option('--warn', '--warning', nargs=1, action="store",
                        metavar="WARNING-SPEC",
                        help="Enable or disable warnings.")
        self.add_option('-Y', '--repository', nargs=1, action="append",
                        help="Search REPOSITORY for source and target files.")
        self.add_option('-e', '--environment-overrides', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('-l', '--load-average', '--max-load', action="callback",
                        callback=opt_not_yet, type="int", dest="load_average",
                        help=SUPPRESS_HELP)
        self.add_option('--list-derived', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('--list-actions', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('--list-where', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('-o', '--old-file', '--assume-old', action="callback",
                        callback=opt_not_yet, type="string", dest="old_file",
                        help=SUPPRESS_HELP)
        self.add_option('--override', action="callback", dest="override",
                        callback=opt_not_yet, type="string",
                        help=SUPPRESS_HELP)
        self.add_option('-p', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('-r', '-R', '--no-builtin-rules',
                        '--no-builtin-variables', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('-w', '--print-directory', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('--no-print-directory', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
        self.add_option('--write-filenames', action="callback",
                        callback=opt_not_yet, type="string", dest="write_filenames",
                        help=SUPPRESS_HELP)
        self.add_option('-W', '--what-if', '--new-file', '--assume-new',
                        dest="new_file",
                        action="callback", callback=opt_not_yet, type="string",
                        help=SUPPRESS_HELP)
        self.add_option('--warn-undefined-variables', action="callback",
                        callback=opt_not_yet,
                        help=SUPPRESS_HELP)
    def parse_args(self, args=None, values=None):
        opt, arglist=OptionParser.parse_args(self, args, values)
        if opt.implicit_deps_changed or opt.implicit_deps_unchanged:
            opt.implicit_cache=1
        return opt, arglist
00495 class SConscriptSettableOptions:
    def __init__(self, options):
        self.options=options
        self.settable={'num_jobs':1,
                         'max_drift':SCons.Sig.default_max_drift,
                         'implicit_cache':0,
                         'clean':0,
                         'duplicate':'hard-soft-copy'}
    def get(self, name):
        if not self.settable.has_key(name):
            raise SCons.Error.UserError, "This option is not settable from a SConscript file: %s"%name
        if hasattr(self.options, name) and getattr(self.options, name) is not None:
            return getattr(self.options, name)
        else:
            return self.settable[name]
    def set(self, name, value):
        if not self.settable.has_key(name):
            raise SCons.Error.UserError, "This option is not settable from a SConscript file: %s"%name
        if name=='num_jobs':
            try:
                value=int(value)
                if value < 1:
                    raise ValueError
            except ValueError:
                raise SCons.Errors.UserError, "A positive integer is required: %s"%repr(value)
        elif name=='max_drift':
            try:
                value=int(value)
            except ValueError:
                raise SCons.Errors.UserError, "An integer is required: %s"%repr(value)
        elif name=='duplicate':
            try:
                value=str(value)
            except ValueError:
                raise SCons.Errors.UserError, "A string is required: %s"%repr(value)
            if not value in SCons.Node.FS.Valid_Duplicates:
                raise SCons.Errors.UserError, "Not a valid duplication style: %s" % value
            SCons.Node.FS.set_duplicate(value)
        self.settable[name]=value
    
def _main(args, parser):
    targets=[]
    fs=SCons.Node.FS.default_fs
    SCons.Warnings._warningOut=_scons_internal_warning
    SCons.Warnings.enableWarningClass(SCons.Warnings.CorruptSConsignWarning)
    SCons.Warnings.enableWarningClass(SCons.Warnings.DeprecatedWarning)
    SCons.Warnings.enableWarningClass(SCons.Warnings.DuplicateEnvironmentWarning)
    SCons.Warnings.enableWarningClass(SCons.Warnings.MissingSConscriptWarning)
    SCons.Warnings.enableWarningClass(SCons.Warnings.NoParallelSupportWarning)
    SCons.Warnings.enableWarningClass(SCons.Warnings.MisleadingKeywordsWarning)
    global ssoptions
    ssoptions=SConscriptSettableOptions(options)
    if options.help_msg:
        def raisePrintHelp(text):
            raise PrintHelp, text
        SCons.Script.SConscript.HelpFunction=raisePrintHelp
    _set_globals(options)
    SCons.Node.implicit_cache=options.implicit_cache
    SCons.Node.implicit_deps_changed=options.implicit_deps_changed
    SCons.Node.implicit_deps_unchanged=options.implicit_deps_unchanged
    if options.warn:
        _setup_warn(options.warn)
    if options.noexec:
        SCons.SConf.dryrun=1
        SCons.Action.execute_actions=None
        CleanTask.execute=CleanTask.show
    if options.question:
        SCons.SConf.dryrun=1
    if options.no_progress or options.silent:
        progress_display.set_mode(0)
    if options.silent:
        display.set_mode(0)
    if options.silent:
        SCons.Action.print_actions=None
    if options.cache_disable:
        def disable(self): pass
        fs.CacheDir=disable
    if options.cache_force:
        fs.cache_force=1
    if options.cache_show:
        fs.cache_show=1
    if options.directory:
        cdir=_create_path(options.directory)
        try:
            os.chdir(cdir)
        except OSError:
            sys.stderr.write("Could not change directory to %s\n" % cdir)
    xmit_args=[]
    for a in args:
        if '=' in a:
            xmit_args.append(a)
        else:
            targets.append(a)
    SCons.Script.SConscript._scons_add_args(xmit_args)
    SCons.Script.SConscript._scons_add_targets(targets)
    target_top=None
    if options.climb_up:
        target_top='.'
