Using pre-commit to keep uv.lock in sync

I often forget to uv sync after things like tweaking the version number in pyproject.toml. Then in CI the pipeline eventually fails as somewhere in setup there’s bound to be uv sync --locked which then fails as the lock is not in sync.

Luckily using pre-commit is very easy to completely get around this by making it automatically run uv sync before push.

First, uv add --dev pre-commit

Then,

# .pre-commit-config.yaml
default_stages: [pre-commit]

repos:
  - repo: local
    hooks:
      - id: uv-sync
        name: UV Sync Dependencies
        entry: uv sync --dev --locked
        language: system
        pass_filenames: false
        stages: [pre-push]

Finally, pre-commit install --hook-type pre-push