lean-build

Automate Lake builds for Lean 4 projects by applying targeted module builds, cache management, and environment validation to create reproducible, CI-ready workflows. It validates changes using lake env lean and lake build commands to ensure CI parity.

Validating Lean 4 changes before CI involves running lake env lean for environment checks and lake build <Module> for targeted compilation. This provides CI-quality validation locally to catch errors early and maintain reproducibility.

Yes, you can use lake exe cache get to manage build artifacts in Mathlib-style projects. It fetches cached build outputs to speed up compilation, while lake clean removes artifacts to maintain CI parity and a reproducible environment.

Yes, this workflow supports targeted module builds in Lake-managed repositories using lake build <Module>. It allows you to compile specific modules rather than the entire project for faster, more efficient local validation.

A Lean 4 CI build failing locally but passing in the pipeline often indicates stale cache or environment differences. Running lake clean and lake exe cache get ensures local CI parity and reproducible validation.