SConscript.py 文件源码

def SConscript_exception(file=sys.stderr):
    """Print an exception stack trace just for the SConscript file(s).
    This will show users who have Python errors where the problem is,
    without cluttering the output with all of the internal calls leading
    up to where we exec the SConscript."""
    exc_type, exc_value, exc_tb = sys.exc_info()
    tb = exc_tb
    while tb and stack_bottom not in tb.tb_frame.f_locals:
        tb = tb.tb_next
    if not tb:
        # We did not find our exec statement, so this was actually a bug
        # in SCons itself.  Show the whole stack.
        tb = exc_tb
    stack = traceback.extract_tb(tb)
    try:
        type = exc_type.__name__
    except AttributeError:
        type = str(exc_type)
        if type[:11] == "exceptions.":
            type = type[11:]
    file.write('%s: %s:\n' % (type, exc_value))
    for fname, line, func, text in stack:
        file.write('  File "%s", line %d:\n' % (fname, line))
        file.write('    %s\n' % text)