As soon as you get to Pants 1.15.x, you’ll want to re-download the

./pants

script by running

curl -L -O <https://pantsbuild.github.io/setup/pants>

. In 1.15.x, we added support for running Pants with Python 3 (which results in a 15% speedup). You need to update the script so that it knows how to use Python 3.

Highlights of some nice upgrades from 1.13.x to 1.27.0rc0: * The V2 Python implementation was added. It has better caching, better parallelism, avoids unnecessary work V1 did, and works with remote execution and buildfarm. * File arguments. You can now say

./pants fmt example.py

, instead of needing to use address arguments like

:example

. Pants will figure out the right thing to do. If using the V2 Python implementation, Pants will only run on that specified file, rather than the entire owning target. * Added support for Flake8, Pylint, Bandit, Black, and Docformatter. * Better output for

./pants goals

,

./pants help

, and

./pants target-types

. * Simpler

sources

field in BUILD files. There’s no more

globs()

and

rglobs()

. Now, it’s just

['*.py', '!ignore.py']

, where the

!

means to exclude the glob. * Support for

pants.toml

instead of

pants.ini

, which removes a lot of gotchas and makes it easier to edit the config file.