        script_dir=os.getcwd()
        while script_dir and not _SConstruct_exists(script_dir):
            script_dir, last_part=os.path.split(script_dir)
            if last_part:
                target_top=os.path.join(last_part, target_top)
            else:
                script_dir=''
        if script_dir:
            display("scons: Entering directory `%s'" % script_dir)
            os.chdir(script_dir)
        else:
            raise SCons.Errors.UserError, "No SConstruct file found."
    fs.set_toplevel_dir(os.getcwd())
    scripts=[]
    if options.file:
        scripts.extend(options.file)
    if not scripts:
        sfile=_SConstruct_exists()
        if sfile:
            scripts.append(sfile)
    if options.help_msg:
        if not scripts:
            parser.print_help()
            sys.exit(0)
        SCons.Script.SConscript.print_help=1
    if not scripts:
        raise SCons.Errors.UserError, "No SConstruct file found."
    if scripts[0]=="-":
        d=fs.getcwd()
    else:
        d=fs.File(scripts[0]).dir
    fs.set_SConstruct_dir(d)
    class Unbuffered:
        def __init__(self, file):
            self.file=file
        def write(self, arg):
            self.file.write(arg)
            self.file.flush()
        def __getattr__(self, attr):
            return getattr(self.file, attr)
    sys.stdout=Unbuffered(sys.stdout)
    if options.include_dir:
        sys.path=options.include_dir + sys.path
    global repositories
    for rep in repositories:
        fs.Repository(rep)
    if not memory_stats is None: memory_stats.append(SCons.Debug.memory())
    progress_display("scons: Reading SConscript files ...")
    try:
        start_time=time.time()
        try:
            for script in scripts:
                SCons.Script.SConscript._SConscript(fs, script)
        except SCons.Errors.StopError, e:
            global exit_status
            sys.stderr.write("scons: *** %s\n" % e)
            exit_status=2
            sys.exit(exit_status)
        global sconscript_time
        sconscript_time=time.time() - start_time
    except PrintHelp, text:
        progress_display("scons: done reading SConscript files.")
        print text
        print "Use scons -H for help about command-line options."
        sys.exit(0)
    progress_display("scons: done reading SConscript files.")
    SCons.Node.FS.save_strings(1)
    if not memory_stats is None: memory_stats.append(SCons.Debug.memory())
    fs.chdir(fs.Top)
    if options.help_msg:
        parser.print_help(sys.stdout)
        sys.exit(0)
    SCons.Node.implicit_cache=ssoptions.get('implicit_cache')
    SCons.Node.FS.set_duplicate(ssoptions.get('duplicate'))
    lookup_top=None
    if targets:
        if target_top:
            lookup_top=fs.Dir(target_top)
            target_top=None
    else:
        d=None
        if target_top:
            if options.climb_up==1:
                target_top=fs.Dir(target_top)
                lookup_top=target_top
            elif options.climb_up==2:
                target_top=None
                lookup_top=None
            elif options.climb_up==3:
                target_top=fs.Dir(target_top)
                def check_dir(x, target_top=target_top):
                    if hasattr(x, 'cwd') and not x.cwd is None:
                        cwd=x.cwd.srcnode()
                        return cwd==target_top
                    else:
                        return 1                
                d=filter(check_dir, SCons.Script.SConscript.DefaultTargets)
                SCons.Script.SConscript.DefaultTargets[:]=d
                target_top=None
                lookup_top=None
        if SCons.Script.SConscript.DefaultCalled:
            targets=SCons.Script.SConscript.DefaultTargets
        else:
            if d is None:
                d=[fs.Dir('.')]
