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"""
Example usage of the TriggerDagRunOperator. This example holds 2 DAGs:
1. 1st DAG (example_trigger_controller_dag) holds a TriggerDagRunOperator, which will trigger the 2nd DAG
2. 2nd DAG (example_trigger_target_dag) which will be triggered by the TriggerDagRunOperator in the 1st DAG
"""

from __future__ import annotations

import pendulum

from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator
from airflow.operators.trigger_dagrun import TriggerDagRunOperator

with DAG(
    dag_id="example_trigger_controller_dag",
    start_date=pendulum.datetime(2021, 1, 1, tz="UTC"),
    catchup=False,
    schedule="@once",
    tags=["example"],
) as dag:
    trigger = TriggerDagRunOperator(
        task_id="test_trigger_dagrun",
        trigger_dag_id="example_trigger_target_dag",  # Ensure this equals the dag_id of the DAG to trigger
        conf={"message": "Hello World"},
    )

    local_task = BashOperator(
        task_id="local_task",
        bash_command='echo "Final step"'
    )

    trigger >> local_task
