Talk Python To Me #540: Modern Python monorepo with uv and prek
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Mar 13, 2026 Amogh Desai, senior software engineer working on Airflow core and monorepo tooling. Jarek Potiuk, Apache Airflow maintainer and packaging expert. They tour a million-line Python monorepo. They discuss modern packaging PEPs, uv workspaces and uv sync for isolated per-package environments. They explain prek as a workspace-aware replacement for pre-commit and symlink-based shared libraries for modular architecture.
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Monorepo Enables Modular Development At Scale
- Monorepos let many logically separate packages live in one repository while keeping isolated development and testing workflows.
- Jarek explains Airflow stores 100+ subpackages and over a million lines of Python but still treats pieces as separate distributions for development and releases.
Old Bash Scripts Replaced With Python Automation
- Jarek recounts earlier Airflow tooling relied on thousands of lines of bash scripts to manage splitting into distributions.
- He replaced those scripts with Python and modern tools, removing over 10,000 lines of bash and simplifying contributors' workflows.
Collaborate With Tool Maintainers To Shape Features
- Work with upstream tool authors when your project needs features rather than hacking brittle local solutions.
- Jarek describes collaborating with UV and Preck maintainers to shape workspaces and hooks that solved Airflow's needs.