# Copyright 2021 Google LLC

# Licensed 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

# https://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.

# [START composer_grouping]

from airflow import DAG

from airflow.operators.bash import BashOperator

from airflow.operators.dummy import DummyOperator

from airflow.utils.dates import days_ago

DAG_NAME = "all_tasks_in_one_dag"

args = {"owner": "airflow", "start_date": days_ago(1), "schedule_interval": "@once"}

with DAG(dag_id=DAG_NAME, default_args=args) as dag:

start = DummyOperator(task_id="start")

task_1 = BashOperator(task_id="op-1", bash_command=":", dag=dag)

task_2 = BashOperator(task_id="op-2", bash_command=":", dag=dag)

some_other_task = DummyOperator(task_id="some-other-task")

task_3 = BashOperator(task_id="op-3", bash_command=":", dag=dag)

task_4 = BashOperator(task_id="op-4", bash_command=":", dag=dag)

end = DummyOperator(task_id="end")

start >> [task_1, task_2] >> some_other_task >> [task_3, task_4] >> end

# [END composer_grouping]