            targets=d
    if not targets:
        sys.stderr.write("scons: *** No targets specified and no Default() targets found.  Stop.\n")
        sys.exit(2)
    def Entry(x, ltop=lookup_top, ttop=target_top, fs=fs):
        if isinstance(x, SCons.Node.Node):
            node=x
        else:
            node=SCons.Node.Alias.default_ans.lookup(x)
            if node is None:
                node=fs.Entry(x, directory=ltop, create=1)
        if ttop and not node.is_under(ttop):
            if isinstance(node, SCons.Node.FS.Dir) and ttop.is_under(node):
                node=ttop
            else:
                node=None
        return node
    nodes=filter(lambda x: x is not None, map(Entry, targets))
    task_class=BuildTask
    opening_message="Building targets ..."
    closing_message="done building targets."
    failure_message="building terminated because of errors."
    if options.question:
        task_class=QuestionTask
    try:
        if ssoptions.get('clean'):
            task_class=CleanTask
            opening_message="Cleaning targets ..."
            closing_message="done cleaning targets."
            failure_message="cleaning terminated because of errors."
    except AttributeError:
        pass
    SCons.Environment.CalculatorArgs['max_drift']=ssoptions.get('max_drift')
    if options.random:
        def order(dependencies):
            d=dependencies
            for i in xrange(len(d)-1, 0, -1):
                j=int(random.random() * (i+1))
                d[i], d[j]=d[j], d[i]
            return d
    else:
        def order(dependencies):
            return dependencies
    progress_display("scons: " + opening_message)
    taskmaster=SCons.Taskmaster.Taskmaster(nodes, task_class, order)
    nj=ssoptions.get('num_jobs')
    jobs=SCons.Job.Jobs(nj, taskmaster)
    if nj > 1 and jobs.num_jobs==1:
        msg="parallel builds are unsupported by this version of Python;\n" + \
              "\tignoring -j or num_jobs option.\n"
        SCons.Warnings.warn(SCons.Warnings.NoParallelSupportWarning, msg)
    if not memory_stats is None: memory_stats.append(SCons.Debug.memory())
    try:
        jobs.run()
    finally:
        if exit_status:
            progress_display("scons: " + failure_message)
        else:
            progress_display("scons: " + closing_message)
        if not options.noexec:
            SCons.SConsign.write()
    if not memory_stats is None:
        memory_stats.append(SCons.Debug.memory())
        when=[
            'before SConscript files',
            'after SConscript files',
            'before building',
            'after building',
        ]
        for i in xrange(len(when)):
            memory_outf.write('Memory %s:  %d\n' % (when[i], memory_stats[i]))
    if print_count:
        SCons.Debug.countLoggedInstances('*')
    if print_objects:
        SCons.Debug.listLoggedInstances('*')
def _exec_main():
    all_args=sys.argv[1:]
    try:
        all_args=string.split(os.environ['SCONSFLAGS']) + all_args
    except KeyError:
            pass
    parser=OptParser()
    global options
    options, args=parser.parse_args(all_args)
    if options.debug=="pdb":
        import pdb
        pdb.Pdb().runcall(_main, args, parser)
    else:
        _main(args, parser)
def main():
    global exit_status
    try:
      _exec_main()
    except SystemExit, s:
        if s:
            exit_status=s
    except KeyboardInterrupt:
        print "Build interrupted."
        sys.exit(2)
    except SyntaxError, e:
        _scons_syntax_error(e)
    except SCons.Errors.InternalError:
        _scons_internal_error()
    except SCons.Errors.UserError, e:
        _scons_user_error(e)
    except SCons.Errors.ConfigureDryRunError, e:
        _scons_configure_dryrun_error(e)
    except:
        SCons.Script.SConscript.SConscript_exception()
        sys.exit(2)
    if print_time:
        total_time=time.time()-start_time
        scons_time=total_time-sconscript_time-command_time
        print "Total build time: %f seconds"%total_time
        print "Total SConscript file execution time: %f seconds"%sconscript_time
        print "Total SCons execution time: %f seconds"%scons_time
        print "Total command execution time: %f seconds"%command_time
    sys.exit(exit_status)

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