Pants v2: Fast, consistent builds for Python and more

Welcome to the Pants v2 documentation hub!

Pants v2 is a fast, scalable build system for growing codebases. It's currently focused on Python, with support for other languages coming soon.

Here you'll find guides to help you get started with Pants v2, comprehensive documentation on how to configure, run and customize Pants v2, and information on how to get help from the Pants community.

Get Started

Release strategy

Our approach to semantic versioning + time-based releases.

Pants follows semantic versioning, along with using regular time-based dev releases. We follow a strict Deprecation policy.

📘

Tip: join the mailing group for release announcements

See Community.

Also see Upgrade tips for suggestions on how to effectively upgrade Pants versions.

Stable releases

Stable releases occur roughly every month. They have been vetted through at least one release candidate.

Stable releases are named with the major, minor, and patch version—with no suffix. For example, 2.1.0 or 2.2.1.

Any new patch versions will only include backward-compatible bug fixes, and will not have new features or new deprecations. Patch versions must have also had at least one release candidate.

🚧

Stable releases may still have bugs

We try our best to write bug-free code, but, like everyone, we sometimes make mistakes.

If you encounter a bug, please gently let us know by opening a GitHub issue or messaging us on Slack. See Community.

Release candidates

rc releases are on track to being stable, but may still have some issues.

Release candidates are named with the major, minor, and patch version, and end in rc and a number. For example, 2.1.0rc0 or 2.1.0rc1.

Release candidates should only contain bug fixes; they should generally not include new features or new deprecations. (Exception for rc0, which can include the same changes as a normal dev release.)

👍

Help wanted: testing out release candidates

We greatly appreciate when users test out release candidates. While we do our best to have comprehensive CI—and we "dogfood" release candidates—we are not able to test all the ways Pants is used in the wild.

If you encounter a bug, please gently let us know by opening a GitHub issue or messaging us on Slack. See Community.

📘

When is a release "stable" enough?

A stable release cannot be created until a minimum of 5 business days from the first rc0 release. Typically, during this time, there will be multiple release candidates to fix any issues discovered.

A stable release can be created two business days after the most recent release candidate if there are no more blockers.

Dev releases

dev releases are weekly releases that occur directly from the main branch, without the additional vetting that is applied to stable releases and release candidates. Usually, these are released on Friday or Monday.

Dev releases help to ensure a steady release cadence from master by filling in the gaps between the more time consuming stable releases.

Dev releases are named with the major, minor, and patch version, and end in .dev and a number. For example, 2.1.0.dev0 or 2.1.0.dev1.

Dev releases can include any changes, so long as they comply with the Deprecation policy.

📘

How many dev releases until starting a release candidate?

Usually, we release 3-4 dev releases before switching to the first release candidate rc0. This means we usually release dev0, dev1, dev2, sometimes dev3, and then rc0.

We try to limit the number of changes in each stable release to make it easier for users to upgrade. If the dev releases have been particularly disruptive, such as making major deprecations, we may start a release candidate sooner, such as after dev1.

Updated 2 months ago


Release strategy


Our approach to semantic versioning + time-based releases.

Suggested Edits are limited on API Reference Pages

You can only suggest edits to Markdown body content, but not to the API spec.