|
| 1 | +import os |
| 2 | +import yaml |
| 3 | +import logging |
| 4 | +from datetime import datetime, timedelta |
| 5 | +from pathlib import Path |
| 6 | + |
| 7 | +from airflow import DAG |
| 8 | +from airflow.operators.bash import BashOperator |
| 9 | + |
| 10 | +logger = logging.getLogger(__name__) |
| 11 | + |
| 12 | +DEFAULT_DAG_OPTS = { |
| 13 | + "catchup": False, |
| 14 | + "max_active_runs": 1, |
| 15 | + "default_args": { |
| 16 | + "owner": "airflow", |
| 17 | + "depends_on_past": False, |
| 18 | + "email_on_failure": False, |
| 19 | + "email_on_retry": False, |
| 20 | + "catchup": False, |
| 21 | + "retries": 1, |
| 22 | + "retry_delay": timedelta(minutes=5), |
| 23 | + "concurrency": 1, |
| 24 | + "start_date": datetime(1970, 1, 1, 0, 0, 0), |
| 25 | + } |
| 26 | +} |
| 27 | +DEFAULT_INTERVAL = "*/15 * * * *" |
| 28 | + |
| 29 | +PROJECT_ROOT = os.getenv("MELTANO_PROJECT_ROOT", os.getcwd()) |
| 30 | +MELTANO_EXECUTABLE = ".meltano/run/bin" |
| 31 | +APPS_FILENAME = "apps.yml" |
| 32 | + |
| 33 | +apps_path = Path(PROJECT_ROOT).joinpath(APPS_FILENAME) |
| 34 | +apps_config = yaml.safe_load(apps_path.read_text()) |
| 35 | + |
| 36 | +schedules = apps_config.get("schedules", []) |
| 37 | + |
| 38 | +for schedule in schedules: |
| 39 | + name = schedule.get("name") |
| 40 | + |
| 41 | + if not name: |
| 42 | + logger.warning("Skipping app without a name") |
| 43 | + continue |
| 44 | + |
| 45 | + interval = schedule.get("interval", DEFAULT_INTERVAL) |
| 46 | + job = schedule.get("job", name) |
| 47 | + |
| 48 | + env = schedule.get("env", {}) |
| 49 | + env = {k: str(v) for k, v in env.items()} |
| 50 | + |
| 51 | + dag_id = name.replace("/", "--") |
| 52 | + with DAG(dag_id, schedule=interval, **DEFAULT_DAG_OPTS) as dag: |
| 53 | + cmd = f"{MELTANO_EXECUTABLE} run {job}" |
| 54 | + |
| 55 | + task = BashOperator( |
| 56 | + dag=dag, |
| 57 | + task_id="run", |
| 58 | + cwd=str(PROJECT_ROOT), |
| 59 | + bash_command=cmd, |
| 60 | + env=env, |
| 61 | + append_env=True, |
| 62 | + ) |
| 63 | + globals()[dag_id] = dag |
| 64 | + |
| 65 | + logger.info(f"Created DAG '{dag_id}': interval='{interval}', cmd='{cmd}', env={env}") |
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