Patch certbot/plugins/webroot.py to fix [Errno 30] Read-only file system error

webroot.py

def _create_challenge_dirs(self):
        path_map = self.conf("map")
        if not path_map:
            raise errors.PluginError(
                "Missing parts of webroot configuration; please set either "
                "--webroot-path and --domains, or --webroot-map. Run with "
                " --help webroot for examples.")
        for name, path in path_map.items():
            self.full_roots[name] = os.path.join(path, challenges.HTTP01.URI_ROOT_PATH)
            print(name, self.full_roots[name])
            logger.debug("Creating root challenges validation dir at %s",
                         self.full_roots[name])

            # Change the permissions to be writable (GH #1389)
            # Umask is used instead of chmod to ensure the client can also
            # run as non-root (GH #1795)
            old_umask = os.umask(0o022)
            try:
                stat_path = os.stat(path)
                # We ignore the last prefix in the next iteration,
                # as it does not correspond to a folder path ('/' or 'C:')
                print('get_refixes:', util.get_prefixes(self.full_roots[name]))
                print('get_refixes[-1]:', util.get_prefixes(self.full_roots[name])[:-1])
                print('sorted:', sorted(util.get_prefixes(self.full_roots[name])[:-1], key=len))
                for prefix in sorted(util.get_prefixes(self.full_roots[name])[:-1], key=len):
                    try:
                        # This is coupled with the "umask" call above because
                        # os.mkdir's "mode" parameter may not always work:
                        # https://docs.python.org/3/library/os.html#os.mkdir
                        print(prefix)
                        try:
                            res = os.stat(prefix)
                            continue
                        except:
                            os.mkdir(prefix, 0o0755)
                            self._created_dirs.append(prefix)
                            # Set owner as parent directory if possible
                            try:
                                os.chown(prefix, stat_path.st_uid, stat_path.st_gid)
                            except (OSError, AttributeError) as exception:
                                logger.info("Unable to change owner and uid of webroot directory")
                                logger.debug("Error was: %s", exception)
                    except OSError as exception:
                        if exception.errno not in (errno.EEXIST, errno.EISDIR):
                            raise errors.PluginError(
                                "Couldn't create root for {0} http-01 "
                                "challenge responses: {1}".format(name, exception))
            finally:
                os.umask(old_umask)