install.py 文件源码

def CheckLoaderModule(dll_name):
    suffix = ""
    if is_debug_build: suffix = "_d"
    template = os.path.join(this_dir,
                            "PyISAPI_loader" + suffix + ".dll")
    if not os.path.isfile(template):
        raise ConfigurationError(
              "Template loader '%s' does not exist" % (template,))
    # We can't do a simple "is newer" check, as the DLL is specific to the
    # Python version.  So we check the date-time and size are identical,
    # and skip the copy in that case.
    src_stat = os.stat(template)
    try:
        dest_stat = os.stat(dll_name)
    except os.error:
        same = 0
    else:
        same = src_stat[stat.ST_SIZE]==dest_stat[stat.ST_SIZE] and \
               src_stat[stat.ST_MTIME]==dest_stat[stat.ST_MTIME]
    if not same:
        log(2, "Updating %s->%s" % (template, dll_name))
        shutil.copyfile(template, dll_name)
        shutil.copystat(template, dll_name)
    else:
        log(2, "%s is up to date." % (dll_name,))