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"""
Example DAG using GoogleDriveToLocalOperator.
Using this operator requires the following additional scopes:
https://www.googleapis.com/auth/drive
"""
from __future__ import annotations
import logging
import os
from datetime import datetime
from pathlib import Path
from airflow.decorators import task
from airflow.models import Connection
from airflow.models.dag import DAG
from airflow.providers.google.cloud.operators.gcs import GCSCreateBucketOperator, GCSDeleteBucketOperator
from airflow.providers.google.cloud.transfers.gdrive_to_local import GoogleDriveToLocalOperator
from airflow.providers.google.cloud.transfers.local_to_gcs import LocalFilesystemToGCSOperator
from airflow.providers.google.suite.hooks.drive import GoogleDriveHook
from airflow.providers.google.suite.sensors.drive import GoogleDriveFileExistenceSensor
from airflow.providers.google.suite.transfers.gcs_to_gdrive import GCSToGoogleDriveOperator
from airflow.settings import Session, json
from airflow.utils.trigger_rule import TriggerRule
from providers.tests.system.google import DEFAULT_GCP_SYSTEM_TEST_PROJECT_ID
[docs]ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID", "default")
[docs]PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT") or DEFAULT_GCP_SYSTEM_TEST_PROJECT_ID
[docs]DAG_ID = "gdrive_to_local"
[docs]CONNECTION_ID = f"connection_{DAG_ID}_{ENV_ID}"
[docs]DRIVE_FILE_NAME = f"empty_{DAG_ID}_{ENV_ID}.txt".replace("-", "_")
[docs]OUTPUT_FILE = "out_file.txt"
[docs]BUCKET_NAME = f"bucket_{DAG_ID}_{ENV_ID}"
[docs]LOCAL_PATH = str(Path(__file__).parent / "resources" / FILE_NAME)
[docs]log = logging.getLogger(__name__)
with DAG(
DAG_ID,
start_date=datetime(2021, 1, 1),
schedule="@once",
catchup=False,
tags=["example", "gdrive"],
) as dag:
@task
[docs] def create_connection(connection_id: str):
conn = Connection(
conn_id=connection_id,
conn_type="google_cloud_platform",
)
conn_extra_json = json.dumps(
{
"scope": "https://www.googleapis.com/auth/drive,"
"https://www.googleapis.com/auth/cloud-platform"
}
)
conn.set_extra(conn_extra_json)
session = Session()
log.info("Removing connection %s if it exists", connection_id)
query = session.query(Connection).filter(Connection.conn_id == connection_id)
query.delete()
session.add(conn)
session.commit()
log.info("Connection created: '%s'", connection_id)
create_connection_task = create_connection(connection_id=CONNECTION_ID)
create_bucket = GCSCreateBucketOperator(
task_id="create_bucket", bucket_name=BUCKET_NAME, project_id=PROJECT_ID
)
upload_file = LocalFilesystemToGCSOperator(
task_id="upload_file",
src=LOCAL_PATH,
dst=FILE_NAME,
bucket=BUCKET_NAME,
)
copy_single_file = GCSToGoogleDriveOperator(
task_id="copy_single_file",
gcp_conn_id=CONNECTION_ID,
source_bucket=BUCKET_NAME,
source_object=FILE_NAME,
destination_object=DRIVE_FILE_NAME,
)
# [START detect_file]
detect_file = GoogleDriveFileExistenceSensor(
task_id="detect_file",
gcp_conn_id=CONNECTION_ID,
folder_id="",
file_name=DRIVE_FILE_NAME,
)
# [END detect_file]
# [START download_from_gdrive_to_local]
download_from_gdrive_to_local = GoogleDriveToLocalOperator(
task_id="download_from_gdrive_to_local",
gcp_conn_id=CONNECTION_ID,
folder_id="",
file_name=DRIVE_FILE_NAME,
output_file=OUTPUT_FILE,
)
# [END download_from_gdrive_to_local]
@task(trigger_rule=TriggerRule.ALL_DONE)
def remove_file_from_drive():
service = GoogleDriveHook(gcp_conn_id=CONNECTION_ID).get_conn()
response = service.files().list(q=f"name = '{DRIVE_FILE_NAME}'").execute()
if files := response["files"]:
file = files[0]
log.info("Deleting file {}...", file)
service.files().delete(fileId=file["id"])
log.info("Done.")
remove_file_from_drive_task = remove_file_from_drive()
delete_bucket = GCSDeleteBucketOperator(
task_id="delete_bucket", bucket_name=BUCKET_NAME, trigger_rule=TriggerRule.ALL_DONE
)
@task(task_id="delete_connection")
def delete_connection(connection_id: str) -> None:
session = Session()
log.info("Removing connection %s", connection_id)
query = session.query(Connection).filter(Connection.conn_id == connection_id)
query.delete()
session.commit()
delete_connection_task = delete_connection(connection_id=CONNECTION_ID)
(
# TEST SETUP
[create_bucket >> upload_file, create_connection_task]
>> copy_single_file
# TEST BODY
>> detect_file
>> download_from_gdrive_to_local
# TEST TEARDOWN
>> remove_file_from_drive_task
>> [delete_bucket, delete_connection_task]
)
from tests_common.test_utils.watcher import watcher
# This test needs watcher in order to properly mark success/failure
# when "tearDown" task with trigger rule is part of the DAG
list(dag.tasks) >> watcher()
from tests_common.test_utils.system_tests import get_test_run # noqa: E402
# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
[docs]test_run = get_test_run(dag)