bootstrap.py 文件源码

def delete_stack_file(stackname):
    try:
        core.describe_stack(stackname) # triggers exception if NOT exists
        LOG.warning('stack %r still exists, refusing to delete stack files. delete active stack first.', stackname)
        return
    except BotoServerError as ex:
        if not ex.message.endswith('does not exist'):
            LOG.exception("unhandled exception attempting to confirm if stack %r exists", stackname)
            raise
    ext_list = [
        ".pem",
        ".pub",
        ".json",
        ".yaml", # yaml files are now deprecated
    ]
    paths = [join(config.STACK_DIR, stackname + ext) for ext in ext_list]
    paths = filter(os.path.exists, paths)

    def _unlink(path):
        os.unlink(path)
        return not os.path.exists(path)
    return dict(zip(paths, map(_unlink, paths)))