| # |
| # 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. |
| """Example DAG demonstrating the usage of the BashOperator.""" |
| from __future__ import annotations |
| |
| import datetime |
| |
| import pendulum |
| |
| from airflow import DAG |
| from airflow.operators.bash import BashOperator |
| from airflow.operators.empty import EmptyOperator |
| |
| with DAG( |
| dag_id="example_bash_operator", |
| schedule="0 0 * * *", |
| start_date=pendulum.datetime(2021, 1, 1, tz="UTC"), |
| catchup=False, |
| dagrun_timeout=datetime.timedelta(minutes=60), |
| tags=["example", "example2"], |
| params={"example_key": "example_value"}, |
| ) as dag: |
| run_this_last = EmptyOperator( |
| task_id="run_this_last", |
| ) |
| |
| # [START howto_operator_bash] |
| run_this = BashOperator( |
| task_id="run_after_loop", |
| bash_command="echo 1", |
| ) |
| # [END howto_operator_bash] |
| |
| run_this >> run_this_last |
| |
| for i in range(3): |
| task = BashOperator( |
| task_id="runme_" + str(i), |
| bash_command='echo "{{ task_instance_key_str }}" && sleep 1', |
| ) |
| task >> run_this |
| |
| # [START howto_operator_bash_template] |
| also_run_this = BashOperator( |
| task_id="also_run_this", |
| bash_command='echo "ti_key={{ task_instance_key_str }}"', |
| ) |
| # [END howto_operator_bash_template] |
| also_run_this >> run_this_last |
| |
| # [START howto_operator_bash_skip] |
| this_will_skip = BashOperator( |
| task_id="this_will_skip", |
| bash_command='echo "hello world"; exit 99;', |
| dag=dag, |
| ) |
| # [END howto_operator_bash_skip] |
| this_will_skip >> run_this_last |
| |
| if __name__ == "__main__": |
| dag.test() |