Dev.to
6/29/2026

The original title is "How we parse Apache Airflow DAGs without importing Airflow"
Original: How we parse Apache Airflow DAGs without importing Airflow
Short summary
Leoflow parses Apache Airflow DAGs without importing Airflow by using a structural shim that captures DAG structure at compile time, then executes real operators at runtime in task pods. This approach eliminates GIL overhead in the Go-based control plane, removes parse-time side effects, and avoids dependency hell while maintaining full operator fidelity.
- •Structural shim mimics Airflow API to capture DAG graphs without executing code
- •Go control plane stays fast and GIL-free; real operators run in isolated pod images
- •Provider operators captured as data (dotted path + kwargs) at compile, instantiated at runtime
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