Case Studies Featured

Astranis Case Study: Wrangling Python In a Monorepo

"Code development at Astranis has been migrating towards a monorepo structure. Astranis has grown rapidly since this migration started and, along with it, so has the volume of Python hosted in our monorepo. We went looking for new tooling to bring us into the future."

Concepts

Monorepository linting via Pants's project introspection

Pantsbuild provides a common interface to run all code quality tools in parallel. This post explores how Pants augments excellent linters such as bandit, flake8, shellcheck, etc. by offering its own linting mechanisms, too, including regex matches, dependency analysis, and metadata checks.

Tools > Docker

Optimizing Python + Docker deploys using Pants

Pants can build a PEX file, an executable zip file containing your Python code and all transitive dependencies. Deploying your application is as simple as copying the file. This post elaborates on how to get best performance out of the powerful combination of Pants+PEX+Docker.

CI/CD Featured

Better CI/CD caching with Pants

Pants is designed to utilize fine-grained caching to speed up builds. Users are often interested in how this interacts with CI providers' own caching features, which are necessary since CI jobs typically run in fresh containers, with no direct access to previous state. In particular, we get questions about how

Language Support > JVM Featured

Pants 2.12: Improved performance for common cases, IDE support for Java and Scala

We're pleased to announce Pants 2.12.0 [https://www.pantsbuild.org/v2.12/docs], the latest release of Pants: the scalable and ergonomic build system. To update, set pants_version = "2.12.0" in your pants.toml. See upgrade tips [https://www.pantsbuild.org/docs/upgrade-tips] for more information.

Under The Hood

How we streamlined Apple M1 Support with self-hosted Github Actions runners

We ended up setting up a self-hosted GitHub Actions runner, on a hosted Mac M1. Getting the machine itself up and running was easy, thanks to MacStadium's simple, effective UX. But setting up the GHA runner on it was a little trickier, for a couple of reasons...

Concepts

Multiple lockfiles in Python repos

Rather than forcing global or per-project lockfiles, Pants uses a hybrid approach...This allows a repo to operate with the minimum number of lockfiles required to support their conflicting library versions, without necessarily going to the costly extreme of per-project lockfiles.

Release Announcements Featured

Pants 2.11 adds Go Protobuf codegen, Pex lockfiles for Python, and parametrization

We're pleased to announce Pants 2.11.0, the latest release of Pantsbuild, the scalable and ergonomic build system. To update, set pants_version = "2.11.0" in your pants.toml. See upgrade tips [https://www.pantsbuild.org/docs/upgrade-tips], including the update-build-files goal to automate some of the upgrade.

Under The Hood

Talk Notes: PyCon US 2022 – Hermetic Environments in Pantsbuild

On Sunday 1 May 2022, Pants Maintainer, Christopher Neugebauer gave a talk about Pantsbuild's hermetic environments. Here are some useful resources: * Example Python repo [https://github.com/pantsbuild/example-python] — the codebase where you can run the demos from the start of the talk. * Stu Hood – Faster incremental builds with Speculation

Release Announcements Featured

Pants 2.10 adds multiple Python lockfile support, PyOxidizer, Thrift codegen, and better linter parallelization

We're pleased to announce Pants 2.10.0, the latest release of Pantsbuild, the scalable and ergonomic build system. To update, set pants_version = "2.10.0" in your pants.toml. See upgrade tips [https://www.pantsbuild.org/docs/upgrade-tips], including the update-build-files goal to automate some of the upgrade.

Community

The 2022 annual community survey is a wrap, and the results are in!

We recently conducted our annual survey [https://groups.google.com/g/pants-devel/c/UFt3Os--6ps/m/FCjGTnlRBQAJ] of the Pants community. The purpose, as usual, was to inform the project roadmap for the year. The survey proceeded in two phases: First, we gathered all the potential projects and needs from the

Concepts

Effective monorepos with Pants

Working effectively in a monorepo requires appropriate tooling. While Pants can be a really useful system in repos of all sizes and architectures, it has some features that make it particularly appealing in a monorepo setting…

Concepts

The monorepo approach to code management

If you’re responsible for your organization’s codebase architecture, then at some point you have to make some emphatic choices about how to manage this growth in a scalable way. There are two common architectural alternatives to choose from...

Codegen

Pants 2.10 adds Apache Thrift support for Python

Pants's codegen support solves one of the biggest problems with code generation: how to make sure that local developers, CI, and production are using the same generated code?

Community > Meet the Team

Meet our newest Maintainer: Alexey Tereshenkov

This month, the Pants core maintainers voted to invite Alexey Tereshenkov to become a Maintainer. This is a trusted role earned through demonstrating a long-term interest in Pants, by people who make regular contributions for some time and who plan to continue to do so. Maintainers conduct code reviews of

Language Support > Python

Packaging Python with the PyOxidizer Pants Plugin

Alliterations aside, this post discusses the new PyOxidizer integration coming in Pants 2.10 for packaging Python applications.

Language Support > Python

Choosing a Python interpreter for a Pants project

Choosing a compatible Python interpreter carefully is important not only for developers, but for the Pants repository administrators as well. Developers using Pants build system in their project may see various errors and have different behaviors depending on the Python interpreter...

Community > Meet the Team

Meet our newest Maintainer: Joshua Cannon

The Pants Maintainers [https://www.pantsbuild.org/docs/maintainers] are a group of people with an ongoing commitment to Pants, who help manage and steer the project. Maintainers are a subgroup within the wider Contributor [https://www.pantsbuild.org/docs/the-pants-community#contributors] population. I'm very pleased to introduce the latest

Language Support > JVM Featured

Pants 2.9: Alpha support for Java and Scala, improvements for Docker and Go, and more

We're pleased to announce [Pants 2.9.0](https://www.pantsbuild.org/v2.9/docs), the latest release of Pants: the scalable and ergonomic build system!

Community

You can call us Pantsbuild (or Pants, whichever you prefer)

As more and more people start using and discovering Pants, we’ve discovered that it’s difficult to talk about the tool without introducing it as The Pants Build System, which isn’t very snappy or easy to remember. Especially in titles of posts or in tweets without that much

Getting Started

Updating Pants BUILD files programmatically

Introduction Working with a monorepository implies dealing with build metadata files that provide information about the source code and how it should be built. Pants build system uses BUILD files which are valid Python files and are evaluated using a Python interpreter as a list of statements. When adding support

Community

Happy new year!

Hi Pants community, 2021 was another massive year for the project, even as the pandemic continued to disrupt our lives in so many challenging ways. We grew our Python user base significantly, engaged in critical developer relations [https://www.pantsbuild.org/docs/media] efforts, gained new community members, including several

Getting Started

Docs improvements

We've added a spate of new pages in recent months, plus Eric Arellano just completed a thorough audit of the docs which resulted in overhauling several pages. So if you haven't checked all of these out docs pages recently, give 'em a read or re-visit: Overhauled Getting Started * Key concepts

Language Support > JVM

Automatically unlocking concurrent builds and fine-grained caching on the JVM with dependency inference

We’ve been busy working on JVM support for the open source Pants Build system, starting with support for Java and Scala. We’re excited about the progress we’ve made with Java support, and we want to share with you some of the more exciting work we’ve done.

Getting Started Featured

Pants vs. Bazel: Why Pants may be the right choice for your team

Many considerations go into evaluating and adopting a new build system: performance, scalability language and framework support, ease of adoption and use, extensibility, compatibility with existing practices, and more.…