jason810496 commented on code in PR #74037: URL: https://github.com/apache/airflow/pull/74037#discussion_r4183990692
########## task-sdk/src/airflow/sdk/coordinators/node/_dag_importer.py: ########## @@ -0,0 +1,62 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +"""The Dag importer that parses native TypeScript Dags from packed bundles.""" + +from __future__ import annotations + +from typing import TYPE_CHECKING, ClassVar, Final + +from airflow.sdk.coordinators._dag_importer import CoordinatorDagImporter +from airflow.sdk.coordinators.node._bundle_reader import ( + BUNDLE_SUFFIX, + has_bundle_layout_prefix, + read_bundle_entrypoint_source, +) +from airflow.sdk.importers.base import DagSourceCode + +if TYPE_CHECKING: + from airflow.sdk.importers.base import DagDefinition + +_NO_SOURCE: Final = "// Source code is not available: the bundle embeds no entrypoint source.\n" + + +class NodeDagImporter(CoordinatorDagImporter): + """ + Claim the native Dags of packed ``*.min.mjs`` TypeScript bundles. + + A :class:`~airflow.sdk.coordinators.node.NodeCoordinator` parses them. + """ + + coordinator_classpath: ClassVar[str] = "airflow.sdk.coordinators.node.NodeCoordinator" + artifact_suffix = BUNDLE_SUFFIX + supported_extensions = [".mjs"] + + def might_contain_dag(self, definition: DagDefinition, safe_mode: bool) -> bool: + # The header identifies a packed bundle rather than guessing at content, so safe_mode keeps it. + with definition.as_file() as path: + try: + return has_bundle_layout_prefix(path) + except OSError: + # Keep the file, so parsing it records why it cannot be read. + return True + + def get_source_code(self, definition: DagDefinition) -> DagSourceCode: + """Return the embedded entrypoint source of the bundle, or a notice when it embeds none.""" + with definition.as_file() as path: + source = read_bundle_entrypoint_source(path) + return DagSourceCode(source_code=source or _NO_SOURCE, language="typescript") Review Comment: I just checked the write path of the DagCode, and I found that we need to change the interface of the `DagImporter.get_source_code` to support the Dag-level based DagCode that we stored in the compiled artifact. https://github.com/apache/airflow/blob/f74a685978c1048e115c94abde445075089b3953/airflow-core/src/airflow/dag_processing/dagbag.py#L370-L376 I think we can follow-up on this feature without blocking this one and we still have sometime to change the interface. I imaged the interface will be like `dag_source_codes(definition: DagDefinition, * , dag_id: str | None = None)`? Additionally, the `DagBag.dag_source_codes` will become `dict[(str, str | None) , DagSourceCode]`. cc @dilnazanlid @uranusjr What do you think, thanks? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
