v0.2.23

Enhancements

• Add juv stamp for time-based dependency resolution pinning (#50)

Notes

uv supports time-based dependency resolution via exclude-newer, allowing packages to be resolved as they existed at a specific moment in time.

This feature greatly enhances the reproducibility of one-off scripts and notebooks without needing a lockfile. However, exclude-newer requires a full RFC 3339 timestamp (e.g., 2020-03-05T00:00:00-05:00), which can be tedious to manage manually.

This release introduces juv stamp, a command that provides a high-level, ergonomic API for pinning and unpinning various relevant timestamps in both standalone Python scripts and Jupyter notebooks:

# Stamp a notebook
juv init foo.ipynb
juv stamp foo.ipynb

# Stamp with a specific time
juv stamp foo.ipynb --time "2020-03-05T00:00:00-05:00"
juv stamp foo.ipynb --date 2022-01-03

# Use Git revisions
juv stamp foo.ipynb --rev e20c99
juv stamp foo.ipynb --latest

# Clear the pinned timestamp
juv stamp foo.ipynb --clear

# For Python scripts
uv init --script foo.py
uv add --script foo.py polars anywidget
uvx juv stamp foo.py