95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
"""Elementary ops."""
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import os
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import subprocess
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from pathlib import Path
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from dagster import In, Nothing, OpExecutionContext, op
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from sqlalchemy import create_engine, text
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_DBT_DIR = Path(__file__).parents[2] / "dbt"
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def _elementary_schema_exists() -> bool:
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url = "postgresql://{user}:{password}@{host}:{port}/{dbname}".format(
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user=os.environ["POSTGRES_USER"],
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password=os.environ["POSTGRES_PASSWORD"],
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host=os.environ.get("POSTGRES_HOST", "localhost"),
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port=os.environ.get("POSTGRES_PORT", "5432"),
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dbname=os.environ["POSTGRES_DB"],
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)
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engine = create_engine(
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url,
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pool_pre_ping=True,
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connect_args={"connect_timeout": 10},
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)
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from data_platform.resources import _retry_on_operational_error
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def _query():
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with engine.connect() as conn:
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return bool(
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conn.execute(
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text(
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"SELECT 1 FROM information_schema.schemata WHERE schema_name = 'elementary'"
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)
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).scalar()
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)
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return _retry_on_operational_error(_query)
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@op
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def elementary_run_models(context: OpExecutionContext) -> None:
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"""Run Elementary dbt models only if the elementary schema does not exist yet."""
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if _elementary_schema_exists():
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context.log.info("Elementary schema already exists, skipping model run.")
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return
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context.log.info("Elementary schema not found, running dbt models.")
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cmd = [
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"dbt",
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"run",
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"--select",
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"elementary",
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"--profiles-dir",
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str(_DBT_DIR),
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"--project-dir",
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str(_DBT_DIR),
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]
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context.log.info(f"Running: {' '.join(cmd)}")
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result = subprocess.run(cmd, capture_output=True, text=True)
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if result.stdout:
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context.log.info(result.stdout)
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if result.stderr:
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context.log.warning(result.stderr)
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if result.returncode != 0:
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raise Exception(f"dbt run elementary failed with exit code {result.returncode}")
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@op(ins={"after": In(Nothing)})
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def elementary_generate_report(context: OpExecutionContext) -> None:
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"""Run edr report to regenerate the Elementary HTML report."""
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report_path = (
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Path(__file__).parents[2] / "dbt" / "edr_target" / "elementary_report.html"
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)
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cmd = [
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"edr",
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"report",
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"--profiles-dir",
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str(_DBT_DIR),
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"--project-dir",
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str(_DBT_DIR),
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"--file-path",
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str(report_path),
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]
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context.log.info(f"Running: {' '.join(cmd)}")
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result = subprocess.run(cmd, capture_output=True, text=True)
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if result.stdout:
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context.log.info(result.stdout)
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if result.stderr:
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context.log.warning(result.stderr)
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if result.returncode != 0:
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raise Exception(f"edr report failed with exit code {result.returncode}")
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context.log.info("Elementary report generated successfully.")
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