postgres.py 文件源码

def update_config(self, content, path):
        old_file = six.BytesIO()
        if files.exists(path, use_sudo=self.sudo):
            fab.get(remote_path=path, local_path=old_file, use_sudo=self.sudo)
        old_content = old_file.getvalue()
        need_update = content != old_content
        if need_update:
            fabricio.move_file(
                path_from=path,
                path_to=path + '.backup',
                sudo=self.sudo,
                ignore_errors=True,
            )
            fab.put(six.BytesIO(content), path, use_sudo=self.sudo, mode='0644')
            fabricio.log('{path} updated'.format(path=path))
        else:
            fabricio.log('{path} not changed'.format(path=path))
        return need_update